398 lines
19 KiB
JSON
398 lines
19 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-21991",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-12-29T08:45:45.800Z",
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"datePublished": "2025-04-02T12:53:14.230Z",
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"dateUpdated": "2026-05-23T15:57:34.986Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-05-23T15:57:34.986Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/microcode/AMD: Fix out-of-bounds on systems with CPU-less NUMA nodes\n\nCurrently, load_microcode_amd() iterates over all NUMA nodes, retrieves their\nCPU masks and unconditionally accesses per-CPU data for the first CPU of each\nmask.\n\nAccording to Documentation/admin-guide/mm/numaperf.rst:\n\n \"Some memory may share the same node as a CPU, and others are provided as\n memory only nodes.\"\n\nTherefore, some node CPU masks may be empty and wouldn't have a \"first CPU\".\n\nOn a machine with far memory (and therefore CPU-less NUMA nodes):\n- cpumask_of_node(nid) is 0\n- cpumask_first(0) is CONFIG_NR_CPUS\n- cpu_data(CONFIG_NR_CPUS) accesses the cpu_info per-CPU array at an\n index that is 1 out of bounds\n\nThis does not have any security implications since flashing microcode is\na privileged operation but I believe this has reliability implications by\npotentially corrupting memory while flashing a microcode update.\n\nWhen booting with CONFIG_UBSAN_BOUNDS=y on an AMD machine that flashes\na microcode update. I get the following splat:\n\n UBSAN: array-index-out-of-bounds in arch/x86/kernel/cpu/microcode/amd.c:X:Y\n index 512 is out of range for type 'unsigned long[512]'\n [...]\n Call Trace:\n dump_stack\n __ubsan_handle_out_of_bounds\n load_microcode_amd\n request_microcode_amd\n reload_store\n kernfs_fop_write_iter\n vfs_write\n ksys_write\n do_syscall_64\n entry_SYSCALL_64_after_hwframe\n\nChange the loop to go over only NUMA nodes which have CPUs before determining\nwhether the first CPU on the respective node needs microcode update.\n\n [ bp: Massage commit message, fix typo. ]"
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/x86/kernel/cpu/microcode/amd.c"
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],
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"versions": [
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{
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"version": "979e197968a1e8f09bf0d706801dba4432f85ab3",
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"lessThan": "d509c4731090ebd9bbdb72c70a2d70003ae81f4f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "44a44b57e88f311c1415be1f567c50050913c149",
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"lessThan": "985a536e04bbfffb1770df43c6470f635a6b1073",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "be2710deaed3ab1402379a2ede30a3754fe6767a",
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"lessThan": "18b5d857c6496b78ead2fd10001b81ae32d30cac",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d576547f489c935b9897d4acf8beee3325dea8a5",
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"lessThan": "ec52240622c4d218d0240079b7c1d3ec2328a9f4",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "7ff6edf4fef38ab404ee7861f257e28eaaeed35f",
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"lessThan": "e686349cc19e800dac8971929089ba5ff59abfb0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "7ff6edf4fef38ab404ee7861f257e28eaaeed35f",
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"lessThan": "488ffc0cac38f203979f83634236ee53251ce593",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "7ff6edf4fef38ab404ee7861f257e28eaaeed35f",
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"lessThan": "5ac295dfccb5b015493f86694fa13a0dde4d3665",
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"status": "affected",
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},
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{
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"version": "7ff6edf4fef38ab404ee7861f257e28eaaeed35f",
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"lessThan": "e3e89178a9f4a80092578af3ff3c8478f9187d59",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d6353e2fc12c5b8f00f86efa30ed73d2da2f77be",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1b1e0eb1d2971a686b9f7bdc146115bcefcbb960",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "eaf5dea1eb8c2928554b3ca717575cbe232b843c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5.4.235",
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"lessThan": "5.4.292",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.10.173",
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"lessThan": "5.10.236",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.15.99",
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"lessThan": "5.15.180",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.1.16",
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"lessThan": "6.1.132",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "4.14.308",
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"lessThan": "4.15",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "4.19.276",
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"lessThan": "4.20",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.2.3",
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"lessThan": "6.3",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/x86/kernel/cpu/microcode/amd.c"
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],
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"versions": [
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{
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"version": "6.3",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.3",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.4.292",
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"lessThanOrEqual": "5.4.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.236",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.180",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.132",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.84",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.20",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.13.8",
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"lessThanOrEqual": "6.13.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.14",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"versionStartIncluding": "5.4.235",
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{
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},
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},
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},
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{
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},
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{
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"vulnerable": true,
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/d509c4731090ebd9bbdb72c70a2d70003ae81f4f"
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},
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{
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"url": "https://git.kernel.org/stable/c/985a536e04bbfffb1770df43c6470f635a6b1073"
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},
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{
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"url": "https://git.kernel.org/stable/c/18b5d857c6496b78ead2fd10001b81ae32d30cac"
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},
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{
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"url": "https://git.kernel.org/stable/c/ec52240622c4d218d0240079b7c1d3ec2328a9f4"
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},
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{
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"url": "https://git.kernel.org/stable/c/e686349cc19e800dac8971929089ba5ff59abfb0"
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},
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{
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"url": "https://git.kernel.org/stable/c/488ffc0cac38f203979f83634236ee53251ce593"
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},
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{
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"url": "https://git.kernel.org/stable/c/5ac295dfccb5b015493f86694fa13a0dde4d3665"
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},
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{
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"url": "https://git.kernel.org/stable/c/e3e89178a9f4a80092578af3ff3c8478f9187d59"
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}
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],
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"title": "x86/microcode/AMD: Fix out-of-bounds on systems with CPU-less NUMA nodes",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"problemTypes": [
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{
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"descriptions": [
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{
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"type": "CWE",
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"cweId": "CWE-129",
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"lang": "en",
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"description": "CWE-129 Improper Validation of Array Index"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.8,
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"attackVector": "LOCAL",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"integrityImpact": "HIGH",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "HIGH"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2025-10-01T17:13:39.419226Z",
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"id": "CVE-2025-21991",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2025-10-01T17:13:42.269Z"
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}
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},
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2025-11-03T19:40:28.243Z"
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}
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}
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]
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}
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} |