424 lines
20 KiB
JSON
424 lines
20 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-2025-21780",
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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": "2024-12-29T08:45:45.764Z",
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"datePublished": "2025-02-27T02:18:23.543Z",
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"dateUpdated": "2026-11-10T12:35:01.819Z"
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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": "2026-08-05T11:54:22.764Z"
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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\ndrm/amdgpu: avoid buffer overflow attach in smu_sys_set_pp_table()\n\nIt malicious user provides a small pptable through sysfs and then\na bigger pptable, it may cause buffer overflow attack in function\nsmu_sys_set_pp_table()."
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}
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],
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"metrics": [
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{
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"version": "3.1",
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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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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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{
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"lang": "en",
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"value": "AV:L - The vulnerability is reached exclusively by writing to the local sysfs attribute /sys/class/drm/cardN/device/pp_table; there is no remote or adjacent-network path to smu_sys_set_pp_table().\nAC:L - Triggering is fully deterministic — write a tiny pptable whose 16-bit usStructureSize matches the write length, then write a larger one; there is no race, no ASLR dependency, and the attacker chooses both the allocation size and the overflow length/content.\nPR:L - The attribute is 0644 by default, but on AMD desktop/handheld/gaming deployments the amdgpu pp_* power-tuning nodes are routinely made group-writable via udev rules so unprivileged GUI overclocking tools can use them, and the fix's own changelog describes the attacker as a \"malicious user\"; per the choose-higher rule this is scored as an unprivileged local user rather than init-namespace root.\nUI:N - The attacker performs two ordinary write() calls on their own; no victim action, mount, or file-open by another user is involved.\nS:U - The heap corruption occurs in the kernel's own slab allocator and is confined to the kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Beyond the write primitive, the stale power_play_table_size makes amdgpu_get_pp_table() memcpy up to PAGE_SIZE-1 bytes out of a 1-byte allocation straight back to userspace, directly disclosing ~4 KB of adjacent kernel heap; the overflow itself also enables arbitrary read via corrupted adjacent objects.\nI:H - This is an out-of-bounds heap write of up to ~4 KB with fully attacker-chosen contents starting from a kmalloc-8 object, smashing many adjacent slab objects — a classic primitive for function-pointer/credential overwrite and privilege escalation.\nA:H - Overwriting kilobytes of adjacent slab objects and freelist metadata reliably produces slab corruption panics/oopses, and smu_reset() is then invoked with the corrupted power-play table, hanging or wedging the GPU."
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}
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]
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}
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],
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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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"drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c"
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],
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"status": "affected",
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"version": "0",
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"status": "unaffected",
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"version": "6.13.4",
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"lessThanOrEqual": "6.13.*",
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"status": "unaffected",
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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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"availabilityImpact": "HIGH",
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"type": "ssvc",
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"content": {
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"id": "CVE-2025-21780",
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"role": "CISA Coordinator",
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"type": "CWE",
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"cweId": "CWE-120",
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"description": "CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"
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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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"dateUpdated": "2025-10-01T19:36:40.157Z"
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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/2025/03/msg00028.html"
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"dateUpdated": "2025-11-03T20:59:26.137Z"
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"dateUpdated": "2026-11-10T12:35:01.819Z"
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},
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"affected": [
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)",
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"versions": [
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{
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"versions": [
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{
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} |