143 lines
6.9 KiB
JSON
143 lines
6.9 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-2026-98552",
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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": "2026-09-25T10:25:14.356Z",
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"datePublished": "2026-10-18T15:18:19.810Z",
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"dateUpdated": "2026-10-19T09:21:35.261Z"
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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": "2026-10-19T09:21:35.261Z"
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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\nperf/core: Fix a refcount leak in attach_perf_ctx_data()\n\nThe attach_perf_ctx_data() can race on global and !global cases. The\nglobal case is protected by global_ctx_data_rwsem and shares a single\nreference count using perf_ctx_data.global field.\n\nBut when it races with !global case, it may miss to set the global field\nand result in a reference count leak.\n\n CPU1 CPU2\n ----------------------------------------------------------------\n attach_task_ctx_data(.global=1) attach_task_ctx_data(.global=0)\n cd1 = alloc_perf_ctx_data(); cd2 = alloc_perf_ctx_data();\n // { .global = 0, .refcount = 1 };\n\n try_cmpxchg(); // success,\n // task->perf_ctx_data = cd2\n try_cmpxhg(); // fail; old = cd2\n refcount_inc_not_zero(&old->refcount); // success\n // old.refcount = 2\n free_perf_ctx_data(cd1);\n\nThen later detach_global_ctx_data() will see the data but it's not\nmarked as global, so it won't call detach_task_ctx_data()."
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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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"kernel/events/core.c"
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],
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"versions": [
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{
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"version": "506e64e710ff9573fd2b86686528762b7901b5e4",
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"lessThan": "23250517cd475367653f1e99396967f54c6f1b7c",
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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": "506e64e710ff9573fd2b86686528762b7901b5e4",
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"lessThan": "5286d4eb5cd7e10d7d93c3cc596e18bc8ad80f72",
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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": "506e64e710ff9573fd2b86686528762b7901b5e4",
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"lessThan": "cca4980630b3c7a85f53cb43c6018184ce5d4e37",
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"status": "affected",
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"versionType": "git"
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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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"kernel/events/core.c"
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],
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"versions": [
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{
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"version": "6.15",
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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": "6.15",
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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": "6.18.55",
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"lessThanOrEqual": "6.18.*",
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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": "7.2.9",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15",
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"versionEndExcluding": "6.18.55"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15",
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"versionEndExcluding": "7.2.9"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15",
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"versionEndExcluding": "7.3"
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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/23250517cd475367653f1e99396967f54c6f1b7c"
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},
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{
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"url": "https://git.kernel.org/stable/c/5286d4eb5cd7e10d7d93c3cc596e18bc8ad80f72"
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},
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{
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"url": "https://git.kernel.org/stable/c/cca4980630b3c7a85f53cb43c6018184ce5d4e37"
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}
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],
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"title": "perf/core: Fix a refcount leak in attach_perf_ctx_data()",
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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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}
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} |