206 lines
10 KiB
JSON
206 lines
10 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-2026-72237",
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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": "2026-08-09T03:40:39.914Z",
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"datePublished": "2026-08-15T05:54:26.685Z",
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"dateUpdated": "2026-08-19T16:36:31.271Z"
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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": "2026-08-19T16:36:31.271Z"
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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/x86/amd/brs: Fix kernel address leakage\n\nA user-only branch stack can contain branches that originate from\nthe kernel. As a result, kernel addresses are exposed to user space\neven when PERF_SAMPLE_BRANCH_USER is requested. On AMD processors\nsupporting X86_FEATURE_BRS (Zen 3 only), perf can still report entries\nsuch as SYSRET/interrupt returns for which the branch-from addresses\nare in the kernel.\n\nE.g.\n\n $ perf record -j any,u -c 4000 -e branch-brs -o - -- \\\n perf bench syscall basic --loop 1000 | \\\n perf script -i - -F brstack|tr ' ' '\\n'| \\\n grep -E '0x[89a-f][0-9a-f]{15}'\n\n ...\n 0xffffffff810001c4/0x72e2e32955eb/-/-/-/0//-\n 0xffffffff810001c4/0x72e2d94a9821/-/-/-/0//-\n 0xffffffff810001c4/0x72e2d94ffa1b/-/-/-/0//-\n ...\n\nBRS provides no hardware branch filtering, so privilege level\nfiltering is performed entirely in software. However, amd_brs_match_plm()\nonly validates the branch-to address against the requested privilege\nlevels. For branches from the kernel to user space, the branch-from\naddress is left unchecked and is leaked. Extend the software filter to\nalso validate the branch-from address, so that any branch record whose\nbranch-from address is in the kernel is dropped when\nPERF_SAMPLE_BRANCH_USER is requested."
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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/events/amd/brs.c"
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],
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"versions": [
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{
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"version": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08",
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"lessThan": "4f949bc3913a6e3ce3b8574ac6ed1da8ec7a5ad1",
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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": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08",
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"lessThan": "ac44b4a3d6137489f8fa2e794b12e849c6b22eaa",
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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": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08",
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"lessThan": "90843d00dbc61220b66408ea0d8775cae9e51f70",
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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": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08",
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"lessThan": "046f6244da9b68e463a849b21446b9424e531491",
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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": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08",
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"lessThan": "2e706be56f418718bb3ae66c0aa94f9b61150e6d",
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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": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08",
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"lessThan": "47915e855fb38b42133e31ba917d99565f862154",
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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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"arch/x86/events/amd/brs.c"
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],
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"versions": [
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{
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"version": "5.19",
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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": "5.19",
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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": "6.1.183",
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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": "6.6.145",
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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": "6.12.97",
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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": "6.18.40",
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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": "7.1.5",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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": "5.19",
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"versionEndExcluding": "6.1.183"
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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": "5.19",
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"versionEndExcluding": "6.6.145"
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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": "5.19",
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"versionEndExcluding": "6.12.97"
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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": "5.19",
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"versionEndExcluding": "6.18.40"
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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": "5.19",
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"versionEndExcluding": "7.1.5"
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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": "5.19",
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"versionEndExcluding": "7.2"
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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/4f949bc3913a6e3ce3b8574ac6ed1da8ec7a5ad1"
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},
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{
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"url": "https://git.kernel.org/stable/c/ac44b4a3d6137489f8fa2e794b12e849c6b22eaa"
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},
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{
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"url": "https://git.kernel.org/stable/c/90843d00dbc61220b66408ea0d8775cae9e51f70"
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},
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{
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"url": "https://git.kernel.org/stable/c/046f6244da9b68e463a849b21446b9424e531491"
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},
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{
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"url": "https://git.kernel.org/stable/c/2e706be56f418718bb3ae66c0aa94f9b61150e6d"
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},
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{
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"url": "https://git.kernel.org/stable/c/47915e855fb38b42133e31ba917d99565f862154"
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}
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],
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"title": "perf/x86/amd/brs: Fix kernel address leakage",
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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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} |