CVE-2026-72237

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72237", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.914Z", "datePublished": "2026-08-15T05:54:26.685Z", "dateUpdated": "2026-08-19T16:36:31.271Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:36:31.271Z"}, "descriptions": [{"lang": "en", "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/events/amd/brs.c"], "versions": [{"version": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08", "lessThan": "4f949bc3913a6e3ce3b8574ac6ed1da8ec7a5ad1", "status": "affected", "versionType": "git"}, {"version": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08", "lessThan": "ac44b4a3d6137489f8fa2e794b12e849c6b22eaa", "status": "affected", "versionType": "git"}, {"version": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08", "lessThan": "90843d00dbc61220b66408ea0d8775cae9e51f70", "status": "affected", "versionType": "git"}, {"version": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08", "lessThan": "046f6244da9b68e463a849b21446b9424e531491", "status": "affected", "versionType": "git"}, {"version": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08", "lessThan": "2e706be56f418718bb3ae66c0aa94f9b61150e6d", "status": "affected", "versionType": "git"}, {"version": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08", "lessThan": "47915e855fb38b42133e31ba917d99565f862154", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/events/amd/brs.c"], "versions": [{"version": "5.19", "status": "affected"}, {"version": "0", "lessThan": "5.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.1.183"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4f949bc3913a6e3ce3b8574ac6ed1da8ec7a5ad1"}, {"url": "https://git.kernel.org/stable/c/ac44b4a3d6137489f8fa2e794b12e849c6b22eaa"}, {"url": "https://git.kernel.org/stable/c/90843d00dbc61220b66408ea0d8775cae9e51f70"}, {"url": "https://git.kernel.org/stable/c/046f6244da9b68e463a849b21446b9424e531491"}, {"url": "https://git.kernel.org/stable/c/2e706be56f418718bb3ae66c0aa94f9b61150e6d"}, {"url": "https://git.kernel.org/stable/c/47915e855fb38b42133e31ba917d99565f862154"}], "title": "perf/x86/amd/brs: Fix kernel address leakage", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/x86/events/amd/brs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4f949bc3913a6e3ce3b8574ac6ed1da8ec7a5ad1", "status": "affected", "version": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08", "versionType": "git"}, {"lessThan": "ac44b4a3d6137489f8fa2e794b12e849c6b22eaa", "status": "affected", "version": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08", "versionType": "git"}, {"lessThan": "90843d00dbc61220b66408ea0d8775cae9e51f70", "status": "affected", "version": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08", "versionType": "git"}, {"lessThan": "046f6244da9b68e463a849b21446b9424e531491", "status": "affected", "version": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08", "versionType": "git"}, {"lessThan": "2e706be56f418718bb3ae66c0aa94f9b61150e6d", "status": "affected", "version": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08", "versionType": "git"}, {"lessThan": "47915e855fb38b42133e31ba917d99565f862154", "status": "affected", "version": "8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/x86/events/amd/brs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.19"}, {"lessThan": "5.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.183", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "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."}], "id": "CVE-2026-72237", "lastModified": "2026-08-19T17:21:00.693", "metrics": {}, "published": "2026-08-15T06:21:50.733", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/046f6244da9b68e463a849b21446b9424e531491"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2e706be56f418718bb3ae66c0aa94f9b61150e6d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/47915e855fb38b42133e31ba917d99565f862154"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4f949bc3913a6e3ce3b8574ac6ed1da8ec7a5ad1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/90843d00dbc61220b66408ea0d8775cae9e51f70"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ac44b4a3d6137489f8fa2e794b12e849c6b22eaa"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: perf/x86/amd/brs: Fix kernel address leakage", "id": "2516345", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516345"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1220", "details": ["A flaw was found in the Linux kernel. A local user can exploit a vulnerability in the `perf` subsystem on AMD processors utilizing the Branch Sampling (BRS) feature. This flaw occurs because the software filtering mechanism for branch records only validates the branch-to address, leaving the branch-from address unchecked. This oversight allows kernel addresses to be exposed to user space, leading to information disclosure."], "name": "CVE-2026-72237", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72237\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72237\nhttps://lore.kernel.org/linux-cve-announce/2026081550-CVE-2026-72237-ef81@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08,ac44b4a3d6137489f8fa2e794b12e849c6b22eaa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08,90843d00dbc61220b66408ea0d8775cae9e51f70)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08,046f6244da9b68e463a849b21446b9424e531491)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08,2e706be56f418718bb3ae66c0aa94f9b61150e6d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8910075d61a37e5b0d82e6c83ed9a0a31fe9ea08,47915e855fb38b42133e31ba917d99565f862154)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc3,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T10:30:05.219244+00:00", "updated": "2026-08-18T19:45:03.301281+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}