{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53370", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.401Z", "datePublished": "2026-07-19T09:10:30.990Z", "dateUpdated": "2026-07-19T09:10:30.990Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T09:10:30.990Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86/intel: Improve validation and configuration of ACR masks\n\nCurrently there are several issues on the user space ACR mask validation\nand configuration.\n- The validation for user space ACR mask (attr.config2) is incomplete,\n e.g., the ACR mask could include the index which belongs to another\n ACR events group, but it's not validated.\n- An early return on an invalid ACR mask caused all subsequent ACR groups\n to be skipped.\n- The stale hardware ACR mask (hw.config1) is not cleared before setting\n new hardware ACR mask.\n\nThe following changes address all of the above issues.\n- Figure out the event index group of an ACR group. Any bits in the\n user-space mask not present in the index group are now dropped.\n- Instead of an early return on invalid bits, drop only the invalid\n portions and continue iterating through all ACR events to ensure full\n configuration.\n- Explicitly clear the stale hardware ACR mask for each event prior to\n writing the new configuration.\n\nBesides, a non-leader event member of ACR group could be disabled in\ntheory. This could cause bit-shifting errors in the acr_mask of remaining\ngroup members. But since ACR sampling requires all events to be active,\nthis should not be a big concern in real use case. Add a \"FIXME\" comment\nto notice this risk."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/events/intel/core.c"], "versions": [{"version": "ec980e4facef8110f6fce27e5b6344660117f01f", "lessThan": "aab56b95bee3ff79176b13443cd9d7cfe9747df0", "status": "affected", "versionType": "git"}, {"version": "ec980e4facef8110f6fce27e5b6344660117f01f", "lessThan": "c05e01cef47d9b4969eae2dcf9467e2a555bcb4f", "status": "affected", "versionType": "git"}, {"version": "ec980e4facef8110f6fce27e5b6344660117f01f", "lessThan": "5ad732a56be46aabf158c16aa0c095291727aaef", "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/intel/core.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.30", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.7", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "6.16", "versionEndExcluding": "6.18.30"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.0.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/aab56b95bee3ff79176b13443cd9d7cfe9747df0"}, {"url": "https://git.kernel.org/stable/c/c05e01cef47d9b4969eae2dcf9467e2a555bcb4f"}, {"url": "https://git.kernel.org/stable/c/5ad732a56be46aabf158c16aa0c095291727aaef"}], "title": "perf/x86/intel: Improve validation and configuration of ACR masks", "x_generator": {"engine": "bippy-1.2.0"}}}}

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