CVE-2026-53370

{"id": "CVE-2026-53370", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "ec980e4facef8110f6fce27e5b6344660117f01f", "lessThan": "aab56b95bee3ff79176b13443cd9d7cfe9747df0", "versionType": "git"}, {"status": "affected", "version": "ec980e4facef8110f6fce27e5b6344660117f01f", "lessThan": "c05e01cef47d9b4969eae2dcf9467e2a555bcb4f", "versionType": "git"}, {"status": "affected", "version": "ec980e4facef8110f6fce27e5b6344660117f01f", "lessThan": "5ad732a56be46aabf158c16aa0c095291727aaef", "versionType": "git"}], "programFiles": ["arch/x86/events/intel/core.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"status": "unaffected", "version": "0", "lessThan": "6.16", "versionType": "semver"}, {"status": "unaffected", "version": "6.18.30", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.7", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["arch/x86/events/intel/core.c"], "defaultStatus": "affected"}]}], "published": "2026-07-19T09:17:02.153", "references": [{"url": "https://git.kernel.org/stable/c/5ad732a56be46aabf158c16aa0c095291727aaef", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/aab56b95bee3ff79176b13443cd9d7cfe9747df0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c05e01cef47d9b4969eae2dcf9467e2a555bcb4f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "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."}], "lastModified": "2026-07-29T16:55:32.737", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0C6ED95F-C349-4582-8D0B-43787F134EDA", "versionEndExcluding": "6.18.30", "versionStartIncluding": "6.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D0893CA7-9AE6-4DFE-AC75-48967D73AD8E", "versionEndExcluding": "7.0.7", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}