{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64300", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.778Z", "datePublished": "2026-07-25T08:49:36.372Z", "dateUpdated": "2026-07-25T08:49:36.372Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T08:49:36.372Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/aux: Fix page UAF in map_range()\n\nmap_range() reads rb->aux_pages[], rb->aux_nr_pages and rb->aux_pgoff via\nperf_mmap_to_page() while holding only event->mmap_mutex. Those fields are\nserialized by rb->aux_mutex, and mmap_mutex is per event.\n\nThus, two events sharing one rb via PERF_EVENT_IOC_SET_OUTPUT can race\nrb_alloc_aux() with map_range(), leading to a page-UAF scenario as follows:\n\n CPU 0 CPU 1\n ===== =====\n rb_alloc_aux() map_range()\n [1]: allocate rb->aux_pages[0]\n [2]: rb->aux_nr_pages++\n [3]: perf_mmap_to_page()\n returns rb->aux_pages[0]\n [4]: map it as VM_PFNMAP\n [5]: rb->aux_pgoff = 1\n\n munmap the page\n [6]: free rb->aux_pages[0]\n\nPages mapped as VM_PFNMAP have no refcount protection, so CPU 1 holds a\nmapping to a freed physical frame.\n\nFix this by taking rb->aux_mutex across the page walk in map_range()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/events/core.c"], "versions": [{"version": "b709eb872e19a19607bbb6d2975bc264d59735cf", "lessThan": "c8b7e113f7b61eef2f017e6329c27c2331058c5a", "status": "affected", "versionType": "git"}, {"version": "b709eb872e19a19607bbb6d2975bc264d59735cf", "lessThan": "0cff05bd2186020f8706233e261016d149cc24db", "status": "affected", "versionType": "git"}, {"version": "b709eb872e19a19607bbb6d2975bc264d59735cf", "lessThan": "5948aaf64f81f217a25dcc2bf6c0779bca19566c", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/events/core.c"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc3", "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": "6.14", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.2-rc3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c8b7e113f7b61eef2f017e6329c27c2331058c5a"}, {"url": "https://git.kernel.org/stable/c/0cff05bd2186020f8706233e261016d149cc24db"}, {"url": "https://git.kernel.org/stable/c/5948aaf64f81f217a25dcc2bf6c0779bca19566c"}], "title": "perf/aux: Fix page UAF in map_range()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b709eb872e19a19607bbb6d2975bc264d59735cf,c8b7e113f7b61eef2f017e6329c27c2331058c5a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b709eb872e19a19607bbb6d2975bc264d59735cf,0cff05bd2186020f8706233e261016d149cc24db)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b709eb872e19a19607bbb6d2975bc264d59735cf,5948aaf64f81f217a25dcc2bf6c0779bca19566c)"}}], "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": "6.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.2.0)"}}, {"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": "2026-07-25T14:45:03.406022+00:00", "updated": "2026-07-25T14:45:03.406053+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}