{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2022-49607","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-02-26T02:21:30.417Z","datePublished":"2025-02-26T02:23:31.823Z","dateUpdated":"2025-10-01T19:36:51.711Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T12:44:58.322Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/core: Fix data race between perf_event_set_output() and perf_mmap_close()\n\nYang Jihing reported a race between perf_event_set_output() and\nperf_mmap_close():\n\n\tCPU1\t\t\t\t\tCPU2\n\n\tperf_mmap_close(e2)\n\t  if (atomic_dec_and_test(&e2->rb->mmap_count)) // 1 - > 0\n\t    detach_rest = true\n\n\t\t\t\t\t\tioctl(e1, IOC_SET_OUTPUT, e2)\n\t\t\t\t\t\t  perf_event_set_output(e1, e2)\n\n\t  ...\n\t  list_for_each_entry_rcu(e, &e2->rb->event_list, rb_entry)\n\t    ring_buffer_attach(e, NULL);\n\t    // e1 isn't yet added and\n\t    // therefore not detached\n\n\t\t\t\t\t\t    ring_buffer_attach(e1, e2->rb)\n\t\t\t\t\t\t      list_add_rcu(&e1->rb_entry,\n\t\t\t\t\t\t\t\t   &e2->rb->event_list)\n\nAfter this; e1 is attached to an unmapped rb and a subsequent\nperf_mmap() will loop forever more:\n\n\tagain:\n\t\tmutex_lock(&e->mmap_mutex);\n\t\tif (event->rb) {\n\t\t\t...\n\t\t\tif (!atomic_inc_not_zero(&e->rb->mmap_count)) {\n\t\t\t\t...\n\t\t\t\tmutex_unlock(&e->mmap_mutex);\n\t\t\t\tgoto again;\n\t\t\t}\n\t\t}\n\nThe loop in perf_mmap_close() holds e2->mmap_mutex, while the attach\nin perf_event_set_output() holds e1->mmap_mutex. As such there is no\nserialization to avoid this race.\n\nChange perf_event_set_output() to take both e1->mmap_mutex and\ne2->mmap_mutex to alleviate that problem. Additionally, have the loop\nin perf_mmap() detach the rb directly, this avoids having to wait for\nthe concurrent perf_mmap_close() to get around to doing it to make\nprogress."}],"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":"9bb5d40cd93c9dd4be74834b1dcb1ba03629716b","lessThan":"3bbd868099287ff9027db59029b502fcfa2202a0","status":"affected","versionType":"git"},{"version":"9bb5d40cd93c9dd4be74834b1dcb1ba03629716b","lessThan":"f836f9ac95df15f1e0af4beb0ec20021e8c91998","status":"affected","versionType":"git"},{"version":"9bb5d40cd93c9dd4be74834b1dcb1ba03629716b","lessThan":"17f5417194136517ee9bbd6511249e5310e5617c","status":"affected","versionType":"git"},{"version":"9bb5d40cd93c9dd4be74834b1dcb1ba03629716b","lessThan":"98c3c8fd0d4c560e0f8335b79c407bbf7fc9462c","status":"affected","versionType":"git"},{"version":"9bb5d40cd93c9dd4be74834b1dcb1ba03629716b","lessThan":"43128b3eee337824158f34da6648163d2f2fb937","status":"affected","versionType":"git"},{"version":"9bb5d40cd93c9dd4be74834b1dcb1ba03629716b","lessThan":"da3c256e2d0ebc87c7db0c605c9692b6f1722074","status":"affected","versionType":"git"},{"version":"9bb5d40cd93c9dd4be74834b1dcb1ba03629716b","lessThan":"a9391ff7a7c5f113d6f2bf6621d49110950de49c","status":"affected","versionType":"git"},{"version":"9bb5d40cd93c9dd4be74834b1dcb1ba03629716b","lessThan":"68e3c69803dada336893640110cb87221bb01dcf","status":"affected","versionType":"git"},{"version":"2487f0db30527032c4d56fc2d0b1a240fe89fef8","status":"affected","versionType":"git"},{"version":"703197b61d05f5edae54bad3256901c5a5c8794c","status":"affected","versionType":"git"},{"version":"c52217e88ae0f3a4ae00562d86e338f8f85969b4","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":"3.10","status":"affected"},{"version":"0","lessThan":"3.10","status":"unaffected","versionType":"semver"},{"version":"4.9.325","lessThanOrEqual":"4.9.*","status":"unaffected","versionType":"semver"},{"version":"4.14.290","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.254","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.208","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.134","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.58","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"5.18.15","lessThanOrEqual":"5.18.*","status":"unaffected","versionType":"semver"},{"version":"5.19","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":"3.10","versionEndExcluding":"4.9.325"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"4.14.290"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"4.19.254"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.4.208"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.10.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.15.58"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.18.15"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2.49"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9.8"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/3bbd868099287ff9027db59029b502fcfa2202a0"},{"url":"https://git.kernel.org/stable/c/f836f9ac95df15f1e0af4beb0ec20021e8c91998"},{"url":"https://git.kernel.org/stable/c/17f5417194136517ee9bbd6511249e5310e5617c"},{"url":"https://git.kernel.org/stable/c/98c3c8fd0d4c560e0f8335b79c407bbf7fc9462c"},{"url":"https://git.kernel.org/stable/c/43128b3eee337824158f34da6648163d2f2fb937"},{"url":"https://git.kernel.org/stable/c/da3c256e2d0ebc87c7db0c605c9692b6f1722074"},{"url":"https://git.kernel.org/stable/c/a9391ff7a7c5f113d6f2bf6621d49110950de49c"},{"url":"https://git.kernel.org/stable/c/68e3c69803dada336893640110cb87221bb01dcf"}],"title":"perf/core: Fix data race between perf_event_set_output() and perf_mmap_close()","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":4.7,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"HIGH","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2022-49607","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2025-10-01T19:35:03.904350Z"}}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-362","description":"CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-10-01T19:36:51.711Z"}}]}}