{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "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": "2026-05-23T15:22:30.837Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:22:30.837Z" }, "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" }, { "version": "3.2.49", "lessThan": "3.3", "status": "affected", "versionType": "semver" }, { "version": "3.4.52", "lessThan": "3.5", "status": "affected", "versionType": "semver" }, { "version": "3.9.8", "lessThan": "3.10", "status": "affected", "versionType": "semver" } ] }, { "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" } } ] } }