{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49377", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:08:31.558Z", "datePublished": "2025-02-26T02:11:16.607Z", "dateUpdated": "2026-08-05T08:54:57.701Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:54:57.701Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: don't touch ->tagset in blk_mq_get_sq_hctx\n\nblk_mq_run_hw_queues() could be run when there isn't queued request and\nafter queue is cleaned up, at that time tagset is freed, because tagset\nlifetime is covered by driver, and often freed after blk_cleanup_queue()\nreturns.\n\nSo don't touch ->tagset for figuring out current default hctx by the mapping\nbuilt in request queue, so use-after-free on tagset can be avoided. Meantime\nthis way should be fast than retrieving mapping from tagset." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is in blk-mq core and is reached via local block-layer paths (device teardown/hot-remove, I/O completion kicking queues), not by processing remote network packets.\nAC:L - An attacker can drive both sides of the race by generating concurrent I/O/queue-run activity while triggering device removal or cleanup, so success does not depend on conditions outside their control.\nPR:L - A basic local user can reach the path via hot-removable block devices they are allowed to use (e.g., USB mass-storage eject/power-off while I/O is in flight); CAP_SYS_ADMIN in the init namespace is not required.\nUI:N - Exploitation does not require a separate victim action; the attacker initiates I/O and device teardown themselves.\nS:U - This is a same-host kernel memory-safety issue (privilege escalation/DoS within the kernel authority), not a scope-changing escape such as guest-to-host or IOMMU bypass.\nC:H - Use-after-free of the driver tagset (including map pointers consulted during hctx lookup) can be turned into an arbitrary read primitive via heap reuse of the freed object.\nI:H - The same UAF enables heap spraying and corruption of reclaimable tagset/map state, which is sufficient for arbitrary write or control-flow hijacking in the kernel.\nA:H - Triggering the dangling tagset access can cause kernel oops/panic even without full exploitation, so availability impact is high." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "block/blk-mq.c" ], "versions": [ { "version": "b6e68ee82585f2ee890b0a897a6aacbf49a467bb", "lessThan": "460aa288c5cd0544dcf933a2f0ad0e8c6d2d35ff", "status": "affected", "versionType": "git" }, { "version": "b6e68ee82585f2ee890b0a897a6aacbf49a467bb", "lessThan": "b140bac470b4f707cda59c7266214246238661df", "status": "affected", "versionType": "git" }, { "version": "b6e68ee82585f2ee890b0a897a6aacbf49a467bb", "lessThan": "70fdd922c7bf8949f8df109cf2635dff64c90392", "status": "affected", "versionType": "git" }, { "version": "b6e68ee82585f2ee890b0a897a6aacbf49a467bb", "lessThan": "5d05426e2d5fd7df8afc866b78c36b37b00188b7", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "block/blk-mq.c" ], "versions": [ { "version": "5.12", "status": "affected" }, { "version": "0", "lessThan": "5.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.47", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17.15", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18.4", "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": "5.12", "versionEndExcluding": "5.15.47" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "5.17.15" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "5.18.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "5.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/460aa288c5cd0544dcf933a2f0ad0e8c6d2d35ff" }, { "url": "https://git.kernel.org/stable/c/b140bac470b4f707cda59c7266214246238661df" }, { "url": "https://git.kernel.org/stable/c/70fdd922c7bf8949f8df109cf2635dff64c90392" }, { "url": "https://git.kernel.org/stable/c/5d05426e2d5fd7df8afc866b78c36b37b00188b7" } ], "title": "blk-mq: don't touch ->tagset in blk_mq_get_sq_hctx", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2022-49377", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-02-27T18:16:30.402440Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-27T18:22:33.551Z" } } ] } }