{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49291", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T01:49:39.302Z", "datePublished": "2025-02-26T01:56:27.986Z", "dateUpdated": "2026-08-05T08:54:39.261Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:54:39.261Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: pcm: Fix races among concurrent hw_params and hw_free calls\n\nCurrently we have neither proper check nor protection against the\nconcurrent calls of PCM hw_params and hw_free ioctls, which may result\nin a UAF. Since the existing PCM stream lock can't be used for\nprotecting the whole ioctl operations, we need a new mutex to protect\nthose racy calls.\n\nThis patch introduced a new mutex, runtime->buffer_mutex, and applies\nit to both hw_params and hw_free ioctl code paths. Along with it, the\nboth functions are slightly modified (the mmap_count check is moved\ninto the state-check block) for code simplicity." } ], "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 - Reached via local ALSA PCM character-device ioctls (SNDRV_PCM_IOCTL_HW_PARAMS/HW_FREE) on /dev/snd/pcm*; not network-facing packet processing.\nAC:L - The attacker controls both sides of the race by issuing concurrent hw_params and hw_free ioctls from multiple threads on the same PCM fd; no conditions outside attacker control are required.\nPR:L - Any unprivileged local user who can open a PCM device (audio group, logind seat ACL, or equivalent) can trigger the ioctls; there are no capability checks on this path.\nUI:N - Exploitation requires only the attacker's own open and ioctl calls; no action by another user is needed.\nS:U - Impact is confined to the host kernel privilege boundary (local privilege escalation / DoS); it does not cross a VM, IOMMU, or other security authority.\nC:H - The race yields a use-after-free of the PCM DMA buffer (dma_buffer_p/dma_area), which can be reused to obtain arbitrary kernel read primitives.\nI:H - The same UAF enables heap reuse and write primitives that can hijack control flow, matching the documented privilege-escalation impact.\nA:H - Use-after-free of kernel DMA buffer structures can cause kernel oops/panic even when not fully exploited for code execution." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/sound/pcm.h", "sound/core/pcm.c", "sound/core/pcm_native.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a42aa926843acca96c0dfbde2e835b8137f2f092", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9cb6c40a6ebe4a0cfc9d6a181958211682cffea9", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "fbeb492694ce0441053de57699e1e2b7bc148a69", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0f6947f5f5208f6ebd4d76a82a4757e2839a23f8", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "33061d0fba51d2bf70a2ef9645f703c33fe8e438", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0090c13cbbdffd7da079ac56f80373a9a1be0bf8", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "1bbf82d9f961414d6c76a08f7f843ea068e0ab7b", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "92ee3c60ec9fe64404dc035e7c41277d74aa26cb", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/sound/pcm.h", "sound/core/pcm.c", "sound/core/pcm_native.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.279", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.243", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.193", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.109", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.32", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16.18", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17.1", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18", "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": "2.6.12", "versionEndExcluding": "4.14.279" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "4.19.243" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.4.193" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.10.109" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.32" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.16.18" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.17.1" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.18" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/a42aa926843acca96c0dfbde2e835b8137f2f092" }, { "url": "https://git.kernel.org/stable/c/9cb6c40a6ebe4a0cfc9d6a181958211682cffea9" }, { "url": "https://git.kernel.org/stable/c/fbeb492694ce0441053de57699e1e2b7bc148a69" }, { "url": "https://git.kernel.org/stable/c/0f6947f5f5208f6ebd4d76a82a4757e2839a23f8" }, { "url": "https://git.kernel.org/stable/c/33061d0fba51d2bf70a2ef9645f703c33fe8e438" }, { "url": "https://git.kernel.org/stable/c/0090c13cbbdffd7da079ac56f80373a9a1be0bf8" }, { "url": "https://git.kernel.org/stable/c/1bbf82d9f961414d6c76a08f7f843ea068e0ab7b" }, { "url": "https://git.kernel.org/stable/c/92ee3c60ec9fe64404dc035e7c41277d74aa26cb" } ], "title": "ALSA: pcm: Fix races among concurrent hw_params and hw_free calls", "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-2022-49291", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-02-27T17:58:45.856077Z" } } } ], "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": "2025-02-27T18:02:29.053Z" } } ] } }