{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49292", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T01:49:39.302Z", "datePublished": "2025-02-26T01:56:28.552Z", "dateUpdated": "2026-08-05T08:54:40.337Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:54:40.337Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: oss: Fix PCM OSS buffer allocation overflow\n\nWe've got syzbot reports hitting INT_MAX overflow at vmalloc()\nallocation that is called from snd_pcm_plug_alloc(). Although we\napply the restrictions to input parameters, it's based only on the\nhw_params of the underlying PCM device. Since the PCM OSS layer\nallocates a temporary buffer for the data conversion, the size may\nbecome unexpectedly large when more channels or higher rates is given;\nin the reported case, it went over INT_MAX, hence it hits WARN_ON().\n\nThis patch is an attempt to avoid such an overflow and an allocation\nfor too large buffers. First off, it adds the limit of 1MB as the\nupper bound for period bytes. This must be large enough for all use\ncases, and we really don't want to handle a larger temporary buffer\nthan this size. The size check is performed at two places, where the\noriginal period bytes is calculated and where the plugin buffer size\nis calculated.\n\nIn addition, the driver uses array_size() and array3_size() for\nmultiplications to catch overflows for the converted period size and\nbuffer bytes." } ], "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 vulnerability is reached via open/ioctl/read/write on the local OSS PCM device nodes (/dev/dsp*), not via network packets or adjacent-link protocols.\nAC:L - An attacker who can open the OSS PCM device can reliably set high rates/channels/fragment parameters through SNDCTL_DSP_* ioctls and trigger snd_pcm_oss_change_params → snd_pcm_plug_alloc without depending on races or external state.\nPR:L - Exploitation requires only an unprivileged local account able to open the OSS PCM device (typically audio-group access); the open/ioctl path performs no capability checks and does not require root.\nUI:N - The attacker triggers the bug entirely through their own open/ioctl/I/O operations; no separate victim action is required.\nS:U - Impact is confined to the host kernel's memory/availability; this is standard local kernel memory corruption/DoS, not a VM/IOMMU/sandbox boundary crossing.\nC:H - Integer overflow in snd_pcm_plugin_alloc can wrap the allocation size so kvzalloc returns an undersized plugin buffer while buf_frames stays large, enabling heap out-of-bounds access that can be leveraged for arbitrary kernel memory disclosure.\nI:H - The same undersized plugin/OSS conversion buffer is written during format/rate/channel plugin transfers, producing a heap out-of-bounds write primitive that can be abused for corruption and code execution.\nA:H - Oversized non-wrapping sizes hit WARN_ON_ONCE(size > INT_MAX) in kvmalloc_node (panic_on_warn → crash), and the heap corruption path can also oops/panic the kernel." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "sound/core/oss/pcm_oss.c", "sound/core/oss/pcm_plugin.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a63af1baf0a5e11827db60e3127f87e437cab6e5", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0c4190b41a69990666b4000999e27f8f1b2a426b", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "5ce74ff7059341d8b2f4d01c3383491df63d1898", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "7a40cbf3579a8e14849ba7ce46309c1992658d2b", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "fb08bf99195a87c798bc8ae1357337a981faeade", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "e74a069c6a7bb505f3ade141dddf85f4b0b5145a", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "efb6402c3c4a7c26d97c92d70186424097b6e366", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "sound/core/oss/pcm_oss.c", "sound/core/oss/pcm_plugin.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.237", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.188", "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": "4.19.237" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.4.188" }, { "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/a63af1baf0a5e11827db60e3127f87e437cab6e5" }, { "url": "https://git.kernel.org/stable/c/0c4190b41a69990666b4000999e27f8f1b2a426b" }, { "url": "https://git.kernel.org/stable/c/5ce74ff7059341d8b2f4d01c3383491df63d1898" }, { "url": "https://git.kernel.org/stable/c/7a40cbf3579a8e14849ba7ce46309c1992658d2b" }, { "url": "https://git.kernel.org/stable/c/fb08bf99195a87c798bc8ae1357337a981faeade" }, { "url": "https://git.kernel.org/stable/c/e74a069c6a7bb505f3ade141dddf85f4b0b5145a" }, { "url": "https://git.kernel.org/stable/c/efb6402c3c4a7c26d97c92d70186424097b6e366" } ], "title": "ALSA: oss: Fix PCM OSS buffer allocation overflow", "x_generator": { "engine": "bippy-1.2.0" } } } }