{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-53242", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.393Z", "datePublished": "2026-06-25T08:39:37.129Z", "dateUpdated": "2026-09-02T12:49:37.764Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-02T12:49:37.764Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: PCM: Fix wait queue list corruption in snd_pcm_drain() on linked streams\n\nsnd_pcm_drain() uses init_waitqueue_entry which does not clear\nentry.prev/next, and add_wait_queue with a conditional\nremove_wait_queue that is skipped when to_check is no longer\nin the group after concurrent UNLINK. The orphaned wait entry\nremains on the unlinked substream sleep queue. On the next\ndrain iteration, add_wait_queue adds the entry to a new queue\nwhile still linked on the old one, corrupting both lists. A\nsubsequent wake_up dereferences NULL at the func pointer\n(mapped from the spinlock at offset 0 of the misinterpreted\nwait_queue_head_t), causing a kernel panic.\n\nReplace init_waitqueue_entry/add_wait_queue/conditional\nremove_wait_queue with init_wait_entry/prepare_to_wait/\nfinish_wait. init_wait_entry clears prev/next via\nINIT_LIST_HEAD on each iteration and sets\nautoremove_wake_function which auto-removes the entry on\nwake-up. finish_wait safely handles both the already-removed\nand still-queued cases." } ], "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 vulnerable code is reached from local userspace through ALSA PCM character-device ioctls such as SNDRV_PCM_IOCTL_LINK, SNDRV_PCM_IOCTL_UNLINK, and SNDRV_PCM_IOCTL_DRAIN. It is not reachable by remote network packets or adjacent/physical protocols.\nAC:L - The bug is a race, but the attacker can control both sides by using multiple PCM file descriptors/threads to link streams, block in drain, and concurrently unlink. No condition outside attacker control is required once suitable PCM devices are accessible.\nPR:L - No kernel capability check gates the vulnerable ioctl path, but the attacker needs local access to open ALSA PCM device nodes. That corresponds to a basic unprivileged local user with device access, not real root/admin privileges.\nUI:N - Exploitation is driven entirely by the attacker's own ioctl calls on opened PCM file descriptors. No victim user action is required.\nS:U - The vulnerability is in the kernel ALSA subsystem and affects kernel resources under the same security authority. It is not a VM escape, IOMMU bypass, or other cross-scope boundary violation.\nC:H - The documented failure is a panic, but the primitive is kernel wait-queue list corruption with an orphaned stack wait entry and cross-queue linkage under attacker-controlled timing. Under the higher-severity rule, this memory corruption is treated as potentially usable for kernel memory disclosure.\nI:H - The bug corrupts kernel wait-queue list pointers and can leave stale wait entries reachable by later wakeups. Although the observed path dereferences a NULL function pointer, this is kernel memory corruption plausibly usable for control-flow or privilege-impacting writes, so integrity is High.\nA:H - A subsequent wake_up can dereference a NULL/misinterpreted wait-queue function pointer and panic the kernel. This is a reliable high availability impact." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "sound/core/pcm_native.c" ], "versions": [ { "version": "9baee36e8c5443411c4629afabafaff8a46a23fd", "lessThan": "cac5bf3500ee6422cf64e0df0b5daeecfed42917", "status": "affected", "versionType": "git" }, { "version": "f2cb2e0d27fb925c73a78f0ce7d6dbf68d3747c1", "lessThan": "06eca2235a3fd281dddf25b0a97772b25b5bb573", "status": "affected", "versionType": "git" }, { "version": "fc71f888994569f87d5bee20b1ac6c9c1e3a7a79", "lessThan": "d842f26a167e77a36f3ed333b9fa99d36ef99fe6", "status": "affected", "versionType": "git" }, { "version": "629cf09464cf98670996ea5c191dc9743e6f3f00", "lessThan": "d68b621bb5a48051932f1017a6e1bc9b18f854d0", "status": "affected", "versionType": "git" }, { "version": "ae8f8d30d334bad5b1b3cdb1eb8a0b771f55e432", "lessThan": "b053fcd8912f06c30f932f5b8ec41c72de474695", "status": "affected", "versionType": "git" }, { "version": "4a758e9a1f5ed722f83c4dd35f867fe811553bcb", "lessThan": "cd98837db15f323463b8df07282ac723bd5c3fed", "status": "affected", "versionType": "git" }, { "version": "9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6", "lessThan": "7c71a9522555ff137a9ca36b15d759ca04d84788", "status": "affected", "versionType": "git" }, { "version": "9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6", "lessThan": "88fe2e3658726cb21ff2dcf9770bf672f9b9d31b", "status": "affected", "versionType": "git" }, { "version": "c2f64e05a0587a83ec42dbd6b7a7ded79b2ff694", "status": "affected", "versionType": "git" }, { "version": "5.10.253", "lessThan": "5.10.259", "status": "affected", "versionType": "semver" }, { "version": "6.1.167", "lessThan": "6.1.176", "status": "affected", "versionType": "semver" }, { "version": "6.6.130", "lessThan": "6.6.143", "status": "affected", "versionType": "semver" }, { "version": "6.12.78", "lessThan": "6.12.94", "status": "affected", "versionType": "semver" }, { "version": "6.18.19", "lessThan": "6.18.36", "status": "affected", "versionType": "semver" }, { "version": "6.19.9", "lessThan": "6.20", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "sound/core/pcm_native.c" ], "versions": [ { "version": "7.0", "status": "affected" }, { "version": "0", "lessThan": "7.0", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.94", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.36", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.13", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "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": "5.10.253", "versionEndExcluding": "5.10.259" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.167", "versionEndExcluding": "6.1.176" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.130", "versionEndExcluding": "6.6.143" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.78", "versionEndExcluding": "6.12.94" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18.19", "versionEndExcluding": "6.18.36" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.0.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.1" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19.9" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/cac5bf3500ee6422cf64e0df0b5daeecfed42917" }, { "url": "https://git.kernel.org/stable/c/06eca2235a3fd281dddf25b0a97772b25b5bb573" }, { "url": "https://git.kernel.org/stable/c/d842f26a167e77a36f3ed333b9fa99d36ef99fe6" }, { "url": "https://git.kernel.org/stable/c/d68b621bb5a48051932f1017a6e1bc9b18f854d0" }, { "url": "https://git.kernel.org/stable/c/b053fcd8912f06c30f932f5b8ec41c72de474695" }, { "url": "https://git.kernel.org/stable/c/cd98837db15f323463b8df07282ac723bd5c3fed" }, { "url": "https://git.kernel.org/stable/c/7c71a9522555ff137a9ca36b15d759ca04d84788" }, { "url": "https://git.kernel.org/stable/c/88fe2e3658726cb21ff2dcf9770bf672f9b9d31b" } ], "title": "ALSA: PCM: Fix wait queue list corruption in snd_pcm_drain() on linked streams", "x_generator": { "engine": "bippy-1.2.0" } } } }