{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-80967", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.810Z", "datePublished": "2026-09-11T19:42:31.811Z", "dateUpdated": "2026-10-19T08:45:52.076Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:45:52.076Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: pcxhr: initialize mutexes before requesting threaded IRQ\n\npcxhr_probe() requests pcxhr_threaded_irq() before initializing\nmgr->lock, even though the threaded handler takes that mutex.\n\nInitialize the manager locks before request_threaded_irq() so an\nearly interrupt cannot run against uninitialized mutex state during\nprobe." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The flaw is reached only from snd-pcxhr PCI probe (pcxhr_probe() -> request_threaded_irq() -> pcxhr_threaded_irq()) on a locally attached Digigram PCXHR board; studio, broadcast, and embedded audio systems enumerate that card at boot or udev bind, which is a local PCI probe path, not a network or USB protocol path.\nAC:L - pcxhr_probe() never masks PLX doorbell IRQs before request_threaded_irq(), so leftover or device-asserted PCXHR_IRQCS_ACTIVE_PCIDB plus TIMER/MASK bits wake pcxhr_threaded_irq() immediately; on preemptible kernels that handler preempts probe before mutex_init(), so the attacker does not depend on an uncontrollable race.\nPR:N - pcxhr_probe() performs no capability or authentication checks; when matching PCI hardware is present, kernel enumeration/udev runs the vulnerable request_threaded_irq() sequence automatically without an OS account or user-namespace privilege.\nUI:N - The uninitialized mutex is taken in the threaded IRQ during automatic PCI probe; no victim must open ALSA device nodes, load firmware, or otherwise interact.\nS:U - Uninitialized-mutex use and the follow-on NULL mgr->prmh dereference occur inside the host kernel pcxhr driver and do not cross a VM, container, or IOMMU security boundary.\nC:H - pcxhr_threaded_irq() takes uninitialized mgr->lock (and pcxhr_msg_thread() may take uninitialized mgr->msg_lock) with a zeroed wait_list, then reads through NULL mgr->prmh; that uninitialized-lock/IRQ-thread memory-safety failure can disclose kernel memory rather than a small bounded leak.\nI:H - Probe can mutex_init() mgr->lock while the IRQ thread still holds the zeroed mutex, and pcxhr_init_rmh() writes through NULL prmh; that lock-state corruption and invalid kernel write are exploitable memory-corruption/control-flow primitives, not a pure crash.\nA:H - Locking an uninitialized mutex, DEBUG_MUTEXES checks, and NULL dereference of mgr->prmh in pcxhr_msg_thread() cause a kernel oops or panic during probe, fully denying availability." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "sound/pci/pcxhr/pcxhr.c" ], "versions": [ { "version": "9bef72bdb26e291d6dffb04768741a0e49582666", "lessThan": "039602d6ddb1febbb0561b30dab04461f78a1319", "status": "affected", "versionType": "git" }, { "version": "9bef72bdb26e291d6dffb04768741a0e49582666", "lessThan": "a5f405adb0229c9cf64eb3d695c333c92e3d3d4f", "status": "affected", "versionType": "git" }, { "version": "9bef72bdb26e291d6dffb04768741a0e49582666", "lessThan": "ede25b7fea0d7487ee8528bf35dc7b9a1cbcd814", "status": "affected", "versionType": "git" }, { "version": "9bef72bdb26e291d6dffb04768741a0e49582666", "lessThan": "c069b3cfd753d6688ea0271c43553631ab38ce10", "status": "affected", "versionType": "git" }, { "version": "9bef72bdb26e291d6dffb04768741a0e49582666", "lessThan": "7ef9ad82d95dd3c74570d80a689a0570fbc7539e", "status": "affected", "versionType": "git" }, { "version": "9bef72bdb26e291d6dffb04768741a0e49582666", "lessThan": "7cf280fbef5db6310e1b32074c8c34d1ba459796", "status": "affected", "versionType": "git" }, { "version": "9bef72bdb26e291d6dffb04768741a0e49582666", "lessThan": "6c97817e20598e5473094e0e38d1f51f1cf4dfff", "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/pci/pcxhr/pcxhr.c" ], "versions": [ { "version": "3.18", "status": "affected" }, { "version": "0", "lessThan": "3.18", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "3.18", "versionEndExcluding": "5.15.221" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.1.188" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.6.157" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.12.109" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.18.50" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "7.2.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/039602d6ddb1febbb0561b30dab04461f78a1319" }, { "url": "https://git.kernel.org/stable/c/a5f405adb0229c9cf64eb3d695c333c92e3d3d4f" }, { "url": "https://git.kernel.org/stable/c/ede25b7fea0d7487ee8528bf35dc7b9a1cbcd814" }, { "url": "https://git.kernel.org/stable/c/c069b3cfd753d6688ea0271c43553631ab38ce10" }, { "url": "https://git.kernel.org/stable/c/7ef9ad82d95dd3c74570d80a689a0570fbc7539e" }, { "url": "https://git.kernel.org/stable/c/7cf280fbef5db6310e1b32074c8c34d1ba459796" }, { "url": "https://git.kernel.org/stable/c/6c97817e20598e5473094e0e38d1f51f1cf4dfff" } ], "title": "ALSA: pcxhr: initialize mutexes before requesting threaded IRQ", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-80967", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-10-16T19:21:30.969232Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:26:36.758Z" } } ] } }