{"api_version":"1","generated_at":"2026-09-14T03:10:43+00:00","cve":"CVE-2026-80967","urls":{"html":"https://cve.report/CVE-2026-80967","api":"https://cve.report/api/cve/CVE-2026-80967.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80967","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80967"},"summary":{"title":"ALSA: pcxhr: initialize mutexes before requesting threaded IRQ","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-11 20:19:02","updated_at":"2026-09-13 07:17:03"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"8.4","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"8.4","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":8.4,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/6c97817e20598e5473094e0e38d1f51f1cf4dfff","name":"https://git.kernel.org/stable/c/6c97817e20598e5473094e0e38d1f51f1cf4dfff","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c069b3cfd753d6688ea0271c43553631ab38ce10","name":"https://git.kernel.org/stable/c/c069b3cfd753d6688ea0271c43553631ab38ce10","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7cf280fbef5db6310e1b32074c8c34d1ba459796","name":"https://git.kernel.org/stable/c/7cf280fbef5db6310e1b32074c8c34d1ba459796","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7ef9ad82d95dd3c74570d80a689a0570fbc7539e","name":"https://git.kernel.org/stable/c/7ef9ad82d95dd3c74570d80a689a0570fbc7539e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80967","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80967","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9bef72bdb26e291d6dffb04768741a0e49582666 c069b3cfd753d6688ea0271c43553631ab38ce10 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9bef72bdb26e291d6dffb04768741a0e49582666 7ef9ad82d95dd3c74570d80a689a0570fbc7539e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9bef72bdb26e291d6dffb04768741a0e49582666 7cf280fbef5db6310e1b32074c8c34d1ba459796 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9bef72bdb26e291d6dffb04768741a0e49582666 6c97817e20598e5473094e0e38d1f51f1cf4dfff git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.109 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.50 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80967","cve":"CVE-2026-80967","epss":"0.001820000","percentile":"0.079590000","score_date":"2026-09-13","updated_at":"2026-09-14 00:18:01"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["sound/pci/pcxhr/pcxhr.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c069b3cfd753d6688ea0271c43553631ab38ce10","status":"affected","version":"9bef72bdb26e291d6dffb04768741a0e49582666","versionType":"git"},{"lessThan":"7ef9ad82d95dd3c74570d80a689a0570fbc7539e","status":"affected","version":"9bef72bdb26e291d6dffb04768741a0e49582666","versionType":"git"},{"lessThan":"7cf280fbef5db6310e1b32074c8c34d1ba459796","status":"affected","version":"9bef72bdb26e291d6dffb04768741a0e49582666","versionType":"git"},{"lessThan":"6c97817e20598e5473094e0e38d1f51f1cf4dfff","status":"affected","version":"9bef72bdb26e291d6dffb04768741a0e49582666","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["sound/pci/pcxhr/pcxhr.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.18"},{"lessThan":"3.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.109","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.50","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.109","versionStartIncluding":"3.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.50","versionStartIncluding":"3.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","versionStartIncluding":"3.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"3.18","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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":{"baseScore":8.4,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"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."}]}],"providerMetadata":{"dateUpdated":"2026-09-13T06:28:35.942Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80967","datePublished":"2026-09-11T19:42:31.811Z","dateReserved":"2026-08-26T14:34:25.810Z","dateUpdated":"2026-09-13T06:28:35.942Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-11 20:19:02","lastModifiedDate":"2026-09-13 07:17:03","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.5,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80967","Ordinal":"1","Title":"ALSA: pcxhr: initialize mutexes before requesting threaded IRQ","CVE":"CVE-2026-80967","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80967","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"ALSA: pcxhr: initialize mutexes before requesting threaded IRQ"}]}}}