CVE-2026-80967

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"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": "20a0f80f67a1495a57e5a3ba0fa172a0f919691d", "status": "affected", "versionType": "git"}, {"version": "9bef72bdb26e291d6dffb04768741a0e49582666", "lessThan": "039602d6ddb1febbb0561b30dab04461f78a1319", "status": "affected", "versionType": "git"}, {"version": "9bef72bdb26e291d6dffb04768741a0e49582666", "lessThan": "a5f405adb0229c9cf64eb3d695c333c92e3d3d4f", "status": "affected", "versionType": "git"}, {"version": "9bef72bdb26e291d6dffb04768741a0e49582666", "lessThan": "ede25b7fea0d7487ee8528bf35dc7b9a1cbcd814", "status": "affected", "versionType": "git"}, 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"lessThanOrEqual": "5.10.*", "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", 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"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/20a0f80f67a1495a57e5a3ba0fa172a0f919691d"}, {"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"}}]}}

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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": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "9bef72bdb26e291d6dffb04768741a0e49582666", 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"version": "7.3", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["sound/pci/pcxhr/pcxhr.c"], "defaultStatus": "affected"}], "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"}], "x_generator": {"engine": "bippy-1.2.0"}, "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."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.221", "versionStartIncluding": "3.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.188", "versionStartIncluding": "3.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.157", "versionStartIncluding": "3.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.109", "versionStartIncluding": "3.18"}, {"criteria": 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"5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "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", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-80967", "lastModified": "2026-10-30T13:20:14.423", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-80967", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T19:21:30.969232Z", "version": "2.0.3"}}]}, "published": "2026-09-11T20:19:02.720", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/039602d6ddb1febbb0561b30dab04461f78a1319"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/20a0f80f67a1495a57e5a3ba0fa172a0f919691d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6c97817e20598e5473094e0e38d1f51f1cf4dfff"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7cf280fbef5db6310e1b32074c8c34d1ba459796"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7ef9ad82d95dd3c74570d80a689a0570fbc7539e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a5f405adb0229c9cf64eb3d695c333c92e3d3d4f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c069b3cfd753d6688ea0271c43553631ab38ce10"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ede25b7fea0d7487ee8528bf35dc7b9a1cbcd814"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux Kernel: ALSA pcxhr driver uninitialized mutex can lead to system instability", "id": "2532200", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532200"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-909", "details": ["A flaw was found in the ALSA pcxhr driver within the Linux kernel. The `pcxhr_probe()` function requests a threaded interrupt before properly initializing a critical mutex (`mgr->lock`). This oversight could allow an early interrupt to operate on an uninitialized mutex, potentially leading to system instability or a denial of service (DoS) condition. A local attacker could potentially exploit this to impact system availability."], "name": "CVE-2026-80967", "public_date": "2026-09-11T19:42:31Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80967\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80967\nhttps://git.kernel.org/stable/c/6c97817e20598e5473094e0e38d1f51f1cf4dfff\nhttps://git.kernel.org/stable/c/7cf280fbef5db6310e1b32074c8c34d1ba459796\nhttps://git.kernel.org/stable/c/7ef9ad82d95dd3c74570d80a689a0570fbc7539e\nhttps://git.kernel.org/stable/c/c069b3cfd753d6688ea0271c43553631ab38ce10"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9bef72bdb26e291d6dffb04768741a0e49582666,c069b3cfd753d6688ea0271c43553631ab38ce10)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9bef72bdb26e291d6dffb04768741a0e49582666,7ef9ad82d95dd3c74570d80a689a0570fbc7539e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9bef72bdb26e291d6dffb04768741a0e49582666,7cf280fbef5db6310e1b32074c8c34d1ba459796)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9bef72bdb26e291d6dffb04768741a0e49582666,6c97817e20598e5473094e0e38d1f51f1cf4dfff)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "3.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,3.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T02:15:06.471382+00:00", "updated": "2026-09-21T02:30:08.202388+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}