CVE-2026-64601

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64601", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.799Z", "datePublished": "2026-08-06T07:13:53.926Z", "dateUpdated": "2026-08-17T04:58:24.207Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:58:24.207Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: us144mkii: capture_urb_complete: redundant usb_anchor_urb corrupts anchor list on each resubmission\n\nIn capture_urb_complete(), usb_anchor_urb() is called on every\ncompletion callback, but the URB is already anchored from the\ninitial submission in tascam_trigger_start(). Each redundant call\ncorrupts the anchor's doubly-linked list and inflates the URB\nrefcount. When usb_kill_anchored_urbs() traverses the list during\nstream stop / suspend / disconnect, the corrupted list leads to\nuse-after-free.\n\nRemove the redundant usb_anchor_urb() from the resubmit path."}], "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 bug is reached through local ALSA PCM open/ioctl paths on /dev/snd/pcmC*D* (START/STOP via tascam_pcm_trigger), not via network protocols; a present TASCAM US-144/US-144MKII is a deployment prerequisite, and Local is chosen over Physical under the uncertainty rule.\nAC:L - An attacker who can open the PCM device can deterministically start capture (submitting URBs that complete and hit capture_urb_complete), then stop/suspend to invoke usb_kill_anchored_urbs on the corrupted anchor; no conditions outside attacker control are required.\nPR:L - The PCM path has no capability checks; ordinary local access to ALSA device nodes (audio group or seat/udev ACLs on studio/desktop systems with this interface) is sufficient, not init-namespace root.\nUI:N - The attacker alone opens the PCM device, starts and stops the stream, and thereby triggers URB resubmission corruption and the subsequent kill/UAF path without any separate victim action.\nS:U - The use-after-free corrupts kernel USB/ALSA state within the same host kernel security authority and does not cross a VM, IOMMU, or other separate boundary.\nC:H - Corrupted usb_anchor list traversal during usb_kill_anchored_urbs yields a kernel use-after-free; per guidance UAF enables reclaim of freed objects and arbitrary kernel information disclosure.\nI:H - The same UAF on URB/anchor-linked objects can be turned into heap reuse and control-flow hijacking primitives, so integrity impact is High rather than a mere crash.\nA:H - Traversing the corrupted anchor list or under-referenced URB state during stream stop, suspend, or disconnect can oops/panic the kernel, giving 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/usb/usx2y/us144mkii_capture.c"], "versions": [{"version": "c1bb0c13e430623c26543baae5bb9ae21139db87", "lessThan": "16f14f55141d4c55c3f321f93c328fff7cd6860a", "status": "affected", "versionType": "git"}, {"version": "c1bb0c13e430623c26543baae5bb9ae21139db87", "lessThan": "ab1db64912428cdf06a4f9542e16e0575e9ad59f", "status": "affected", "versionType": "git"}, {"version": "c1bb0c13e430623c26543baae5bb9ae21139db87", "lessThan": "5cff1529a2f9b3461a7f5a6e36a86682fc290534", "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/usb/usx2y/us144mkii_capture.c"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "6.18", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/16f14f55141d4c55c3f321f93c328fff7cd6860a"}, {"url": "https://git.kernel.org/stable/c/ab1db64912428cdf06a4f9542e16e0575e9ad59f"}, {"url": "https://git.kernel.org/stable/c/5cff1529a2f9b3461a7f5a6e36a86682fc290534"}], "title": "ALSA: us144mkii: capture_urb_complete: redundant usb_anchor_urb corrupts anchor list on each resubmission", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["sound/usb/usx2y/us144mkii_capture.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "16f14f55141d4c55c3f321f93c328fff7cd6860a", "status": "affected", "version": "c1bb0c13e430623c26543baae5bb9ae21139db87", "versionType": "git"}, {"lessThan": "ab1db64912428cdf06a4f9542e16e0575e9ad59f", "status": "affected", "version": "c1bb0c13e430623c26543baae5bb9ae21139db87", "versionType": "git"}, {"lessThan": "5cff1529a2f9b3461a7f5a6e36a86682fc290534", "status": "affected", "version": "c1bb0c13e430623c26543baae5bb9ae21139db87", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["sound/usb/usx2y/us144mkii_capture.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.18"}, {"lessThan": "6.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.39", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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: us144mkii: capture_urb_complete: redundant usb_anchor_urb corrupts anchor list on each resubmission\n\nIn capture_urb_complete(), usb_anchor_urb() is called on every\ncompletion callback, but the URB is already anchored from the\ninitial submission in tascam_trigger_start(). Each redundant call\ncorrupts the anchor's doubly-linked list and inflates the URB\nrefcount. When usb_kill_anchored_urbs() traverses the list during\nstream stop / suspend / disconnect, the corrupted list leads to\nuse-after-free.\n\nRemove the redundant usb_anchor_urb() from the resubmit path."}], "id": "CVE-2026-64601", "lastModified": "2026-08-17T05:18:06.800", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-06T08:16:35.797", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/16f14f55141d4c55c3f321f93c328fff7cd6860a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5cff1529a2f9b3461a7f5a6e36a86682fc290534"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ab1db64912428cdf06a4f9542e16e0575e9ad59f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c1bb0c13e430623c26543baae5bb9ae21139db87,16f14f55141d4c55c3f321f93c328fff7cd6860a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c1bb0c13e430623c26543baae5bb9ae21139db87,ab1db64912428cdf06a4f9542e16e0575e9ad59f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c1bb0c13e430623c26543baae5bb9ae21139db87,5cff1529a2f9b3461a7f5a6e36a86682fc290534)"}}], "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": "6.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc2,*]"}}], "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": "2026-08-06T09:15:02.960848+00:00", "updated": "2026-08-08T16:45:03.726655+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}