CVE-2026-64481

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With firmware_autostart\ndisabled, a firmware load can be requested before the DSP has been\ninitialized. If the component or device is removed before the queued\nwork runs, the worker can run after teardown and dereference driver\nstate that is no longer valid.\n\nTrack the created controls and remove them on unbind so no new control\ncallback can reach the driver data or queue more work. Then cancel\nfw_load_work to drain any request that was already queued. Also cancel\nthe work unconditionally during device remove before runtime PM teardown."}], "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 - An attacker reaches the vulnerable callbacks through ALSA control ioctls on /dev/snd/controlC*. No network or physical protocol directly exposes this path.\nAC:L - After teardown, stale controls can repeatedly dereference the freed object or queue its embedded work item, so exploitation does not require winning a narrow race. A queued work_struct also remains directly usable after its containing allocation is freed.\nPR:L - An unprivileged user with ordinary audio-device access can invoke the control callbacks. The ioctl path contains no capability, namespace, or administrative privilege check.\nUI:N - Exploitation requires no victim to open content or perform an interactive action.\nS:U - The vulnerable driver and the affected kernel resources are governed by the same kernel security authority.\nC:H - The heap use-after-free permits attacker-influenced reuse and disclosure of freed kernel object contents, potentially supporting arbitrary kernel memory reads.\nI:H - The freed object embeds mutable workqueue list state and a function pointer that is subsequently invoked, making kernel memory corruption and control-flow hijacking defensible.\nA:H - Stale control accesses or corrupted queued work can cause a kernel oops, panic, or workqueue corruption, resulting in complete system unavailability."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": 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The ioctl path contains no capability, namespace, or administrative privilege check.\nUI:N - Exploitation requires no victim to open content or perform an interactive action.\nS:U - The vulnerable driver and the affected kernel resources are governed by the same kernel security authority.\nC:H - The heap use-after-free permits attacker-influenced reuse and disclosure of freed kernel object contents, potentially supporting arbitrary kernel memory reads.\nI:H - The freed object embeds mutable workqueue list state and a function pointer that is subsequently invoked, making kernel memory corruption and control-flow hijacking defensible.\nA:H - Stale control accesses or corrupted queued work can cause a kernel oops, panic, or workqueue corruption, resulting in complete system unavailability."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8", "lessThan": "3e339c88b8c3044919fd1936a8b23124285d0de6", "versionType": "git"}, {"status": "affected", "version": "47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8", "lessThan": "8947215c0136c9d905e4a46d824824f8b48a2e5b", "versionType": "git"}, {"status": "affected", "version": "47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8", "lessThan": "ce0a903d0591e3e2c790c5b628802b08d1b287cc", "versionType": "git"}, {"status": "affected", "version": "47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8", "lessThan": "d6a40a4d083ef74d00c8f9516cb5ff07ac70720b", "versionType": "git"}, {"status": "affected", "version": "47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8", "lessThan": "b65020d5398f499c09498c9786dba6d67ae57664", "versionType": "git"}], "programFiles": ["sound/hda/codecs/side-codecs/cs35l41_hda.c", "sound/hda/codecs/side-codecs/cs35l41_hda.h"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"status": "unaffected", "version": "0", "lessThan": "6.0", "versionType": "semver"}, {"status": "unaffected", "version": "6.6.160", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.39", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.4", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["sound/hda/codecs/side-codecs/cs35l41_hda.c", "sound/hda/codecs/side-codecs/cs35l41_hda.h"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/3e339c88b8c3044919fd1936a8b23124285d0de6"}, {"url": "https://git.kernel.org/stable/c/8947215c0136c9d905e4a46d824824f8b48a2e5b"}, {"url": "https://git.kernel.org/stable/c/ce0a903d0591e3e2c790c5b628802b08d1b287cc"}, {"url": "https://git.kernel.org/stable/c/d6a40a4d083ef74d00c8f9516cb5ff07ac70720b"}, {"url": "https://git.kernel.org/stable/c/b65020d5398f499c09498c9786dba6d67ae57664"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: hda/cs35l41: Fix firmware load work teardown\n\ncs35l41_hda creates ALSA controls whose private data points at the\ncs35l41_hda object. 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The firmware load control can also queue\nfw_load_work.\n\nThose controls are not removed on component unbind, and device remove\nonly cancels fw_load_work through cs35l41_remove_dsp(). That helper is\nskipped when halo_initialized is false. With firmware_autostart\ndisabled, a firmware load can be requested before the DSP has been\ninitialized. If the component or device is removed before the queued\nwork runs, the worker can run after teardown and dereference driver\nstate that is no longer valid.\n\nTrack the created controls and remove them on unbind so no new control\ncallback can reach the driver data or queue more work. Then cancel\nfw_load_work to drain any request that was already queued. Also cancel\nthe work unconditionally during device remove before runtime PM teardown."}], "id": "CVE-2026-64481", "lastModified": "2026-11-12T20:51:40.630", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64481", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:41:19.470343Z", "version": "2.0.3"}}]}, "published": "2026-07-25T10:17:33.733", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3e339c88b8c3044919fd1936a8b23124285d0de6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8947215c0136c9d905e4a46d824824f8b48a2e5b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b3647e5b7b817272fdef057948c37fcb0704edc7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b65020d5398f499c09498c9786dba6d67ae57664"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ce0a903d0591e3e2c790c5b628802b08d1b287cc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d6a40a4d083ef74d00c8f9516cb5ff07ac70720b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: ALSA: hda/cs35l41: Fix firmware load work teardown", "id": "2507038", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507038"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's ALSA sound driver for the cs35l41 component. This vulnerability occurs because the driver fails to properly remove controls and cancel firmware load work during component unbinding or device removal, especially when firmware autostart is disabled. This can lead to a worker attempting to access driver data that is no longer valid after teardown, resulting in memory corruption. An attacker with local access could potentially exploit this to cause a denial of service or escalate privileges."], "name": "CVE-2026-64481", "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64481\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64481\nhttps://lore.kernel.org/linux-cve-announce/2026072548-CVE-2026-64481-d8df@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8,8947215c0136c9d905e4a46d824824f8b48a2e5b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8,ce0a903d0591e3e2c790c5b628802b08d1b287cc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8,d6a40a4d083ef74d00c8f9516cb5ff07ac70720b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8,b65020d5398f499c09498c9786dba6d67ae57664)"}}], "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": "6.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"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": "semver", "value": "[7.2-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": "2026-07-25T20:30:02.956467+00:00", "updated": "2026-10-20T09:30:12.543185+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}