CVE-2026-64243

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For the two-entry mux used by this\ndriver, valid values are 0 and 1, so value 2 must be rejected as well.\n\nAccepting e->items can store an invalid mux state, pass it to the GPIO\nsetter, and pass it on to the DAPM mux update path where it is used as\nan index into the enum text array.\n\nUse the same >= e->items check used by the ASoC enum helpers."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - An attacker reaches the flaw through SNDRV_CTL_IOCTL_ELEM_WRITE on the local ALSA control device; no network or physical-input path invokes this callback.\nAC:L - Supplying the single invalid enum value 2 directly triggers the vulnerable path on an affected non-hardened build, without a race or conditions outside the attacker\u2019s control.\nPR:L - The ioctl requires ordinary access to /dev/snd/controlC*, commonly granted to the active local user or audio group, and the kernel path performs no capability or namespace checks.\nUI:N - After obtaining control-device access, the attacker can issue the ioctl directly without any action by another user.\nS:U - The vulnerable ALSA driver and the resulting kernel impacts remain within the host kernel\u2019s security authority and do not cross a virtualization or IOMMU boundary.\nC:H - The invalid index performs an out-of-bounds pointer read and then dereferences that pointer through strcmp(); following the required conservative treatment of kernel out-of-bounds reads, confidentiality is scored High.\nI:N - There is no out-of-bounds write or attacker-controlled write primitive; value 2 is stored in-bounds and the GPIO layer normalizes it to the same Boolean state as valid value 1.\nA:H - The out-of-bounds text pointer commonly resolves to NULL or another invalid address and is dereferenced by strcmp(), causing a kernel oops and potentially a full panic on panic-on-oops systems."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["sound/soc/codecs/simple-mux.c"], "versions": [{"version": "342fbb7578d1741ff646d7b08e14e8753267b9fa", "lessThan": "6fb653b62f169f6050fac45b56bf21ad097e19f6", "status": "affected", "versionType": "git"}, {"version": "342fbb7578d1741ff646d7b08e14e8753267b9fa", "lessThan": "d8cc3e747b002a8b965c529de79c0654675b9a1a", "status": "affected", "versionType": "git"}, {"version": "342fbb7578d1741ff646d7b08e14e8753267b9fa", "lessThan": "5fe860af8630cf7c78523cbd68e5a234743585aa", "status": "affected", "versionType": "git"}, {"version": "342fbb7578d1741ff646d7b08e14e8753267b9fa", "lessThan": "2ff3ac6f7664fe5639cad01712ac5e021fa7939c", "status": "affected", "versionType": "git"}, {"version": "342fbb7578d1741ff646d7b08e14e8753267b9fa", "lessThan": "164dcbec9632ca93ae313e6da6e4e05584fa0f02", "status": "affected", 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following the required conservative treatment of kernel out-of-bounds reads, confidentiality is scored High.\nI:N - There is no out-of-bounds write or attacker-controlled write primitive; value 2 is stored in-bounds and the GPIO layer normalizes it to the same Boolean state as valid value 1.\nA:H - The out-of-bounds text pointer commonly resolves to NULL or another invalid address and is dereferenced by strcmp(), causing a kernel oops and potentially a full panic on panic-on-oops systems."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "342fbb7578d1741ff646d7b08e14e8753267b9fa", "lessThan": "6fb653b62f169f6050fac45b56bf21ad097e19f6", "versionType": "git"}, {"status": "affected", "version": "342fbb7578d1741ff646d7b08e14e8753267b9fa", "lessThan": "d8cc3e747b002a8b965c529de79c0654675b9a1a", "versionType": "git"}, {"status": "affected", "version": "342fbb7578d1741ff646d7b08e14e8753267b9fa", "lessThan": "5fe860af8630cf7c78523cbd68e5a234743585aa", "versionType": "git"}, {"status": "affected", "version": "342fbb7578d1741ff646d7b08e14e8753267b9fa", "lessThan": "2ff3ac6f7664fe5639cad01712ac5e021fa7939c", "versionType": "git"}, {"status": "affected", "version": "342fbb7578d1741ff646d7b08e14e8753267b9fa", "lessThan": "164dcbec9632ca93ae313e6da6e4e05584fa0f02", "versionType": "git"}, {"status": "affected", "version": "342fbb7578d1741ff646d7b08e14e8753267b9fa", "lessThan": "05ef77f02607a3dc5d7f9762cb990f76843315d4", "versionType": "git"}, {"status": "affected", "version": "342fbb7578d1741ff646d7b08e14e8753267b9fa", "lessThan": "f63ad68e18d774a5d15cd7e405ead63f6b322679", "versionType": "git"}], "programFiles": ["sound/soc/codecs/simple-mux.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.11"}, {"status": "unaffected", "version": "0", "lessThan": "5.11", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.210", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.176", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.143", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.93", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.35", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.12", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["sound/soc/codecs/simple-mux.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/6fb653b62f169f6050fac45b56bf21ad097e19f6"}, {"url": "https://git.kernel.org/stable/c/d8cc3e747b002a8b965c529de79c0654675b9a1a"}, {"url": "https://git.kernel.org/stable/c/5fe860af8630cf7c78523cbd68e5a234743585aa"}, {"url": "https://git.kernel.org/stable/c/2ff3ac6f7664fe5639cad01712ac5e021fa7939c"}, {"url": "https://git.kernel.org/stable/c/164dcbec9632ca93ae313e6da6e4e05584fa0f02"}, {"url": "https://git.kernel.org/stable/c/05ef77f02607a3dc5d7f9762cb990f76843315d4"}, {"url": "https://git.kernel.org/stable/c/f63ad68e18d774a5d15cd7e405ead63f6b322679"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: codecs: simple-mux: Fix enum control bounds check\n\nsimple_mux_control_put() rejects values greater than e->items, but\nenum control values are zero based. For the two-entry mux used by this\ndriver, valid values are 0 and 1, so value 2 must be rejected as well.\n\nAccepting e->items can store an invalid mux state, pass it to the GPIO\nsetter, and pass it on to the DAPM mux update path where it is used as\nan index into the enum text array.\n\nUse the same >= e->items check used by the ASoC enum helpers."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.210", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.176", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.143", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.93", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.35", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0.12", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1", "versionStartIncluding": "5.11"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:40:14.935Z"}}}, "cveMetadata": {"cveId": "CVE-2026-64243", "state": "PUBLISHED", "dateUpdated": "2026-10-16T15:42:27.151Z", "dateReserved": "2026-07-19T15:36:31.772Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-07-24T15:27:45.311Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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For the two-entry mux used by this\ndriver, valid values are 0 and 1, so value 2 must be rejected as well.\n\nAccepting e->items can store an invalid mux state, pass it to the GPIO\nsetter, and pass it on to the DAPM mux update path where it is used as\nan index into the enum text array.\n\nUse the same >= e->items check used by the ASoC enum helpers."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nASoC: c\u00f3decs: simple-mux: Corregir la comprobaci\u00f3n de l\u00edmites del control enum\n\nsimple_mux_control_put() rechaza valores mayores que e -> items, pero los valores de control enum est\u00e1n basados en cero. Para el multiplexor de dos entradas utilizado por este controlador, los valores v\u00e1lidos son 0 y 1, por lo que el valor 2 tambi\u00e9n debe ser rechazado.\n\nLa aceptaci\u00f3n de e -> items puede almacenar un estado de multiplexor no v\u00e1lido, pasarlo al configurador GPIO y pasarlo a la ruta de actualizaci\u00f3n del multiplexor DAPM donde se utiliza como un \u00edndice en el array de texto enum.\n\nUtilizar la misma comprobaci\u00f3n >= e -> items utilizada por los ayudantes enum de ASoC."}], "id": "CVE-2026-64243", "lastModified": "2026-11-08T16:10:00.183", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64243", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:37:50.570835Z", "version": "2.0.3"}}]}, "published": "2026-07-24T16:16:53.680", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/05ef77f02607a3dc5d7f9762cb990f76843315d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/164dcbec9632ca93ae313e6da6e4e05584fa0f02"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2ff3ac6f7664fe5639cad01712ac5e021fa7939c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5fe860af8630cf7c78523cbd68e5a234743585aa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6fb653b62f169f6050fac45b56bf21ad097e19f6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d8cc3e747b002a8b965c529de79c0654675b9a1a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f63ad68e18d774a5d15cd7e405ead63f6b322679"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-129"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-125"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: ASoC: codecs: simple-mux: Fix enum control bounds check", "id": "2506803", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2506803"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2026-64243", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64243\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64243\nhttps://lore.kernel.org/linux-cve-announce/2026072442-CVE-2026-64243-3088@gregkh/T"], "threat_severity": "Moderate"}

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