CVE-2026-74294

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Exploitation requires issuing SNDRV_CTL_IOCTL_ELEM_WRITE against /dev/snd/controlC* on a Meson system with the AIU driver loaded; there is no network, adjacent-radio, or physical-device code path to the vulnerable mux put callbacks.\nAC:L - An attacker who can open the ALSA control device can reliably supply any out-of-range enumerated.item[0] value and trigger the bug on demand; no race, special memory layout, or other attacker-uncontrollable precondition is required.\nPR:L - On typical Linux-based Amlogic/Meson deployments (TV boxes, Kodi/SBC boards), unprivileged local users in the audio group can open the ALSA control device and write mixer controls without real root in the init namespace.\nUI:N - No victim interaction is required beyond the attacker opening /dev/snd/controlC* and writing the HDMI Source or ACodec Source enum control; no mount, playback, or other user action is needed.\nS:U - Impact is confined to the kernel audio subsystem on the local host; it does not cross VM, container, IOMMU, or other security boundaries into a different authority.\nC:H - Out-of-range mux values make snd_soc_dapm_mux_update_power() index past e->texts[] and pass the resulting pointer to strcmp(), causing an out-of-bounds kernel memory read that can disclose adjacent kernel data.\nI:L - The bug can force limited integrity changes via FIELD_PREP-masked AIU MMIO mux register writes and DAPM route reconnections, but it does not provide arbitrary kernel memory write or code-execution primitives.\nA:H - strcmp() on a pointer obtained from out-of-bounds e->texts[mux] can dereference invalid kernel addresses and trigger a kernel oops or panic, causing complete local audio/subsystem denial of service."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["sound/soc/meson/aiu-acodec-ctrl.c", "sound/soc/meson/aiu-codec-ctrl.c"], "versions": [{"version": "b82b734c0e9a75e1b956214ac523a8eb590f51f3", "lessThan": "91797708f99e4a910ab019760069c0a7e00a6fc0", "status": "affected", "versionType": "git"}, {"version": "b82b734c0e9a75e1b956214ac523a8eb590f51f3", "lessThan": "90703664dbc5a4bf3d84f649404318f3cafdbe69", "status": "affected", "versionType": "git"}, {"version": "b82b734c0e9a75e1b956214ac523a8eb590f51f3", "lessThan": "8a6d6735e7c02e88841cca1497ff3d8089f2ef24", "status": "affected", "versionType": "git"}, {"version": "b82b734c0e9a75e1b956214ac523a8eb590f51f3", "lessThan": "96f5b92d958bc34500500f29fab8e0b908f25397", "status": "affected", "versionType": "git"}, {"version": "b82b734c0e9a75e1b956214ac523a8eb590f51f3", "lessThan": "0965892cc486ca554d72eeb62d85ccf8d0137a5a", "status": "affected", "versionType": "git"}, {"version": "b82b734c0e9a75e1b956214ac523a8eb590f51f3", "lessThan": "d65adf85477247be04ac86886f8edfaa047b5d4a", "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/soc/meson/aiu-acodec-ctrl.c", "sound/soc/meson/aiu-codec-ctrl.c"], "versions": [{"version": "5.7", "status": "affected"}, {"version": "0", "lessThan": "5.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "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": "5.7", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/91797708f99e4a910ab019760069c0a7e00a6fc0"}, {"url": "https://git.kernel.org/stable/c/90703664dbc5a4bf3d84f649404318f3cafdbe69"}, {"url": "https://git.kernel.org/stable/c/8a6d6735e7c02e88841cca1497ff3d8089f2ef24"}, {"url": "https://git.kernel.org/stable/c/96f5b92d958bc34500500f29fab8e0b908f25397"}, {"url": "https://git.kernel.org/stable/c/0965892cc486ca554d72eeb62d85ccf8d0137a5a"}, {"url": "https://git.kernel.org/stable/c/d65adf85477247be04ac86886f8edfaa047b5d4a"}], "title": "ASoC: meson: aiu: Validate written enum values", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-74294", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T18:52:28.719550Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:55:30.979Z"}}]}}

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strcmp() on a pointer obtained from out-of-bounds e->texts[mux] can dereference invalid kernel addresses and trigger a kernel oops or panic, causing complete local audio/subsystem denial of service."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "b82b734c0e9a75e1b956214ac523a8eb590f51f3", "lessThan": "91797708f99e4a910ab019760069c0a7e00a6fc0", "versionType": "git"}, {"status": "affected", "version": "b82b734c0e9a75e1b956214ac523a8eb590f51f3", "lessThan": "90703664dbc5a4bf3d84f649404318f3cafdbe69", "versionType": "git"}, {"status": "affected", "version": "b82b734c0e9a75e1b956214ac523a8eb590f51f3", "lessThan": "8a6d6735e7c02e88841cca1497ff3d8089f2ef24", "versionType": "git"}, {"status": "affected", "version": "b82b734c0e9a75e1b956214ac523a8eb590f51f3", "lessThan": "96f5b92d958bc34500500f29fab8e0b908f25397", "versionType": "git"}, {"status": "affected", "version": "b82b734c0e9a75e1b956214ac523a8eb590f51f3", "lessThan": "0965892cc486ca554d72eeb62d85ccf8d0137a5a", "versionType": "git"}, {"status": "affected", "version": "b82b734c0e9a75e1b956214ac523a8eb590f51f3", "lessThan": "d65adf85477247be04ac86886f8edfaa047b5d4a", "versionType": "git"}], "programFiles": ["sound/soc/meson/aiu-acodec-ctrl.c", "sound/soc/meson/aiu-codec-ctrl.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.7"}, {"status": "unaffected", "version": "0", "lessThan": "5.7", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.189", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.158", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.111", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.53", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["sound/soc/meson/aiu-acodec-ctrl.c", "sound/soc/meson/aiu-codec-ctrl.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/91797708f99e4a910ab019760069c0a7e00a6fc0"}, {"url": "https://git.kernel.org/stable/c/90703664dbc5a4bf3d84f649404318f3cafdbe69"}, {"url": "https://git.kernel.org/stable/c/8a6d6735e7c02e88841cca1497ff3d8089f2ef24"}, {"url": "https://git.kernel.org/stable/c/96f5b92d958bc34500500f29fab8e0b908f25397"}, {"url": "https://git.kernel.org/stable/c/0965892cc486ca554d72eeb62d85ccf8d0137a5a"}, {"url": "https://git.kernel.org/stable/c/d65adf85477247be04ac86886f8edfaa047b5d4a"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: meson: aiu: Validate written enum values\n\nThe AIU HDMI and internal codec mux put callbacks use the written enum\nvalue with snd_soc_enum_item_to_val() before checking whether the value is\nvalid for the enumeration.\n\nReject out-of-range values before converting the enum item, matching the\nvalidation already done by the G12A HDMI and internal codec mux controls."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.189", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.158", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.111", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.53", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.5", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "5.7"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-03T10:56:00.067Z"}}}, "cveMetadata": {"cveId": "CVE-2026-74294", "state": "PUBLISHED", "dateUpdated": "2026-10-16T18:55:30.979Z", "dateReserved": "2026-08-15T05:44:03.882Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-15T05:57:59.508Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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{"bugzilla": {"description": "kernel: ASoC: meson: aiu: Validate written enum values", "id": "2516888", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516888"}, "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"}, "cwe": "CWE-1287", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nASoC: meson: aiu: Validate written enum values\nThe AIU HDMI and internal codec mux put callbacks use the written enum\nvalue with snd_soc_enum_item_to_val() before checking whether the value is\nvalid for the enumeration.\nReject out-of-range values before converting the enum item, matching the\nvalidation already done by the G12A HDMI and internal codec mux controls.", "A flaw was found in the Linux kernel's Advanced Linux Sound Architecture (ALSA) System on Chip (ASoC) meson audio interface unit (AIU) component. The AIU HDMI and internal codec mux put callbacks do not properly validate enum values before processing them. This allows an attacker to provide out-of-range enum values, which could lead to unexpected system behavior or a denial of service."], "name": "CVE-2026-74294", "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": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74294\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74294\nhttps://lore.kernel.org/linux-cve-announce/2026081548-CVE-2026-74294-6fc0@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b82b734c0e9a75e1b956214ac523a8eb590f51f3,0965892cc486ca554d72eeb62d85ccf8d0137a5a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b82b734c0e9a75e1b956214ac523a8eb590f51f3,d65adf85477247be04ac86886f8edfaa047b5d4a)"}}], "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": "5.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "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": "2026-08-15T17:45:03.068945+00:00", "updated": "2026-08-22T01:00:13.561615+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-119", "CWE-680", "CWE-1287"]}