{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-74295", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.882Z", "datePublished": "2026-08-15T05:58:00.123Z", "dateUpdated": "2026-10-16T18:55:31.120Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:45:33.387Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: codecs: hdac_hdmi: Validate written enum value\n\nhdac_hdmi_set_pin_port_mux() uses the written enum value to index the\ntexts array before calling snd_soc_dapm_put_enum_double(), which validates\nthat the value is within the enum item range.\n\nAn out-of-range value can therefore make the driver read past the texts\narray before the helper rejects the write. Move the lookup after the helper\nhas accepted the value." } ], "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 - The flaw is reached only through local ALSA control ioctls on /dev/snd/controlC* (SNDRV_CTL_IOCTL_ELEM_WRITE), which invoke hdac_hdmi_set_pin_port_mux(); there is no network, Bluetooth, or physical-input path to this callback.\nAC:L - An attacker with access to the ALSA control device can supply any out-of-range enumerated.item[0] value and reliably trigger the out-of-bounds texts[] read on default kernels without CONFIG_SND_CTL_INPUT_VALIDATION, without races or other uncontrollable conditions.\nPR:L - Exploitation requires local access to the ALSA control device (/dev/snd/controlC*), typically granted to the logged-in desktop user or audio group; no CAP_SYS_ADMIN or real root is required and user namespaces do not gate this path.\nUI:N - Once the attacker has ALSA control-device access, they can issue the ioctl directly to the Pin port Input mux control without requiring any action from another user or victim.\nS:U - The vulnerable Intel HDMI/DP audio codec driver and resulting kernel memory impacts remain within the host kernel security authority and do not cross VM, container, or IOMMU security boundaries.\nC:H - The unchecked enum index performs an out-of-bounds read of e->texts[], loading attacker-chosen adjacent kernel heap memory as a char* before validation rejects the write; per conservative kernel guidance, out-of-bounds reads are scored High.\nI:N - The bug is a read-only out-of-bounds array access with no out-of-bounds write, heap corruption, or attacker-controlled modification; snd_soc_dapm_put_enum_double() rejects invalid values before persisting any mux state change.\nA:H - Attacker-controlled out-of-bounds indices can load texts[] from unmapped addresses and fault the kernel during the pointer fetch; even near-boundary reads are a memory-safety violation treated conservatively as potential denial-of-service on affected Intel HDMI 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/hdac_hdmi.c" ], "versions": [ { "version": "4a3478debf36c0aa0cf0860daec245b13cd4448f", "lessThan": "216336418c007c4b44c650acf2fd3d2de5bb81e8", "status": "affected", "versionType": "git" }, { "version": "4a3478debf36c0aa0cf0860daec245b13cd4448f", "lessThan": "bc464a6a9e352daa17b1636c090cf3185710b9a0", "status": "affected", "versionType": "git" }, { "version": "4a3478debf36c0aa0cf0860daec245b13cd4448f", "lessThan": "8cbf24714d6b3f553fc959632c9781176a73a9a7", "status": "affected", "versionType": "git" }, { "version": "4a3478debf36c0aa0cf0860daec245b13cd4448f", "lessThan": "7f02e9064b6f84e7f93c72f134306271eb4f7de4", "status": "affected", "versionType": "git" }, { "version": "4a3478debf36c0aa0cf0860daec245b13cd4448f", "lessThan": "9131e4b023e0db5764680034bdc94aeae0b0f33d", "status": "affected", "versionType": "git" }, { "version": "4a3478debf36c0aa0cf0860daec245b13cd4448f", "lessThan": "d8961b5c7889b6ecc00f1409d36826df1665df27", "status": "affected", "versionType": "git" }, { "version": "4a3478debf36c0aa0cf0860daec245b13cd4448f", "lessThan": "0b08baeccdcf52fad328ad645f5b4fbee04eea34", "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/codecs/hdac_hdmi.c" ], "versions": [ { "version": "4.6", "status": "affected" }, { "version": "0", "lessThan": "4.6", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "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": "4.6", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/216336418c007c4b44c650acf2fd3d2de5bb81e8" }, { "url": "https://git.kernel.org/stable/c/bc464a6a9e352daa17b1636c090cf3185710b9a0" }, { "url": "https://git.kernel.org/stable/c/8cbf24714d6b3f553fc959632c9781176a73a9a7" }, { "url": "https://git.kernel.org/stable/c/7f02e9064b6f84e7f93c72f134306271eb4f7de4" }, { "url": "https://git.kernel.org/stable/c/9131e4b023e0db5764680034bdc94aeae0b0f33d" }, { "url": "https://git.kernel.org/stable/c/d8961b5c7889b6ecc00f1409d36826df1665df27" }, { "url": "https://git.kernel.org/stable/c/0b08baeccdcf52fad328ad645f5b4fbee04eea34" } ], "title": "ASoC: codecs: hdac_hdmi: Validate written enum value", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-74295", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-10-16T18:52:31.546747Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:55:31.120Z" } } ] } }