{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23076", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.958Z", "datePublished": "2026-02-04T16:08:01.204Z", "dateUpdated": "2026-02-09T08:38:15.852Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-02-09T08:38:15.852Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: ctxfi: Fix potential OOB access in audio mixer handling\n\nIn the audio mixer handling code of ctxfi driver, the conf field is\nused as a kind of loop index, and it's referred in the index callbacks\n(amixer_index() and sum_index()).\n\nAs spotted recently by fuzzers, the current code causes OOB access at\nthose functions.\n| UBSAN: array-index-out-of-bounds in 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"CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*", "matchCriteriaId": "3EF854A1-ABB1-4E93-BE9A-44569EC76C0D", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: ctxfi: Fix potential OOB access in audio mixer handling\n\nIn the audio mixer handling code of ctxfi driver, the conf field is\nused as a kind of loop index, and it's referred in the index callbacks\n(amixer_index() and sum_index()).\n\nAs spotted recently by fuzzers, the current code causes OOB access at\nthose functions.\n| UBSAN: array-index-out-of-bounds in /build/reproducible-path/linux-6.17.8/sound/pci/ctxfi/ctamixer.c:347:48\n| index 8 is out of range for type 'unsigned char [8]'\n\nAfter the analysis, the cause was found to be the lack of the proper\n(re-)initialization of conj field.\n\nThis patch addresses those OOB accesses by adding the proper\ninitializations of the loop indices."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nALSA: ctxfi: Correcci\u00f3n de posible acceso OOB en el manejo del mezclador de audio\n\nEn el c\u00f3digo de manejo del mezclador de audio del controlador ctxfi, el campo 'conf' se utiliza como una especie de \u00edndice de bucle, y se hace referencia a \u00e9l en las retrollamadas de \u00edndice (amixer_index() y sum_index()).\n\nComo fue detectado recientemente por fuzzers, el c\u00f3digo actual causa acceso OOB en esas funciones.\n| UBSAN: \u00edndice de array fuera de l\u00edmites en /build/reproducible-path/linux-6.17.8/sound/pci/ctxfi/ctamixer.c:347:48\n| el \u00edndice 8 est\u00e1 fuera de rango para el tipo 'unsigned char [8]'\n\nDespu\u00e9s del an\u00e1lisis, se encontr\u00f3 que la causa era la falta de la inicializaci\u00f3n (o reinicializaci\u00f3n) adecuada del campo 'conj'.\n\nEste parche aborda esos accesos OOB a\u00f1adiendo las inicializaciones adecuadas de los \u00edndices de bucle."}], "id": "CVE-2026-23076", "lastModified": "2026-03-18T14:03:25.730", "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": "[email protected]", "type": "Primary"}]}, "published": "2026-02-04T17:16:18.340", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/61006c540cbdedea83b05577dc7fb7fa18fe1276"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": 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{"bugzilla": {"description": "kernel: ALSA: ctxfi: Fix potential OOB access in audio mixer handling", "id": "2436826", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2436826"}, "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"}, "details": ["No description is available for this CVE."], "name": "CVE-2026-23076", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-02-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23076\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23076\nhttps://lore.kernel.org/linux-cve-announce/2026020420-CVE-2026-23076-b054@gregkh/T"], "threat_severity": "Moderate"}

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