{"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": "2026-05-11T21:59:32.239Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:59:32.239Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["sound/pci/ctxfi/ctamixer.c"], "versions": [{"version": "8cc72361481f00253f1e468ade5795427386d593", "lessThan": "6524205326e0c1a21263b5c14e48e14ef7e449ae", "status": "affected", "versionType": "git"}, {"version": "8cc72361481f00253f1e468ade5795427386d593", "lessThan": "afca7ff5d5d4d63a1acb95461f55ca9a729feedf", "status": "affected", "versionType": "git"}, {"version": "8cc72361481f00253f1e468ade5795427386d593", "lessThan": "8c1d09806e1441bc6a54b9a4f2818918046d5174", "status": 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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": "nvd@nist.gov", "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"}

{"analysis": {"en": {"generated_at": "2026-04-18T13:53:28.102838+00:00", "value": {"mitigation_remediation": ["Upgrade the Linux kernel to the latest stable release that includes the proposed patch or backport the patch to the current kernel version.", "Reload the ctxfi module or reboot the system to load the corrected module.", "If upgrading is not immediately possible, restrict access to devices that load the ctxfi driver by implementing appropriate SELinux/AppArmor policies or limiting user capabilities for interacting with the ALSA subsystem."], "summary": {"action": "Apply Patch", "impact": "Potential out\u2011of\u2011bounds memory access in ALSA ctxfi mixer handling"}, "threat_synthesis": {"affected_systems": "Linux kernel versions up to 6.19 (including all release candidates) are affected. The kernel is maintained by the Linux Foundation and the source is available on the primary Git kernel repository. No vendor\u2011specific product list is required beyond the Linux kernel itself.", "description_and_impact": "The vulnerability resides in the ALSA ctxfi driver\u2019s audio mixer code where a configuration field is used as a loop counter without proper bounds checking. The code may read past the end of a static 8\u2011byte array, exposing the system to a memory corruption fault. This can trigger a crash or, in some configurations, may allow an attacker to read or influence memory, potentially leading to information disclosure or arbitrary code execution if exploited against a privileged context. The weakness is identified as CWE\u2011125, an out\u2011of\u2011bounds read error.", "risk_and_exploitability": "The CVSS score of 7.1 reflects a high impact and a medium level of exploit complexity. The EPSS probability is less than 1%, indicating that active exploitation is unlikely at present. The vulnerability is not listed in the CISA KEV catalog, and no known public exploits exist. Attackers would likely need to trigger the vulnerable code path, which requires access to the ALSA ctxfi driver, typically via privileged media or audio subsystem interactions."}}}}, "created": "2026-04-18T14:00:02.184346+00:00", "updated": "2026-04-18T14:00:02.184361+00:00", "vendors": []}