CVE-2026-23076 (GCVE-0-2026-23076)

Vulnerability from cvelistv5 – Published: 2026-02-04 16:08 – Updated: 2026-10-19 18:25
VLAI
Title
ALSA: ctxfi: Fix potential OOB access in audio mixer handling
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: ctxfi: Fix potential OOB access in audio mixer handling In the audio mixer handling code of ctxfi driver, the conf field is used as a kind of loop index, and it's referred in the index callbacks (amixer_index() and sum_index()). As spotted recently by fuzzers, the current code causes OOB access at those functions. | UBSAN: array-index-out-of-bounds in /build/reproducible-path/linux-6.17.8/sound/pci/ctxfi/ctamixer.c:347:48 | index 8 is out of range for type 'unsigned char [8]' After the analysis, the cause was found to be the lack of the proper (re-)initialization of conj field. This patch addresses those OOB accesses by adding the proper initializations of the loop indices.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 20:42 UTC
CWE
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8cc72361481f00253f1e468ade5795427386d593 , < 6524205326e0c1a21263b5c14e48e14ef7e449ae (git)
Affected: 8cc72361481f00253f1e468ade5795427386d593 , < afca7ff5d5d4d63a1acb95461f55ca9a729feedf (git)
Affected: 8cc72361481f00253f1e468ade5795427386d593 , < 8c1d09806e1441bc6a54b9a4f2818918046d5174 (git)
Affected: 8cc72361481f00253f1e468ade5795427386d593 , < a8c42d11b0526a89192bd2f79facb4c60c8a1f38 (git)
Affected: 8cc72361481f00253f1e468ade5795427386d593 , < d77ba72558cd66704f0fb7e0969f697e87c0f71c (git)
Affected: 8cc72361481f00253f1e468ade5795427386d593 , < 873e2360d247eeee642878fcc3398babff7e387c (git)
Affected: 8cc72361481f00253f1e468ade5795427386d593 , < 61006c540cbdedea83b05577dc7fb7fa18fe1276 (git)
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Linux Linux Affected: 2.6.31
Unaffected: 0 , < 2.6.31 (semver)
Unaffected: 5.10.249 , ≤ 5.10.* (semver)
Unaffected: 5.15.199 , ≤ 5.15.* (semver)
Unaffected: 6.1.162 , ≤ 6.1.* (semver)
Unaffected: 6.6.122 , ≤ 6.6.* (semver)
Unaffected: 6.12.68 , ≤ 6.12.* (semver)
Unaffected: 6.18.8 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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            "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 \u0027conf\u0027 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 \u0027unsigned char [8]\u0027\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 \u0027conj\u0027.\n\nEste parche aborda esos accesos OOB a\u00f1adiendo las inicializaciones adecuadas de los \u00edndices de bucle."
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        "id": "CVE-2026-23076",
        "lastModified": "2026-10-19T19:17:34.620",
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      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of Service in ALSA ctxfi driver due to out-of-bounds access",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23076.json",
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              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
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        ],
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              "product": "Linux",
              "programFiles": [
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        "dateReserved": "2026-01-13T15:37:45.958Z",
        "dateUpdated": "2026-10-19T18:25:29.498Z",
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  }
}



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