FKIE_CVE-2026-23076

Vulnerability from fkie_nvd - Published: 2026-02-04 17:16 - Updated: 2026-02-06 17:16
Severity ?
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/61006c540cbdedea83b05577dc7fb7fa18fe1276
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6524205326e0c1a21263b5c14e48e14ef7e449ae
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/873e2360d247eeee642878fcc3398babff7e387c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8c1d09806e1441bc6a54b9a4f2818918046d5174
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a8c42d11b0526a89192bd2f79facb4c60c8a1f38
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/afca7ff5d5d4d63a1acb95461f55ca9a729feedf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d77ba72558cd66704f0fb7e0969f697e87c0f71c
Impacted products
Vendor Product Version
To clipboard 

{
  "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\u0027s 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 \u0027unsigned char [8]\u0027\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 \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."
    }
  ],
  "id": "CVE-2026-23076",
  "lastModified": "2026-02-06T17:16:23.520",
  "metrics": {},
  "published": "2026-02-04T17:16:18.340",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/61006c540cbdedea83b05577dc7fb7fa18fe1276"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6524205326e0c1a21263b5c14e48e14ef7e449ae"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/873e2360d247eeee642878fcc3398babff7e387c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8c1d09806e1441bc6a54b9a4f2818918046d5174"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a8c42d11b0526a89192bd2f79facb4c60c8a1f38"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/afca7ff5d5d4d63a1acb95461f55ca9a729feedf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d77ba72558cd66704f0fb7e0969f697e87c0f71c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.