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CVE-2026-31775

Estado: AnalizadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

ALSA: ctxfi: Don't enumerate SPDIF1 at DAIO initialization

The recent refactoring of xfi driver changed the assignment of atc->daios[] at atc_get_resources(); now it loops over all enum DAIOTYP entries while it looped formerly only a part of them. The problem is that the last entry, SPDIF1, is a special type that is used only for hw20k1 CTSB073X model (as a replacement of SPDIFIO), and there is no corresponding definition for hw20k2. Due to the lack of the info, it caused a kernel crash on hw20k2, which was already worked around by the commit b045ab3dff97 ("ALSA: ctxfi: Fix missing SPDIFI1 index handling").

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This patch addresses the root cause of the regression above properly, simply by skipping the incorrect SPDIF1 type in the parser loop.

For making the change clearer, the code is slightly arranged, too.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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        "source": "nvd@nist.gov",
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          "version": "3.1",
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          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
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  "published": "2026-05-01T15:16:40.863",
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: ctxfi: Don't enumerate SPDIF1 at DAIO initialization\n\nThe recent refactoring of xfi driver changed the assignment of\natc->daios[] at atc_get_resources(); now it loops over all enum\nDAIOTYP entries while it looped formerly only a part of them.\nThe problem is that the last entry, SPDIF1, is a special type that\nis used only for hw20k1 CTSB073X model (as a replacement of SPDIFIO),\nand there is no corresponding definition for hw20k2.  Due to the lack\nof the info, it caused a kernel crash on hw20k2, which was already\nworked around by the commit b045ab3dff97 (\"ALSA: ctxfi: Fix missing\nSPDIFI1 index handling\").\n\nThis patch addresses the root cause of the regression above properly,\nsimply by skipping the incorrect SPDIF1 type in the parser loop.\n\nFor making the change clearer, the code is slightly arranged, too."
    }
  ],
  "lastModified": "2026-06-17T10:34:26.450",
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