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Vulnerability record · CVE-2026-23076 · published 4 February 2026

CVE-2026-23076: Linux kernel out-of-bounds read vulnerability

Linux · Linux Kernel

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.

7.1 CVSS 3.1 High EPSS 0.13% · top 97.6% CWE-125 · Out-of-bounds read
7.1CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/61006c540cbdedea83b05577dc7fb7fa18fe1276 Patch
https://git.kernel.org/stable/c/6524205326e0c1a21263b5c14e48e14ef7e449ae Patch
https://git.kernel.org/stable/c/873e2360d247eeee642878fcc3398babff7e387c Patch
https://git.kernel.org/stable/c/8c1d09806e1441bc6a54b9a4f2818918046d5174 Patch
https://git.kernel.org/stable/c/a8c42d11b0526a89192bd2f79facb4c60c8a1f38 Patch
https://git.kernel.org/stable/c/afca7ff5d5d4d63a1acb95461f55ca9a729feedf Patch
https://git.kernel.org/stable/c/d77ba72558cd66704f0fb7e0969f697e87c0f71c Patch

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Source: NIST National Vulnerability Database (record CVE-2026-23076), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.