CVE-2026-23076

HIGH

Linux Kernel - Out-of-bounds Read in ALSA ctxfi Audio Mixer Handling

Title source: llm
STIX 2.1

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.

Scores

CVSS v3 7.1
EPSS 0.0013
EPSS Percentile 2.6%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-125
Status published
Products (24)
linux/Kernel 2.6.31 - 5.10.249linux
linux/Kernel 5.11.0 - 5.15.199linux
linux/Kernel 5.16.0 - 6.1.162linux
linux/Kernel 6.13.0 - 6.18.8linux
linux/Kernel 6.2.0 - 6.6.122linux
linux/Kernel 6.7.0 - 6.12.68linux
Linux/Linux < 2.6.31
Linux/Linux 2.6.31
Linux/Linux 5.10.249 - 5.10.*
Linux/Linux 5.15.199 - 5.15.*
... and 14 more
Published Feb 04, 2026
Tracked Since Feb 18, 2026