Riskcovery

CVE-2026-23076

ALSA: ctxfi: Fix potential OOB access in audio mixer handling

State
Published
Severity
Not scored
Published
Feb 4, 2026
Updated
Oct 19, 2026
Reserved
Jan 13, 2026

Read the record on cve.org

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

The record has no CVSS score.

Weaknesses

Affected Products

ProductVersions
LinuxLinux
  • 8cc72361481f00253f1e468ade5795427386d593 to before 6524205326e0c1a21263b5c14e48e14ef7e449aeAffected
  • 8cc72361481f00253f1e468ade5795427386d593 to before afca7ff5d5d4d63a1acb95461f55ca9a729feedfAffected
  • 8cc72361481f00253f1e468ade5795427386d593 to before 8c1d09806e1441bc6a54b9a4f2818918046d5174Affected
  • 8cc72361481f00253f1e468ade5795427386d593 to before a8c42d11b0526a89192bd2f79facb4c60c8a1f38Affected
  • 8cc72361481f00253f1e468ade5795427386d593 to before d77ba72558cd66704f0fb7e0969f697e87c0f71cAffected
  • 8cc72361481f00253f1e468ade5795427386d593 to before 873e2360d247eeee642878fcc3398babff7e387cAffected
  • 8cc72361481f00253f1e468ade5795427386d593 to before 61006c540cbdedea83b05577dc7fb7fa18fe1276Affected
LinuxLinux
  • 2.6.31Affected
  • before 2.6.31Not affected
  • 5.10.249 through 5.10.*Not affected
  • 5.15.199 through 5.15.*Not affected
  • 6.1.162 through 6.1.*Not affected
  • 6.6.122 through 6.6.*Not affected
  • 6.12.68 through 6.12.*Not affected
  • 6.18.8 through 6.18.*Not affected
  • 6.19 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.