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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-23076
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-02-04 17:16:18 UTC
Updated2026-10-19 19:17:34 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

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

Problem Types: CWE-125 | CWE-125 CWE-125 Out-of-bounds Read

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 8cc72361481f00253f1e468ade5795427386d593 6524205326e0c1a21263b5c14e48e14ef7e449ae git Not specified
CNA Linux Linux affected 8cc72361481f00253f1e468ade5795427386d593 afca7ff5d5d4d63a1acb95461f55ca9a729feedf git Not specified
CNA Linux Linux affected 8cc72361481f00253f1e468ade5795427386d593 8c1d09806e1441bc6a54b9a4f2818918046d5174 git Not specified
CNA Linux Linux affected 8cc72361481f00253f1e468ade5795427386d593 a8c42d11b0526a89192bd2f79facb4c60c8a1f38 git Not specified
CNA Linux Linux affected 8cc72361481f00253f1e468ade5795427386d593 d77ba72558cd66704f0fb7e0969f697e87c0f71c git Not specified
CNA Linux Linux affected 8cc72361481f00253f1e468ade5795427386d593 873e2360d247eeee642878fcc3398babff7e387c git Not specified
CNA Linux Linux affected 8cc72361481f00253f1e468ade5795427386d593 61006c540cbdedea83b05577dc7fb7fa18fe1276 git Not specified
CNA Linux Linux affected 2.6.31 Not specified
CNA Linux Linux unaffected 2.6.31 semver Not specified
CNA Linux Linux unaffected 5.10.249 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.199 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.162 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.122 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.68 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.8 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/d77ba72558cd66704f0fb7e0969f697e87c0f71c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/873e2360d247eeee642878fcc3398babff7e387c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6524205326e0c1a21263b5c14e48e14ef7e449ae 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a8c42d11b0526a89192bd2f79facb4c60c8a1f38 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8c1d09806e1441bc6a54b9a4f2818918046d5174 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/61006c540cbdedea83b05577dc7fb7fa18fe1276 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/afca7ff5d5d4d63a1acb95461f55ca9a729feedf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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