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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.

PUBLISHED Reserved 2026-01-13 | Published 2026-02-04 | Updated 2026-02-09 | Assigner Linux

Product status

Default status
unaffected

8cc72361481f00253f1e468ade5795427386d593 (git) before 6524205326e0c1a21263b5c14e48e14ef7e449ae
affected

8cc72361481f00253f1e468ade5795427386d593 (git) before afca7ff5d5d4d63a1acb95461f55ca9a729feedf
affected

8cc72361481f00253f1e468ade5795427386d593 (git) before 8c1d09806e1441bc6a54b9a4f2818918046d5174
affected

8cc72361481f00253f1e468ade5795427386d593 (git) before a8c42d11b0526a89192bd2f79facb4c60c8a1f38
affected

8cc72361481f00253f1e468ade5795427386d593 (git) before d77ba72558cd66704f0fb7e0969f697e87c0f71c
affected

8cc72361481f00253f1e468ade5795427386d593 (git) before 873e2360d247eeee642878fcc3398babff7e387c
affected

8cc72361481f00253f1e468ade5795427386d593 (git) before 61006c540cbdedea83b05577dc7fb7fa18fe1276
affected

Default status
affected

2.6.31
affected

Any version before 2.6.31
unaffected

5.10.249 (semver)
unaffected

5.15.199 (semver)
unaffected

6.1.162 (semver)
unaffected

6.6.122 (semver)
unaffected

6.12.68 (semver)
unaffected

6.18.8 (semver)
unaffected

6.19 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/6524205326e0c1a21263b5c14e48e14ef7e449ae

git.kernel.org/...c/afca7ff5d5d4d63a1acb95461f55ca9a729feedf

git.kernel.org/...c/8c1d09806e1441bc6a54b9a4f2818918046d5174

git.kernel.org/...c/a8c42d11b0526a89192bd2f79facb4c60c8a1f38

git.kernel.org/...c/d77ba72558cd66704f0fb7e0969f697e87c0f71c

git.kernel.org/...c/873e2360d247eeee642878fcc3398babff7e387c

git.kernel.org/...c/61006c540cbdedea83b05577dc7fb7fa18fe1276

cve.org (CVE-2026-23076)

nvd.nist.gov (CVE-2026-23076)

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