High · published February 4, 2026
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.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 2.6.31, < 5.10.249 | 5.10.249 |
| linux/linux_kernel | ≥ 5.11, < 5.15.199 | 5.15.199 |
| linux/linux_kernel | ≥ 5.16, < 6.1.162 | 6.1.162 |
| linux/linux_kernel | ≥ 6.2, < 6.6.122 | 6.6.122 |
| linux/linux_kernel | ≥ 6.7, < 6.12.68 | 6.12.68 |
| linux/linux_kernel | ≥ 6.13, < 6.18.8 | 6.18.8 |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |