ALSA: ctxfi: Fix potential OOB access in audio mixer handling
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.
Affected products
2- Range: =6.17.8
- Linux/Linuxv5Range: 2.6.31
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
7- git.kernel.org/stable/c/61006c540cbdedea83b05577dc7fb7fa18fe1276mitre
- git.kernel.org/stable/c/6524205326e0c1a21263b5c14e48e14ef7e449aemitre
- git.kernel.org/stable/c/873e2360d247eeee642878fcc3398babff7e387cmitre
- git.kernel.org/stable/c/8c1d09806e1441bc6a54b9a4f2818918046d5174mitre
- git.kernel.org/stable/c/a8c42d11b0526a89192bd2f79facb4c60c8a1f38mitre
- git.kernel.org/stable/c/afca7ff5d5d4d63a1acb95461f55ca9a729feedfmitre
- git.kernel.org/stable/c/d77ba72558cd66704f0fb7e0969f697e87c0f71cmitre
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