CVE-2026-122329: Stack Overflow (CVSS 7.8)

Description

SDL_mixer 3.1.2 through 3.2.4 contains a stack-based buffer overflow in FetchXLaw() in src/decoder_aiff.c due to miscalculated output offsets when expanding A-law or mu-law samples. Attackers can supply a crafted AIFF-C file that overwrites roughly 1 KB of adjacent stack memory when decoded, causing crashes or potential code execution.

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CVSS v3.1 Score

7.8

HIGH

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

EPSS — Exploit Prediction

0.0016

Probability of exploitation

0.05%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-121 CWE-121

References

Other References

https://github.com/libsdl-org/SDL_mixer https://github.com/libsdl-org/SDL_mixer/blob/release-3.2.4/src/decoder_aiff.c#L535-536 https://github.com/libsdl-org/SDL_mixer/blob/release-3.2.4/src/decoder_aiff.c#L86-97 https://github.com/libsdl-org/SDL_mixer/commit/34486847a607540ce9ef5fbe20979c7140bf8c82 https://github.com/libsdl-org/SDL_mixer/issues/907 https://hackmd.io/@haindpwn/sdl-mixer-fetchxlaw-stack-overflow https://www.vulncheck.com/advisories/sdl-mixer-3.1.2-through-3.2.4-stack-based-buffer-overflow-via-fetchxlaw-in-aiff-decoder

Frequently Asked Questions

What is CVE-2026-122329? +

SDL_mixer 3.1.2 through 3.2.4 contains a stack-based buffer overflow in FetchXLaw() in src/decoder_aiff.c due to miscalculated output offsets when expanding A-law or mu-law samples. Attackers can supply a crafted AIFF-C file that overwrites roughly 1 KB of adjacent stack memory when decoded, causing crashes or potential code execution. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-122329? +

CVE-2026-122329 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0016, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-122329? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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