Vulnerability · Published Nov 5, 2026 · Assigned by VulnCheck
CVE-2026-122329SDL_mixer 3.1.2 through 3.2.4 Stack-based Buffer Overflow via FetchXLaw() in AIFF Decoder
High 7.8
In plain English
A high-severity stack buffer overflow in SDL_mixer from libsdl-org. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities).
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 94.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | libsdl2-mixer | no fix listed | UBUNTU-CVE-2026-122329 |
| Ubuntu:24.04:LTS | libsdl2-mixer | no fix listed | UBUNTU-CVE-2026-122329 |
| Ubuntu:26.04:LTS | libsdl2-mixer | no fix listed | UBUNTU-CVE-2026-122329 |
| Ubuntu:26.10 | libsdl2-mixer | no fix listed | UBUNTU-CVE-2026-122329 |
| Ubuntu:26.10 | libsdl3-mixer | no fix listed | UBUNTU-CVE-2026-122329 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| libsdl-org | SDL_mixer | 3.1.2 – through 3.2.4 |
Weakness: CWE-121 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- https://github.com/libsdl-org/SDL_mixer/issues/907 issue-tracking
- https://github.com/libsdl-org/SDL_mixer/commit/34486847a607540ce9ef5fbe20979c7140bf8c82 patch
- https://github.com/libsdl-org/SDL_mixer/blob/release-3.2.4/src/decoder_aiff.c#L86-97 technical-description
- https://github.com/libsdl-org/SDL_mixer/blob/release-3.2.4/src/decoder_aiff.c#L535-536 technical-description
- https://hackmd.io/@haindpwn/sdl-mixer-fetchxlaw-stack-overflow third-party-advisory
- https://github.com/libsdl-org/SDL_mixer product
- VulnCheck Advisory: SDL_mixer 3.1.2 through 3.2.4 Stack-based Buffer Overflow via FetchXLaw() in AIFF Decoder third-party-advisory