CVE-2026-122329: libsdl-org SDL_mixer

SDL_mixer 3.1.2 through 3.2.4 Stack-based Buffer Overflow via FetchXLaw() in AIFF Decoder

CVSS 8.5 High

Published by the CVE Program (CNA: VulnCheck) at 5 Nov 2026, 15:11 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
libsdl-org	SDL_mixer pkg:github/libsdl-org/SDL_mixer	affected 3.1.2 to 3.2.4, inclusive semver Other versions: unaffected

Identifiers

CVE-2026-122329

CNA

VulnCheck

Weakness (CWE)

CWE-121

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.5	High	4.0	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	CNA (VulnCheck)Used for this record
7.8	High	3.1	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	CNA (VulnCheck)

CISA KEV Not listed.
EPSS No score.

Timeline

5 Nov 2026, 15:11 UTC Confirmed by the CVE List
5 Nov 2026, 15:24 UTC First seen by agentprime
5 Nov 2026, 16:17 UTC Confirmed by NVD

Sources

References from the CNA

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

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.