CVE-2026-111131

Description

libxmp through 4.7.4 contains an off-by-one stack out-of-bounds read vulnerability in the prowizard P61A depacker depack_p61a() in src/loaders/prowizard/p61a.c. Attackers can supply a crafted headerless P61A module with 31 samples and a 0xffe0 back-reference size word to leak stack memory into sample metadata or disrupt loading.

References

• https://github.com/libxmp/libxmp
• https://github.com/libxmp/libxmp/blob/5d4f6aa2c7dcdf8e9cd8129fe579d45b36a302da/src/loaders/prowizard/p61a.c#L110-L116
• https://github.com/libxmp/libxmp/blob/5d4f6aa2c7dcdf8e9cd8129fe579d45b36a302da/src/loaders/prowizard/p61a.c#L638-L641
• https://hackmd.io/@haind-pwn/libxmp-p61a-sample-backreference-oob-read
• https://www.vulncheck.com/advisories/libxmp-through-4.7.4-stack-out-of-bounds-read-via-p61a-depacker