Out-of-bounds Read in Libxmp
CVE-2026-111131
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@haind-pwn/libxmp-p61a-sample-backreference-oob-read (technical-description)
- github.com/libxmp/libxmp/blob/5d4f6aa2c7dcdf8e9cd8129fe579d45b36a302da/src/load… (technical-description)
- github.com/libxmp/libxmp/blob/5d4f6aa2c7dcdf8e9cd8129fe579d45b36a302da/src/load… (technical-description)
- github.com/libxmp/libxmp (product)
- www.vulncheck.com/advisories/libxmp-through-4.7.4-stack-out-of-bounds-read-via-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111131?
- CVE-2026-111131 is a medium-severity vulnerability in Libxmp, classified under Out-of-bounds Read. CVSS score: 6.1/10. Published 2026-10-15.
- How severe is CVE-2026-111131?
- Medium severity. CVSS v3 base score is 6.1 out of 10.