Vulnerability · Published Oct 15, 2026 · Assigned by VulnCheck
CVE-2026-111131libxmp through 4.7.4 Stack Out-of-Bounds Read via P61A Depacker
Medium 6.1
In plain English
A medium-severity out-of-bounds read in libxmp from libxmp. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.2%top 90.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libxmp | no fix listed | DEBIAN-CVE-2026-111131 |
| Debian:13 | libxmp | no fix listed | DEBIAN-CVE-2026-111131 |
| Debian:14 | libxmp | no fix listed | DEBIAN-CVE-2026-111131 |
| Ubuntu:22.04:LTS | libxmp | no fix listed | UBUNTU-CVE-2026-111131 |
| Ubuntu:24.04:LTS | libxmp | no fix listed | UBUNTU-CVE-2026-111131 |
| Ubuntu:26.04:LTS | libxmp | no fix listed | UBUNTU-CVE-2026-111131 |
| Ubuntu:26.10 | libxmp | no fix listed | UBUNTU-CVE-2026-111131 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
References
- https://hackmd.io/@haind-pwn/libxmp-p61a-sample-backreference-oob-read technical-description
- https://github.com/libxmp/libxmp/blob/5d4f6aa2c7dcdf8e9cd8129fe579d45b36a302da/src/loaders/prowizard/p61a.c#L110-L116 technical-description
- https://github.com/libxmp/libxmp/blob/5d4f6aa2c7dcdf8e9cd8129fe579d45b36a302da/src/loaders/prowizard/p61a.c#L638-L641 technical-description
- https://github.com/libxmp/libxmp product
- VulnCheck Advisory: libxmp through 4.7.4 Stack Out-of-Bounds Read via P61A Depacker third-party-advisory