Vulnerability · Published Sep 25, 2026 · Assigned by VulnCheck
CVE-2026-100310GNU libextractor before 1.16 Privilege Escalation via LIBEXTRACTOR_PREFIX
High 7.0
In plain English
A high-severity security flaw in libextractor from GNU. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
GNU libextractor before 1.16 loads plugins from an untrusted search path specified by the LIBEXTRACTOR_PREFIX environment variable without proper privilege checks. A local attacker can exploit this by setting LIBEXTRACTOR_PREFIX to a directory containing a malicious plugin that executes arbitrary code with elevated privileges when loaded by a setuid or setgid program.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libextractor | no fix listed | DEBIAN-CVE-2026-100310 |
| Debian:13 | libextractor | no fix listed | DEBIAN-CVE-2026-100310 |
| Debian:14 | libextractor | 1:1.17-1 | DEBIAN-CVE-2026-100310 |
| Ubuntu:22.04:LTS | libextractor | no fix listed | UBUNTU-CVE-2026-100310 |
| Ubuntu:24.04:LTS | libextractor | no fix listed | UBUNTU-CVE-2026-100310 |
| Ubuntu:26.04:LTS | libextractor | no fix listed | UBUNTU-CVE-2026-100310 |
| Ubuntu:26.10 | libextractor | no fix listed | UBUNTU-CVE-2026-100310 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| GNU | libextractor | 0 – before 1.16 |
Weakness: CWE-426 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/Haitam-lazaar/libextractor-privesc exploit, third-party-advisory
- https://git.gnunet.org/gnunet/libextractor/commit/6edfa653c048800e24a17f7e8cc2bb42659b8d01.html patch
- https://ftp.gnu.org/gnu/libextractor/ release-notes
- https://www.gnu.org/software/libextractor/ product
- VulnCheck Advisory: GNU libextractor before 1.16 Privilege Escalation via LIBEXTRACTOR_PREFIX third-party-advisory
- http://www.openwall.com/lists/oss-security/2026/09/25/25