CVE-2026-100310
GNU libextractor before 1.16 Privilege Escalation via LIBEXTRACTOR_PREFIX
- State
- Published
- Severity
- 7.3 High
- Published
- Sep 25, 2026
- Updated
- Sep 30, 2026
- Reserved
- Sep 25, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.3 High | CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.0 High | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-426 Untrusted Search Path
Affected Products
| Product | Versions |
|---|---|
libextractorGNU |
|
References
- https://github.com/Haitam-lazaar/libextractor-privescexploitthird-party-advisory
- https://git.gnunet.org/gnunet/libextractor/commit/6edfa653c048800e24a17f7e8cc2bb42659b8d01.htmlpatch
- 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_PREFIXthird-party-advisory
- http://www.openwall.com/lists/oss-security/2026/09/25/25
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