GNU libextractor before 1.16 Privilege Escalation via LIBEXTRACTOR_PREFIX (CVE-2026-100310) | HOL Guard CVE

High · CVSS 7.3CVE-2026-100310

GNU libextractor before 1.16 Privilege Escalation via LIBEXTRACTOR_PREFIX

Answer in brief

CVE-2026-100310 records a High severity (CVSS 7.3) vulnerability in GNU libextractor before 1.16 Privilege Escalation via LIBEXTRACTOR_PREFIX. The current sources do not mark it as known exploited. The current feed maps GNU/libextractor (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 7.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps GNU/libextractor (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
GNU/libextractorgeneric	>=0 <1.16	1.16

Recommended response

Check inventory. Check lockfiles and deployed manifests for GNU/libextractor.
Review the reported fix. Update GNU/libextractor to 1.16 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.