GPAC MP4Box avc_ext.c gf_isom_nalu_sample_rewrite double free (CVE-2025-15667) | HOL Guard CVE

Low · CVSS 3.3CVE-2025-15667

GPAC MP4Box avc_ext.c gf_isom_nalu_sample_rewrite double free

Answer in brief

CVE-2025-15667 records a Low severity (CVSS 3.3) vulnerability in GPAC MP4Box avc_ext.c gf_isom_nalu_sample_rewrite double free. The current sources do not mark it as known exploited. The current feed maps n/a/GPAC (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 Jul 6, 2026Updated Jul 6, 2026Source checked Sep 19, 2026First seen by HOL Jul 6, 2026Material review Jul 6, 2026

Upstream Advisory

Key facts

Risk: Low · CVSS 3.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 3.3. 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 n/a/GPAC (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
n/a/GPACgeneric	2.5-DEV	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for n/a/GPAC.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Jul 6, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Jul 6, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 6, 2026

Sources and claim methodology

Upstream source description

A vulnerability was determined in GPAC up to 2.5-DEV. This vulnerability affects the function gf_isom_nalu_sample_rewrite of the file src/isomedia/avc_ext.c of the component MP4Box. This manipulation of the argument nalu_out_bs causes double free. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. Patch name: f29f955f2a3b5e8e507caad3e52319f961bf37bf. To fix this issue, it is recommended to deploy a patch.

Quoted source text, attributed separately from HOL analysis.