CVE-2025-55639CWE-476

CVE-2025-55639

Medium · published June 23, 2026

CVSS v3.1

6.5

EPSS

Percentile

42.7

In the wild

Unconfirmed

What it is

GPAC MP4Box v2.4 was discovered to contain a NULL pointer dereference in the gf_isom_add_track_kind() function at isomedia/isom_write.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted MP4 file.

The record

Technical detail

CVSS v3.1: 6.5 · MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0: Not supplied
EPSS: 0.00511 · 42.7th percentile
Weakness: CWE-476 · NULL Pointer Dereference
Published: 2026-06-23T20:16Z

Affected products (1)

Product	Versions	Fixed in
gpac/gpac	< 26.02.0	26.02.0

References (6)

https://github.com/gpac/gpac/commit/027ce139dda498ee95df36db9f9f6f3cadce8ec9 · [email protected]https://github.com/gpac/gpac/issues/3260 · [email protected]https://github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/23/23_poc.mp4 · [email protected]https://infosec.exchange/@sigdevel/116769184815236865 · [email protected]http://www.openwall.com/lists/oss-security/2026/06/26/2 · af854a3a-2127-422b-91ae-364da2661108 https://github.com/gpac/gpac/issues/3260 · 134c704f-9b21-4f2e-91b3-4a467353bcc0

EPSS history

Timeline

23 JUN 00:00Z
GPAC MP4Box v2.4 was discovered to contain a NULL pointer dereference in the gf_isom_add_track_kind() function at isomedia/isom_write.c
cvelistv5