CVE-2025-55639

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.

CVSS 3.1

6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 43% of CVEs (scores of 2026-10-25)

CWE

CWE-476

Published

2026-06-23

Modified

2026-10-12

Record from

the NVD, synced 2026-10-19

Affected

• gpac:gpac

References

• https://github.com/gpac/gpac/commit/027ce139dda498ee95df36db9f9f6f3cadce8ec9
• https://github.com/gpac/gpac/issues/3260
• https://github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/23/23_poc.mp4
• https://infosec.exchange/@sigdevel/116769184815236865
• http://www.openwall.com/lists/oss-security/2026/06/26/2

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