CVE-2026-64834 | FFmpeg versions 0.6.3 through 8.1.2 contain an infinite loop… | CVSS 7.5 HIGH

Description

FFmpeg versions 0.6.3 through 8.1.2 contain an infinite loop vulnerability in the RTP/ASF demuxer within libavformat/rtpdec_asf.c that allows remote attackers to cause denial of service by sending a crafted RTP/ASF stream. The rtp_asf_fix_header function fails to validate a minimum chunksize when iterating over ASF objects, causing the loop pointer to never advance when a chunksize is smaller than the 24-byte minimum ASF object header size, resulting in CPU exhaustion that denies service to legitimate users.

Metadata

CVE ID: CVE-2026-64834
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-07-20 18:27 UTC
Published: 2026-07-22 17:06 UTC
Last updated: 2026-07-22 17:06 UTC
Primary CWE: CWE-835
Loop with Unreachable Exit Condition ('Infinite Loop')
Vendor / Product: FFmpeg / FFmpeg
Sources: cve.org · NVD

Severity & Metrics

7.5 HIGH CVSS 3.1

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

Affected products (1)

Vendor	Product	Platform	Versions
FFmpeg	FFmpeg	—	0.6.3 ≤ 8.1.2, 11d5f475be95d22d5f0692220cc772b116abc632

Weakness (CWE)

CWE	Source	Description
CWE-835	cna	Loop with Unreachable Exit Condition ('Infinite Loop')

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.7	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (3)