CVE-2026-52295 | CVE Tracker

Description

FFmpeg before 9.0 has an out-of-bounds read because the copied extradata lacked required padding before GetBitContext-based access in libavformat/iamf_writer.c.

Scores

CVSS scores of CVE-2026-52295, by who scored it
Scored by	CVSS	Score	Vector
mitreCNA (assigner)	3.1	Low2.9	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA-ADPADP (enrichment)	3.1	Medium6.2	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVDNVD · Analyzed	3.1	Low2.9	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS (exploitation in 30 days): 0.18% · top 93% of all CVEs (5 Nov 2026)
CISA SSVC: Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 2.9.

Weakness

CWE-125 Out-of-bounds Read (opens in a new tab)All about CWE-125 and its CVEs
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') (opens in a new tab)All about CWE-120 and its CVEs

Affected products

FFmpeg · FFmpeg
- affected < 9.0

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

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Record last updated 13 Sept 2026, 21:58 UTC.

FFmpeg before 9.0 has an out-of-bounds read because the copied extradata lacked required padding before GetBitContext-based access in…