OSV-2025-591 UNKNOWN READ in mov_read_header
A memory corruption vulnerability in FFmpeg's mov_read_header function allows attackers to cause a denial of service via crafted media files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2025-591?
OSV-2025-591 is a memory corruption vulnerability in mpv, published on 2 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=435536867
Crash type: UNKNOWN READ
Crash state:
mov_read_header
avformat_open_input
demux_open_lavf
Which versions are affected by OSV-2025-591?
1 open source package ship an affected version, including mpv.
| Package | Affected | Fixed in |
|---|---|---|
mpv OSS-Fuzz | All versions | None |
How do I fix OSV-2025-591?
No fix has been published for OSV-2025-591 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is OSV-2025-591 being exploited?
There is no known exploitation of OSV-2025-591 in the wild and no public exploit code.