OSV-2025-534 Heap-use-after-free in ih264_inter_pred_luma_horz_ssse3
A heap-use-after-free in the H.264 decoder allows attackers to execute arbitrary code or cause denial of service via crafted video files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2025-534?
OSV-2025-534 is an use after free vulnerability in libavc, published on 8 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=428771938
Crash type: Heap-use-after-free READ 16
Crash state:
ih264_inter_pred_luma_horz_ssse3
ih264d_motion_compensate_mp
isvcd_decode_recon_tfr_nmb_non_base_lyr
Which versions are affected by OSV-2025-534?
1 open source package ship an affected version, including libavc.
| Package | Affected | Fixed in |
|---|---|---|
libavc OSS-Fuzz | All versions | None |
How do I fix OSV-2025-534?
No fix has been published for OSV-2025-534 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is OSV-2025-534 being exploited?
There is no known exploitation of OSV-2025-534 in the wild and no public exploit code.