OSV-2026-868 Use-of-uninitialized-value in vp8_regular_quantize_b_sse4_1
An attacker can cause a denial of service in applications using libvpx by triggering a use-of-uninitialized-value bug in the VP8 quantization routine.
- 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-2026-868?
OSV-2026-868 is a memory corruption vulnerability in libvpx, published on 7 Jun 2026. 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=520318421
Crash type: Use-of-uninitialized-value
Crash state:
vp8_regular_quantize_b_sse4_1
macro_block_yrd
vp8_rd_pick_intra_mode
Which versions are affected by OSV-2026-868?
1 open source package ship an affected version, including libvpx.
| Package | Affected | Fixed in |
|---|---|---|
libvpx OSS-Fuzz | All versions | None |
How do I fix OSV-2026-868?
No fix has been published for OSV-2026-868 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-2026-868 being exploited?
There is no known exploitation of OSV-2026-868 in the wild and no public exploit code.