OSV-2025-808 Use-of-uninitialized-value in WebPMultRow_C
An attacker can cause a denial of service in applications using the WebP library by triggering a use-of-uninitialized-value error during image rescaling.
- 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-2025-808?
OSV-2025-808 is a memory corruption vulnerability in libwebp, published on 4 Oct 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=448792425
Crash type: Use-of-uninitialized-value
Crash state:
WebPMultRow_C
WebPMultRows
WebPPictureRescale
Which versions are affected by OSV-2025-808?
1 open source package ship an affected version, including libwebp.
| Package | Affected | Fixed in |
|---|---|---|
libwebp OSS-Fuzz | All versions | None |
How do I fix OSV-2025-808?
No fix has been published for OSV-2025-808 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-2025-808 being exploited?
There is no known exploitation of OSV-2025-808 in the wild and no public exploit code.