OSV-2020-1855

Heap-buffer-overflow in WelsDec::UpdateP16x16MotionInfo

No scoreFix available

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=25961

Crash type: Heap-buffer-overflow WRITE 4
Crash state:
WelsDec::UpdateP16x16MotionInfo
WelsDec::ParseInterPMotionInfoCabac
WelsDec::WelsDecodeMbCabacPSliceBaseMode0

What each source reports

OSV No score

Heap-buffer-overflow in WelsDec::UpdateP16x16MotionInfo

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=25961

Crash type: Heap-buffer-overflow WRITE 4
Crash state:
WelsDec::UpdateP16x16MotionInfo
WelsDec::ParseInterPMotionInfoCabac
WelsDec::WelsDecodeMbCabacPSliceBaseMode0

Record: OSV-2020-1855
Updated: 2026-11-02

Affected packages

Affected packages
Package	Affected	Fixed
`openh264` OSS-Fuzz	Commit ranges	Not evaluated

Not evaluated means the source gave git commits or a range we can't read, so we can't tell which releases are affected. A fixed version beside it is the source’s own claim.

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

OSV-2020-1855 is a vulnerability with no CVSS score yet in openh264, published September 27, 2020. No source lists public exploit code. A source reports a fix.

References

bugs.chromium.org/p/oss-fuzz/issues/detail?id=25961