CVE-2017-16803: Libav

High severity, CVSS 7.5. EPSS: 3% chance of exploitation in the next 30 days.

In Libav through 11.11 and 12.x through 12.1, the smacker_decode_tree function in libavcodec/smacker.c does not properly restrict tree recursion, which allows remote attackers to cause a denial of service (bitstream.c:build_table() out-of-bounds read and application crash) via a crafted Smacker stream.

Affected products

• Libav Libav: up to and including 11.11; version 12.0 only; version 12.1 only

Published 2017-11-13. Last modified 2026-06-17.