There is an illegal address access in the build_table function in libavcodec/bitstream.c of Libav 12.1 that will lead to remote denial of service via crafted input.
Severity
CVSS 3.0
7.5 high
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
1.6% chance of exploitation in the next 30 days; higher than 76% of CVEs (scores of 2026-10-31)