Vulnerability is in libavfilter/vf_quirc.c (QR decode via libquirc).
Debian's ffmpeg package does not enable --enable-libquirc (default
off; not present in debian/rules CONFIG), so the quirc filter is not
built into our binary.
Refs:
- https://security-tracker.debian.org/tracker/CVE-2026-66041
- https://github.com/FFmpeg/FFmpeg/commit/4da9812e25894fb51d62a8875cfa8eb39b5e20f5
details: |
Upstream fix resizes quirc buffers when input size changes. Clean
upstream patch applies to the source tree, but the filter is not
compiled in. If --enable-libquirc is ever added to debian/rules,
convert this to a real PATCH_TYPE_UPSTREAM_PATCH entry.