Array index error in gd_gif_in.c in the bundled GD graphics library (libgd
before 2.0.35), reached via the GIF reader (gdImageCreateFromGif). libwmf
carries its own copy of GD under src/extra/gd and compiles it (Debian does
not build-depend on libgd-dev, so LIBWMF_OPT_SYS_GD is off), but that copy
ships no GIF reader at all: there is no gd_gif_in.c/gd_gif_out.c and
libgd_la_SOURCES in src/extra/gd/Makefile.am compiles no GIF source. libwmf
uses GD only as a rasterization/output backend and never decodes GIF input.
The vulnerable code is not present or reachable in this package; scanners
flag it only via Debian's stale source-package match (trixie is "unimportant
/ unfixed" while standalone libgd2 is fixed).