ECHO-966C-4616-ACC0 CPU-consumption DoS in gdImageArc/gdImageFilledArc (libgd before 2.0.35) via a very large start/end angle, which drove the unbounded arc loop. The libgd 2.0.35 fix — normalizing the angles and clamping the sweep to <= 360 before the drawing loop — is already present in this trixie source: gdImageFilledArc in src/extra/gd/gd.c reduces s/e modulo 360 and rewinds e to s (the block preceding "for (i = s; (i <= e); i++)"), so the loop runs at most ~720 iterations regardless of the requested angle. There is nothing to backport; the vulnerability does not reproduce against 0.2.13. Debian rates trixie "unimportant".