libsixel: libsixel before 1.8.7-r1 and 1.9.0 through 1.10.5 contains a heap out-of-bounds write vulnerability in gif_init_frame...
CVE-2026-110601 is fixed in libsixel on 1 platform by DEBIAN-CVE-2026-110601 (version 1:1.8.7-r2-1), released October 18, 2026. It is not reported as exploited. Patch Radar priority: Routine.
libsixel before 1.8.7-r1 and 1.9.0 through 1.10.5 contains a heap out-of-bounds write vulnerability in gif_init_frame() in src/fromgif.c, which never checks the GIF transparent color index against the palette size. Attackers can supply a crafted GIF with a small color table and large transparent index, processed with a background color set, to write bytes past the palette buffer, causing heap corruption or crashes.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libsixel · Debian 14 | 1:1.8.7-r2-1 | DEBIAN-CVE-2026-110601 | Oct 18, 2026 |
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