Debian/libsixel: high 7.1
libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. Versions 1.8.7 and prior contain an integer overflow which leads to a heap buffer overflow via sixel_frame_convert_to_rgb
Action: Upgrade libsixel to 1:1.8.7-r2-1 or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 1:1.8.7-r2-1 | - |
Fixed versions
| 1:1.8.7-r2-1 |
Sources
- osv: DEBIAN-CVE-2026-33020#Debian:14/libsixel
- https://security-tracker.debian.org/tracker/CVE-2026-33020
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