Description
Libsixel 1.8.3 contains a heap-based buffer overflow in the sixel_encode_highcolor function in tosixel.c.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libsixel | 1.8.6-1 | — |
| Debian 13 | libsixel | 1.8.6-1 | — |
| Debian 12 | libsixel | 1.8.6-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | libsixel | No fix yet | — |
| Ubuntu 18.04 LTS | libsixel | No fix yet | — |
| Ubuntu 16.04 LTS | libsixel | No fix yet | — |