CVE-2026-42046

Name	CVE-2026-42046
Description	libcaca is a colour ASCII art library. In 0.99.beta20 and earlier, an integer overflow vulnerability in libcaca's canvas import functionality allows an attacker to cause a controlled heap out-of-bounds write (heap overflow) by supplying a crafted file in the "caca" format. Depending on the build configuration and memory allocator, this may lead to memory corruption or remote code execution. This is the same vulnerability as CVE-2021-3410 but the fix at that time was not fully correct. Commit fb77acff9ba6bb01d53940da34fb10f20b156a23 fixes this vulnerability.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1136952

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libcaca (PTS)	bullseye	0.99.beta19-2.2	vulnerable
	bullseye (security)	0.99.beta19-2.2+deb11u1	vulnerable
	bookworm	0.99.beta20-3	vulnerable
	trixie	0.99.beta20-5	vulnerable
	forky, sid	0.99.beta20-7	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libcaca	source	(unstable)	0.99.beta20-7			1136952

Notes

[trixie] - libcaca <no-dsa> (Minor issue)
[bookworm] - libcaca <no-dsa> (Minor issue)
https://github.com/cacalabs/libcaca/security/advisories/GHSA-4vvg-vrqv-m56w
https://github.com/cacalabs/libcaca/issues/86
Fixed by: https://github.com/cacalabs/libcaca/commit/fb77acff9ba6bb01d53940da34fb10f20b156a23