CVE-2025-15536

Name	CVE-2025-15536
Description	A weakness has been identified in BYVoid OpenCC up to 1.1.9. This vulnerability affects the function opencc::MaxMatchSegmentation of the file src/MaxMatchSegmentation.cpp. This manipulation causes heap-based buffer overflow. The attack is restricted to local execution. The exploit has been made available to the public and could be used for attacks. Patch name: 345c9a50ab07018f1b4439776bad78a0d40778ec. To fix this issue, it is recommended to deploy a patch.
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	1126286

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
opencc (PTS)	bullseye	1.1.1+git20200624+ds2-10	vulnerable
	bookworm	1.1.6+ds1-1	vulnerable
	trixie	1.1.9+ds1-1	vulnerable
	forky, sid	1.1.9+ds1-4	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
opencc	source	(unstable)	1.1.9+ds1-4			1126286

Notes

[trixie] - opencc <no-dsa> (Minor issue)
[bookworm] - opencc <no-dsa> (Minor issue)
[bullseye] - opencc <postponed> (Minor issue)
https://github.com/BYVoid/OpenCC/issues/997
https://github.com/BYVoid/OpenCC/pull/1005
Fixed by: https://github.com/BYVoid/OpenCC/commit/345c9a50ab07018f1b4439776bad78a0d40778ec (ver.1.2.0)