CVE-2026-5598

Name	CVE-2026-5598
Description	Covert timing channel vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA core on all (core modules). This vulnerability is associated with program files FrodoEngine.Java. This issue affects BC-JAVA: from 1.71 before 1.80.2, from 1.81 before 1.80.1, from 1.82 before 1.84.
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	1134386

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
bouncycastle (PTS)	bullseye	1.68-2	fixed
	bookworm	1.72-2	vulnerable
	forky, sid, trixie	1.80-3	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
bouncycastle	source	bullseye	(not affected)
bouncycastle	source	(unstable)	(unfixed)			1134386

Notes

[bullseye] - bouncycastle <not-affected> (Vulnerable code introduced in 1.71)
https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%905598
Fixed by: https://github.com/bcgit/bc-java/commit/94abbd56413dfdac651fd878bc60253871ef5e87 (r1rv84)