CVE-2026-15997

Name	CVE-2026-15997
Description	Out-of-bounds write vulnerability in Legion of the Bouncy Castle Inc. BC-LTS bcprov-lts8on on ARM allows Overflow Buffers. This vulnerability is associated with program files https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/shake.C, https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/sha3.C. This issue affects BC-LTS: from 2.73.0 before 2.73.12.1. Issue is only applicable if application involved is accepting memoable SHA3 / SHAKE states from potentially untrusted sources.
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)

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	fixed
	forky, sid, trixie	1.80-3	fixed

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

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

Notes

- bouncycastle <not-affected> (Vulnerable code not present)
https://github.com/bcgit/bc-lts-java/wiki/CVE%E2%80%902026%E2%80%9015997
https://github.com/bcgit/bc-lts-java/commit/f5df0d2ac1fce2454a8efb55ffd5b08011858c89 (r2rv73dot12dot1)