| Name | CVE-2026-12803 |
| Description | In Bouncy Castle for Java before 1.85, KCCMBlockCipher MAC does not bind nonce when AAD is absent (cross-nonce AEAD forgery). This issue also affects Bouncy Castle for Java LTS before 2.73.12. |
| 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 | 1143536 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| bouncycastle (PTS) | bullseye | 1.68-2 | vulnerable |
| 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 | (unstable) | (unfixed) | 1143536 |
https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9012803
Fixed by: https://github.com/bcgit/bc-java/commit/697794413ebf7bc5e3fce609a707826ba52981af (r1rv85)
Fixed by: https://github.com/bcgit/bc-java/commit/7d79aa76e984da85f2a541cae8ba2ae56e1713bc (r1rv85)