bouncycastle: In Bouncy Castle for Java before 1.85, DTLS handshake reassembler allocates buffer from unchecked 24-bit length
CVE-2026-59646 is fixed in 7 products on 1 platform, first by DEBIAN-CVE-2026-59646, released August 3, 2026. It is not reported as exploited. Patch Radar priority: High.
In Bouncy Castle for Java before 1.85, DTLS handshake reassembler allocates buffer from unchecked 24-bit length. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bctls-fips 1.0.24 (1.0.X series), 2.0.24 (2.0.X series) and 2.1.24 (2.1.X series).
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bouncycastle · Debian 14 | 1.86-1 | DEBIAN-CVE-2026-59646 | Aug 3, 2026 |
| bouncycastle · amzn 2023 | 1.70-4.amzn2023.0.8 | ALAS2023-2026-2153 | Sep 14, 2026 |
| bouncycastle · opensuse-leap 16.0 | 1.85-160000.1.1 | OPENSUSE-SU-2026:21538-1 | Aug 6, 2026 |
| bouncycastle · sles 15.6 | 1.85-150200.3.38.1 | SUSE-SU-2026:3559-1 | Aug 10, 2026 |
| bouncycastle · sles 15.7 | 1.85-150200.3.38.1 | SUSE-SU-2026:3559-1 | Aug 10, 2026 |
| bouncycastle · sles 16.0 | 1.85-160000.1.1 | SUSE-SU-2026:23150-1 | Aug 6, 2026 |
| bouncycastle-javadoc · amzn 2023 | 1.70-4.amzn2023.0.8 | ALAS2023-2026-2153 | Sep 14, 2026 |
| bouncycastle-mail · amzn 2023 | 1.70-4.amzn2023.0.8 | ALAS2023-2026-2153 | Sep 14, 2026 |
| bouncycastle-pg · amzn 2023 | 1.70-4.amzn2023.0.8 | ALAS2023-2026-2153 | Sep 14, 2026 |
| bouncycastle-pkix · amzn 2023 | 1.70-4.amzn2023.0.8 | ALAS2023-2026-2153 | Sep 14, 2026 |
| bouncycastle-tls · amzn 2023 | 1.70-4.amzn2023.0.8 | ALAS2023-2026-2153 | Sep 14, 2026 |
| bouncycastle-util · amzn 2023 | 1.70-4.amzn2023.0.8 | ALAS2023-2026-2153 | Sep 14, 2026 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.