EUVD-2026-95586

In Bouncy Castle for Java LTS before 2.73.13, the native one-shot CTR packet cipher did not check that the requested input length fitted the counter space the IV left. In CTR mode the IV and the block counter share one 16-byte block, so an IV of 13 to 15 bytes leaves a counter of only 1 to 3 byte...

CVE-2026-71884

In Bouncy Castle for Java LTS versions before 2.73.13 , a vulnerability exists in the native one-shot CTR packet cipher . The component fails to verify if the requested input length fits the remaining counter space left by an IV of 13 to 15 bytes. This allows the counter to wrap, causing the keys...