8.2
High
CVE-2026-103601 Release of unverified plaintext in the CCM (CcmBlockCipher) and DSTU 7624 CCM (KCcmBlockCipher) AEAD modes in Legion…
Description
Release of unverified plaintext in the CCM (CcmBlockCipher) and DSTU 7624 CCM (KCcmBlockCipher) AEAD modes in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker to obtain decryptions of ciphertexts of their choosing via forged messages sent to an application that lets the output buffer of a failed decryption be observed, for example through buffer reuse or logging, because decryption wrote the recovered plaintext into the caller-supplied output buffer before checking the authentication tag and left it there when the check failed. Only decryption into a caller-supplied buffer is affected; methods that return a newly allocated array are not.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| bc-csharp 2.7 | earliest → < 2.7.0 | 2.7.0 |
Other CVEs of bc-csharp
The 21 CVEs of bc-csharp →
CVE-2026-103604
Inefficient algorithmic complexity in X.509 distinguished name string conversion (X509Name.ToString and…
8.7
High
CVE-2026-103603
Memory allocation with excessive size value in the HSS/LMS signature code (HssPublicKeyParameters, HssSignature) in…
8.7
High
CVE-2026-103602
Improper certificate validation in PkixNameConstraintValidator in Legion of the Bouncy Castle Inc
8.2
High
CVE-2026-103600
Uncontrolled recursion in the ASN.1 parser (Asn1InputStream, Asn1StreamParser) in Legion of the Bouncy Castle Inc
8.7
High