UBUNTU-CVE-2026-32877

Botan is a C++ cryptography library. From version 2.3.0 to before version 3.11.0, during SM2 decryption, the code that checked the authentication code value C3 failed to check that the encoded value was of the expected length prior to comparison. An invalid ciphertext can cause a heap over-read o...

CVE-2026-32877

CVE-2026-32877 affects Botan (C++ crypto library). From version 2.3.0 up to but not including 3.11.0, SM2 decryption incorrectly checked the length of the encoded C3 value before comparison, allowing an invalid ciphertext to cause a heap over-read of up to 31 bytes. This can lead to a crash or po...