Botan: Heap Buffer Over-read in SM2 Decryption via Undersized C3 Hash Field
Summary
Botan: Heap Buffer Over-read in SM2 Decryption via Undersized C3 Hash Field
Original description
The description as published by the source.
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 of up to 31 bytes, resulting in a crash or potentially other undefined behavior. This issue has been patched in version 3.11.0.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Alpine Linux ALPINE-CVE-2026-32877 botan3 Fixed in: 3.11.0-r0
- Debian DEBIAN-CVE-2026-32877 botan
- Ubuntu UBUNTU-CVE-2026-32877 botan1.10
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov