CVE-2025-69277

libsodium before ad3004e, in atypical use cases involving certain custom cryptography or untrusted data to crypto_core_ed25519_is_valid_point, mishandles checks for whether an elliptic curve point is valid because it sometimes allows points that aren't in the main cryptographic group.

• https://00f.net/2025/12/30/libsodium-vulnerability/
• https://github.com/jedisct1/libsodium/commit/ad3004ec8731730e93fcfbbc824e67eadc1c1bae
• https://github.com/pyca/pynacl/commit/96314884d88d1089ff5f336dba61d7abbcddbbf7
• https://github.com/pyca/pynacl/commit/ecf41f55a3d8f1e10ce89c61c4b4d67f3f4467cf
• https://github.com/pyca/pynacl/issues/920
• https://ianix.com/pub/ed25519-deployment.html
• https://news.ycombinator.com/item?id=46435614
• https://lists.debian.org/debian-lts-announce/2026/01/msg00004.html