Libgcrypt before 1.12.2 mishandles Dilithium signing. Writes to a static array lack a bounds check but do not use attacker-controlled data.

References

• https://dev.gnupg.org/T8208
• https://lists.gnupg.org/pipermail/gnupg-announce/2026q2/000503.html
• https://www.openwall.com/lists/oss-security/2026/04/21/1