CVE-2026-41509

CRITICAL9.8

Integer underflow in crypto_sign_open() leads to buffer overflow

Published May 8, 2026

Modified 1 weeks ago

Details

CROSS implementation contains reference and optimized implementations of the CROSS post-quantum signature algorithm. Prior to commit fc6b7e7, there is a buffer overflow in crypto_sign_open() caused by an underflow of the integer mlen. This issue has been patched via commit fc6b7e7.

References

WEB

https://github.com/CROSS-signature/CROSS-implementation/commit/fc6b7e78cdf789bb5c395a81dc601356f1383da0

WEB

https://github.com/CROSS-signature/CROSS-implementation/security/advisories/GHSA-w72c-hgx8-p7cv

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-41509

CVSS Analysis

CVSS v4.0

6.9

Exploitability

Attack Vector