VIR Vulnerability Intelligence Relay

CVE-2026-41509

critical
Published 2026-05-08 · Modified 2026-05-12
CVSS v3
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v2
—
VIR risk
9.8

Description

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.

Predictions

Exploit likelihood
97%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

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

vendor Authored 2026-05-27

Vendor advisory: security-advisories@github.com — https://github.com/CROSS-signature/CROSS-implementation/commit/fc6b7e78cdf789bb5c395a81dc601356f1383da0

Application impact
VendorProductVersionsFixed
cross-cryptocross-implementation{"endExcluding":"2026-03-23"}2026-03-23

References

CWEs

CWE-121 CWE-122

Verify integrity in audit chain (admin only). AS-IS.