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.

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Fixes

Solution

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Workaround

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History

Tue, 12 May 2026 14:30:00 +0000

Type Values Removed Values Added
First Time appeared Cross-crypto
Cross-crypto cross-implementation
CPEs cpe:2.3:a:cross-crypto:cross-implementation:*:*:*:*:*:*:*:*
Vendors & Products Cross-crypto
Cross-crypto cross-implementation
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Sun, 10 May 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Cross-signature
Cross-signature cross-implementation
Vendors & Products Cross-signature
Cross-signature cross-implementation

Fri, 08 May 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 08 May 2026 14:00:00 +0000

Type Values Removed Values Added
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.
Title Integer underflow in crypto_sign_open() leads to buffer overflow
Weaknesses CWE-121
CWE-122
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-08T14:15:21.680Z

Reserved: 2026-04-20T18:18:50.681Z

Link: CVE-2026-41509

cve-icon Vulnrichment

Updated: 2026-05-08T14:15:17.954Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-08T14:16:34.287

Modified: 2026-05-12T14:15:13.230

Link: CVE-2026-41509

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-10T21:25:21Z

Weaknesses