CVE-2026-41509— Integer underflow in crypto_sign_open() leads to buffer overflow
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I. Basic Information for CVE-2026-41509
Vulnerability Information
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Vulnerability Title
Integer underflow in crypto_sign_open() leads to buffer overflow
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
栈缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
CROSS-implementation 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CROSS-implementation是CROSS Signature team开源的一个非对称签名算法的C语言实现库。 CROSS-implementation存在安全漏洞，该漏洞源于crypto_sign_open()函数中整数mlen下溢，可能导致缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| CROSS-signature | CROSS-implementation | < fc6b7e78cdf789bb5c395a81dc601356f1383da0 | - |
II. Public POCs for CVE-2026-41509
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
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