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CVE-2026-22791— openCryptoki incorrectly calculates the buffer size in C_WrapKey with CKM_ECDH_AES_KEY_WRAP

Quick assessment

Affected
opencryptoki opencryptoki
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

openCryptoki是openCryptoki开源的一个适用于 Linux 的 PKCS#11 库和工具。 openCryptoki 3.25.0版本和3.26.0版本存在安全漏洞，该漏洞源于CKM_ECDH_AES_KEY_WRAP实现存在堆缓冲区溢出，可能导致堆损坏或拒绝服务。

CVSS 6.6 · Medium EPSS 0.28% · P18

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2026-22791

Vulnerability Information
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Vulnerability Title
openCryptoki incorrectly calculates the buffer size in C_WrapKey with CKM_ECDH_AES_KEY_WRAP
Source: CVE Program / CVE List V5
Vulnerability Description
openCryptoki is a PKCS#11 library and tools for Linux and AIX. In 3.25.0 and 3.26.0, there is a heap buffer overflow vulnerability in the CKM_ECDH_AES_KEY_WRAP implementation allows an attacker with local access to cause out-of-bounds writes in the host process by supplying a compressed EC public key and invoking C_WrapKey. This can lead to heap corruption, or denial-of-service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区大小计算不正确
Source: CVE Program / CVE List V5
Vulnerability Title
openCryptoki 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
openCryptoki是openCryptoki开源的一个适用于 Linux 的 PKCS#11 库和工具。 openCryptoki 3.25.0版本和3.26.0版本存在安全漏洞，该漏洞源于CKM_ECDH_AES_KEY_WRAP实现存在堆缓冲区溢出，可能导致堆损坏或拒绝服务。
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
opencryptoki opencryptoki >= 3.25.0, <= 3.26.0 -

II. Public POCs for CVE-2026-22791

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III. Intelligence Information for CVE-2026-22791

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Vendor Advisories for CVE-2026-22791 (1)

IV. Related Vulnerabilities

Same product: opencryptoki
Same vendor: opencryptoki
Same weakness: CWE-131

V. Comments for CVE-2026-22791

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