openCryptoki up to 3.26.0 on Linux/AIX CKM_ECDH_AES_KEY_WRAP buffer size

Summaryinfo

A vulnerability classified as problematic has been found in openCryptoki up to 3.26.0 on Linux/AIX. This vulnerability affects unknown code of the component CKM_ECDH_AES_KEY_WRAP. The manipulation leads to buffer size. This vulnerability is documented as CVE-2026-22791. The attack needs to be performed locally. There is not any exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in openCryptoki up to 3.26.0 on Linux/AIX and classified as problematic. This issue affects some unknown processing of the component CKM_ECDH_AES_KEY_WRAP. The manipulation with an unknown input leads to a buffer size vulnerability. Using CWE to declare the problem leads to CWE-131. The product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-22791 since 01/09/2026. The exploitation is known to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 284798 (Linux Distros Unpatched Vulnerability : CVE-2026-22791), which helps to determine the existence of the flaw in a target environment.

Applying the patch 785d7577e1477d12fbe235554e7e7b24f2de34b7 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (284798). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

• openCryptoki

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22
• 3.23
• 3.24
• 3.25
• 3.26.0

License

• open-source

Website

• Product: https://github.com/opencryptoki/opencryptoki/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

Discussion