🛡️ CVE-2026-22791 — opencryptoki

🟡 CVSS 6.6 — Medium ⚠️ Exploit Public CWE-131 NVD

6.6

CVSS Score

0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability high.

Weakness class

CVE-2026-22791 is classified as CWE-131: Incorrect Buffer Size Calculation. The size computed for an allocation does not match what is later written into it, producing an overflow.

Affected software

CVE-2026-22791 is recorded against 1 package.

opencryptoki

Timeline and source

Published on 13 January 2026 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
github.com
github.com

CVE-2026-22791 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Ubuntu

Details

Severity MEDIUM

CVSS Score 6.6

CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H

CWE CWE-131

Public Exploit ⚠️ Yes

Source NVD

Published 2026-01-13

Updated 2026-08-11

Modified 2026-06-17

Fix URL https://github.com/opencryptoki/opencryptoki/commit/785d7577e1477d12fbe235554e7e7b24f2de34b7

Affected Packages

Software	From version	Fixed in
opencryptoki	—	—

References

Patch https://github.com/opencryptoki/opencryptoki/commit/785d7577e1477d12fbe235554e7e7b24f2de34b7

Patch https://github.com/opencryptoki/opencryptoki/commit/e37e9127deeeb7bf3c3c4d852c594256c57ec3a8

Exploit, Patch, Vendor Advisory https://github.com/opencryptoki/opencryptoki/security/advisories/GHSA-26f5-3mwq-4wm7

🔗 NVD 🔗 Mitre ✅ Fix / Advisory

Similar Threats

Exploit Protection

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