TI-2026-18309 Aliases CVE-2026-22791

openCryptoki incorrectly calculates the buffer size in C_WrapKey with CKM_ECDH_AES_KEY_WRAP

LOW 29CWE-131Published 2026-01-13 · Updated 2026-01-13

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: Low · Low · High
Fix status: Deferred Red Hat: fix deferred

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00284 21st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Deferred Red Hat: fix deferred

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
opencryptoki	opencryptoki	3.25.0 – 3.26.0	—	No fix listed	CNA

opencryptoki Vendoropencryptoki Affected 3.25.0 – 3.26.0 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:opencryptoki_project:opencryptoki:3.25.0:::::::*	3.25.0	Vulnerable	opencryptoki
cpe:2.3:a:opencryptoki_project:opencryptoki:3.26.0:::::::*	3.26.0	Vulnerable	opencryptoki

cpe:2.3:a:opencryptoki_project:opencryptoki:3.25.0:*:*:*:*:*:*:* Versions 3.25.0 Vulnerable ·opencryptoki
cpe:2.3:a:opencryptoki_project:opencryptoki:3.26.0:*:*:*:*:*:*:* Versions 3.26.0 Vulnerable ·opencryptoki

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred

Not affected: 3 products

Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8

Timeline

2026-10-02 Threatist record created from CVE-2026-22791

References

Exploit 1

https://github.com/opencryptoki/opencryptoki/security/advisories/GHSA-26f5-3mwq-4wm7

Patch 2

TI-2026-29047 openCryptoki: Memory safety vulnerabilities in BER/DER decoders in asn1.c CVSS 3.1MEDIUM 6.8
TI-2026-19251 openCryptoki has improper link resolution before file access (link following) CVSS 3.1MEDIUM 6.8
TI-2024-00843 Opencryptoki: timing side-channel in handling of rsa pkcs#1 v1.5 padded ciphertexts (marvin) CVSS 3.1MEDIUM 5.9
TI-2012-03797 openCryptoki 2.4.1 allows local users to create or set world-writable permissions on… CVSS 2.0MEDIUM 6.2
TI-2021-02729 Information disclosure in opencryptoki CVSS 3.1MEDIUM 5.5
TI-2012-03796 openCryptoki before 2.4.1, when using spinlocks, allows local users to create or set… CVSS 2.0LOW 2.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences