# CVE-2026-23893: libopencryptoki0: openCryptoki is a PKCS#11 library and provides tooling for Linux and AIX

CVE-2026-23893 is fixed in 19 products on 1 platform, first by RHSA-2026:5917, released January 22, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-23893
- Priority: Routine
- CVSS: 6.8 (Medium)
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 21, 2026

## Description

openCryptoki is a PKCS#11 library and provides tooling for Linux and AIX. Versions 2.3.2 and above are vulnerable to symlink-following when running in privileged contexts. A token-group user can redirect file operations to arbitrary filesystem targets by planting symlinks in group-writable token directories, resulting in privilege escalation or data exposure. Token and lock directories are 0770 (group-writable for token users), so any token-group member can plant files and symlinks inside them. When run as root, the base code handling token directory file access, as well as several openCryptoki tools used for administrative purposes, may reset ownership or permissions on existing files inside the token directories. An attacker with token-group membership can exploit the system when an administrator runs a PKCS#11 application or administrative tool that performs chown on files inside the token directory during normal maintenance. This issue is fixed in commit 5e6e4b4, but has not been included in a released version at the time of publication.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libopencryptoki0 Ubuntu 22.04.1 LTS (jammy) | 3.17.0+dfsg+20220202.b40982e-0ubuntu1.3 | [libopencryptoki0 3.17.0+dfsg+20220202.b40982e-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libopencryptoki0-3.17.0-dfsg-20220202.b40982e-0ubuntu1.3.md) | Apr 16, 2026 |
| Linux | libopencryptoki0 Ubuntu 24.04.5 LTS (noble) | 3.23.0+dfsg-0ubuntu3.1 | [libopencryptoki0 3.23.0+dfsg-0ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libopencryptoki0-3.23.0-dfsg-0ubuntu3.1.md) | Apr 16, 2026 |
| Linux | libopencryptoki0 Ubuntu 26.04.1 LTS (resolute) | 3.26.0+dfsg-0ubuntu1.1 | [libopencryptoki0 3.26.0+dfsg-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libopencryptoki0-3.26.0-dfsg-0ubuntu1.1.md) | Apr 16, 2026 |
| Linux | openCryptoki opensuse-leap 15.6 | 3.23.0-150600.3.14.1 | [SUSE-SU-2026:0351-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0351-1.md) | Jan 30, 2026 |
| Linux | openCryptoki opensuse-leap 16.0 | 3.27.0-160000.1.1 | [OPENSUSE-SU-2026:21059-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21059-1.md) | Jun 25, 2026 |
| Linux | openCryptoki sles 15.7 | 3.26.0-150700.5.12.1 | [SUSE-SU-2026:0481-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0481-1.md) | Feb 12, 2026 |
| Linux | openCryptoki sles 16.0 | 3.27.0-160000.1.1 | [SUSE-SU-2026:22365-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22365-1.md) | Jun 25, 2026 |
| Linux | opencryptoki Debian 13.5 (trixie) | 3.23.0+dfsg-0.3+deb13u1 | [DEBIAN-CVE-2026-23893](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23893.md) | Jan 22, 2026 |
| Linux | opencryptoki Debian 14 | 3.27.0-1 | [DEBIAN-CVE-2026-23893](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23893.md) | Jan 22, 2026 |
| Linux | opencryptoki Fedora 43 | 3.26.0-3.fc43 | [FEDORA-2026-6C3B6EC624](https://patchblox.com/security/data/fix/linux/fedora-2026-6c3b6ec624.md) | May 5, 2026 |
| Linux | opencryptoki RHEL 10 | 3.24.0-6.el10_0.1 | [RHSA-2026:5917](https://patchblox.com/security/data/fix/linux/rhsa-2026-5917.md) | Jan 22, 2026 |
| Linux | opencryptoki RHEL 8 | 0:3.22.0-3.el8_10.2 | [RHSA-2026:5587](https://patchblox.com/security/data/fix/linux/rhsa-2026-5587.md) | Apr 15, 2026 |
| Linux | opencryptoki RHEL 9 | 0:3.25.0-4.el9_7.2 | [RHSA-2026:5603](https://patchblox.com/security/data/fix/linux/rhsa-2026-5603.md) | Apr 15, 2026 |
| Linux | opencryptoki Ubuntu 22.04.1 LTS (jammy) | 3.17.0+dfsg+20220202.b40982e-0ubuntu1.3 | [opencryptoki 3.17.0+dfsg+20220202.b40982e-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-opencryptoki-3.17.0-dfsg-20220202.b40982e-0ubuntu1.3.md) | Apr 16, 2026 |
| Linux | opencryptoki Ubuntu 24.04.5 LTS (noble) | 3.23.0+dfsg-0ubuntu3.1 | [opencryptoki 3.23.0+dfsg-0ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-opencryptoki-3.23.0-dfsg-0ubuntu3.1.md) | Apr 16, 2026 |
| Linux | opencryptoki Ubuntu 26.04.1 LTS (resolute) | 3.26.0+dfsg-0ubuntu1.1 | [opencryptoki 3.26.0+dfsg-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-opencryptoki-3.26.0-dfsg-0ubuntu1.1.md) | Apr 16, 2026 |
| Linux | opencryptoki almalinux 8 | 3.22.0-3.el8_10.2 | [ALSA-2026:5587](https://patchblox.com/security/data/fix/linux/alsa-2026-5587.md) | Mar 24, 2026 |
| Linux | opencryptoki almalinux 9 | 3.25.0-4.el9_7.2 | [ALSA-2026:5603](https://patchblox.com/security/data/fix/linux/alsa-2026-5603.md) | Mar 24, 2026 |
| Linux | opencryptoki ol 10 | 0:3.25.0-5.el10_1.2 | [ELSA-2026-4717](https://patchblox.com/security/data/fix/linux/elsa-2026-4717.md) | Mar 17, 2026 |
| Linux | opencryptoki ol 8 | 0:3.22.0-3.el8_10.2 | [ELSA-2026-5587](https://patchblox.com/security/data/fix/linux/elsa-2026-5587.md) | Mar 24, 2026 |
| Linux | opencryptoki ol 9 | 0:3.25.0-4.el9_7.2 | [ELSA-2026-5603](https://patchblox.com/security/data/fix/linux/elsa-2026-5603.md) | Mar 24, 2026 |
| Linux | opencryptoki rocky 10 | 0:3.25.0-5.el10_1.2 | [RLSA-2026:4717](https://patchblox.com/security/data/fix/linux/rlsa-2026-4717.md) | Mar 27, 2026 |
| Linux | opencryptoki rocky 8 | 0:3.22.0-3.el8_10.2 | [RLSA-2026:5587](https://patchblox.com/security/data/fix/linux/rlsa-2026-5587.md) | Apr 7, 2026 |
| Linux | opencryptoki rocky 9 | 0:3.25.0-4.el9_7.2 | [RLSA-2026:5603](https://patchblox.com/security/data/fix/linux/rlsa-2026-5603.md) | Apr 7, 2026 |
| Linux | opencryptoki-ccatok Fedora 43 | 3.26.0-3.fc43 | [FEDORA-2026-6C3B6EC624](https://patchblox.com/security/data/fix/linux/fedora-2026-6c3b6ec624.md) | May 5, 2026 |
| Linux | opencryptoki-ccatok RHEL 8 | 0:3.22.0-3.el8_10.2 | [RHSA-2026:5587](https://patchblox.com/security/data/fix/linux/rhsa-2026-5587.md) | Apr 15, 2026 |
| Linux | opencryptoki-ccatok RHEL 9 | 0:3.25.0-4.el9_7.2 | [RHSA-2026:5603](https://patchblox.com/security/data/fix/linux/rhsa-2026-5603.md) | Apr 15, 2026 |
| Linux | opencryptoki-ccatok almalinux 8 | 3.22.0-3.el8_10.2 | [ALSA-2026:5587](https://patchblox.com/security/data/fix/linux/alsa-2026-5587.md) | Mar 24, 2026 |
| Linux | opencryptoki-ccatok almalinux 9 | 3.25.0-4.el9_7.2 | [ALSA-2026:5603](https://patchblox.com/security/data/fix/linux/alsa-2026-5603.md) | Mar 24, 2026 |
| Linux | opencryptoki-ccatok ol 10 | 0:3.25.0-5.el10_1.2 | [ELSA-2026-4717](https://patchblox.com/security/data/fix/linux/elsa-2026-4717.md) | Mar 17, 2026 |
| Linux | opencryptoki-ccatok ol 9 | 0:3.25.0-4.el9_7.2 | [ELSA-2026-5603](https://patchblox.com/security/data/fix/linux/elsa-2026-5603.md) | Mar 24, 2026 |
| Linux | opencryptoki-ccatok-debuginfo Fedora 43 | 3.26.0-3.fc43 | [FEDORA-2026-6C3B6EC624](https://patchblox.com/security/data/fix/linux/fedora-2026-6c3b6ec624.md) | May 5, 2026 |
| Linux | opencryptoki-debuginfo Fedora 43 | 3.26.0-3.fc43 | [FEDORA-2026-6C3B6EC624](https://patchblox.com/security/data/fix/linux/fedora-2026-6c3b6ec624.md) | May 5, 2026 |
| Linux | opencryptoki-debugsource Fedora 43 | 3.26.0-3.fc43 | [FEDORA-2026-6C3B6EC624](https://patchblox.com/security/data/fix/linux/fedora-2026-6c3b6ec624.md) | May 5, 2026 |
| Linux | opencryptoki-devel Fedora 43 | 3.26.0-3.fc43 | [FEDORA-2026-6C3B6EC624](https://patchblox.com/security/data/fix/linux/fedora-2026-6c3b6ec624.md) | May 5, 2026 |
| Linux | opencryptoki-devel RHEL 8 | 0:3.22.0-3.el8_10.2 | [RHSA-2026:5587](https://patchblox.com/security/data/fix/linux/rhsa-2026-5587.md) | Apr 15, 2026 |
| Linux | opencryptoki-devel RHEL 9 | 0:3.25.0-4.el9_7.2 | [RHSA-2026:5603](https://patchblox.com/security/data/fix/linux/rhsa-2026-5603.md) | Apr 15, 2026 |
| Linux | opencryptoki-devel almalinux 10 | 3.25.0-5.el10_1.2 | [ALSA-2026:4717](https://patchblox.com/security/data/fix/linux/alsa-2026-4717.md) | Mar 17, 2026 |
| Linux | opencryptoki-devel almalinux 8 | 3.22.0-3.el8_10.2 | [ALSA-2026:5587](https://patchblox.com/security/data/fix/linux/alsa-2026-5587.md) | Mar 24, 2026 |
| Linux | opencryptoki-devel almalinux 9 | 3.25.0-4.el9_7.2 | [ALSA-2026:5603](https://patchblox.com/security/data/fix/linux/alsa-2026-5603.md) | Mar 24, 2026 |
| Linux | opencryptoki-devel ol 10 | 0:3.25.0-5.el10_1.2 | [ELSA-2026-4717](https://patchblox.com/security/data/fix/linux/elsa-2026-4717.md) | Mar 17, 2026 |
| Linux | opencryptoki-devel ol 8 | 0:3.22.0-3.el8_10.2 | [ELSA-2026-5587](https://patchblox.com/security/data/fix/linux/elsa-2026-5587.md) | Mar 24, 2026 |
| Linux | opencryptoki-devel ol 9 | 0:3.25.0-4.el9_7.2 | [ELSA-2026-5603](https://patchblox.com/security/data/fix/linux/elsa-2026-5603.md) | Mar 24, 2026 |
| Linux | opencryptoki-ep11tok Fedora 43 | 3.26.0-3.fc43 | [FEDORA-2026-6C3B6EC624](https://patchblox.com/security/data/fix/linux/fedora-2026-6c3b6ec624.md) | May 5, 2026 |
| Linux | opencryptoki-ep11tok RHEL 8 | 0:3.22.0-3.el8_10.2 | [RHSA-2026:5587](https://patchblox.com/security/data/fix/linux/rhsa-2026-5587.md) | Apr 15, 2026 |
| Linux | opencryptoki-ep11tok RHEL 9 | 0:3.25.0-4.el9_7.2 | [RHSA-2026:5603](https://patchblox.com/security/data/fix/linux/rhsa-2026-5603.md) | Apr 15, 2026 |
| Linux | opencryptoki-ep11tok almalinux 8 | 3.22.0-3.el8_10.2 | [ALSA-2026:5587](https://patchblox.com/security/data/fix/linux/alsa-2026-5587.md) | Mar 24, 2026 |
| Linux | opencryptoki-ep11tok almalinux 9 | 3.25.0-4.el9_7.2 | [ALSA-2026:5603](https://patchblox.com/security/data/fix/linux/alsa-2026-5603.md) | Mar 24, 2026 |
| Linux | opencryptoki-ep11tok-debuginfo Fedora 43 | 3.26.0-3.fc43 | [FEDORA-2026-6C3B6EC624](https://patchblox.com/security/data/fix/linux/fedora-2026-6c3b6ec624.md) | May 5, 2026 |
| Linux | opencryptoki-icatok Fedora 43 | 3.26.0-3.fc43 | [FEDORA-2026-6C3B6EC624](https://patchblox.com/security/data/fix/linux/fedora-2026-6c3b6ec624.md) | May 5, 2026 |
| Linux | opencryptoki-icatok RHEL 8 | 0:3.22.0-3.el8_10.2 | [RHSA-2026:5587](https://patchblox.com/security/data/fix/linux/rhsa-2026-5587.md) | Apr 15, 2026 |
| Linux | opencryptoki-icatok RHEL 9 | 0:3.25.0-4.el9_7.2 | [RHSA-2026:5603](https://patchblox.com/security/data/fix/linux/rhsa-2026-5603.md) | Apr 15, 2026 |
| Linux | opencryptoki-icatok almalinux 8 | 3.22.0-3.el8_10.2 | [ALSA-2026:5587](https://patchblox.com/security/data/fix/linux/alsa-2026-5587.md) | Mar 24, 2026 |
| Linux | opencryptoki-icatok almalinux 9 | 3.25.0-4.el9_7.2 | [ALSA-2026:5603](https://patchblox.com/security/data/fix/linux/alsa-2026-5603.md) | Mar 24, 2026 |
| Linux | opencryptoki-icatok-debuginfo Fedora 43 | 3.26.0-3.fc43 | [FEDORA-2026-6C3B6EC624](https://patchblox.com/security/data/fix/linux/fedora-2026-6c3b6ec624.md) | May 5, 2026 |
| Linux | opencryptoki-icsftok Fedora 43 | 3.26.0-3.fc43 | [FEDORA-2026-6C3B6EC624](https://patchblox.com/security/data/fix/linux/fedora-2026-6c3b6ec624.md) | May 5, 2026 |
| Linux | opencryptoki-icsftok RHEL 8 | 0:3.22.0-3.el8_10.2 | [RHSA-2026:5587](https://patchblox.com/security/data/fix/linux/rhsa-2026-5587.md) | Apr 15, 2026 |
| Linux | opencryptoki-icsftok RHEL 9 | 0:3.25.0-4.el9_7.2 | [RHSA-2026:5603](https://patchblox.com/security/data/fix/linux/rhsa-2026-5603.md) | Apr 15, 2026 |
| Linux | opencryptoki-icsftok almalinux 8 | 3.22.0-3.el8_10.2 | [ALSA-2026:5587](https://patchblox.com/security/data/fix/linux/alsa-2026-5587.md) | Mar 24, 2026 |
| Linux | opencryptoki-icsftok almalinux 9 | 3.25.0-4.el9_7.2 | [ALSA-2026:5603](https://patchblox.com/security/data/fix/linux/alsa-2026-5603.md) | Mar 24, 2026 |
| Linux | opencryptoki-icsftok ol 10 | 0:3.25.0-5.el10_1.2 | [ELSA-2026-4717](https://patchblox.com/security/data/fix/linux/elsa-2026-4717.md) | Mar 17, 2026 |
| Linux | opencryptoki-icsftok ol 8 | 0:3.22.0-3.el8_10.2 | [ELSA-2026-5587](https://patchblox.com/security/data/fix/linux/elsa-2026-5587.md) | Mar 24, 2026 |
| Linux | opencryptoki-icsftok ol 9 | 0:3.25.0-4.el9_7.2 | [ELSA-2026-5603](https://patchblox.com/security/data/fix/linux/elsa-2026-5603.md) | Mar 24, 2026 |
| Linux | opencryptoki-icsftok-debuginfo Fedora 43 | 3.26.0-3.fc43 | [FEDORA-2026-6C3B6EC624](https://patchblox.com/security/data/fix/linux/fedora-2026-6c3b6ec624.md) | May 5, 2026 |
| Linux | opencryptoki-libs Fedora 43 | 3.26.0-3.fc43 | [FEDORA-2026-6C3B6EC624](https://patchblox.com/security/data/fix/linux/fedora-2026-6c3b6ec624.md) | May 5, 2026 |
| Linux | opencryptoki-libs RHEL 8 | 0:3.22.0-3.el8_10.2 | [RHSA-2026:5587](https://patchblox.com/security/data/fix/linux/rhsa-2026-5587.md) | Apr 15, 2026 |
| Linux | opencryptoki-libs RHEL 9 | 0:3.25.0-4.el9_7.2 | [RHSA-2026:5603](https://patchblox.com/security/data/fix/linux/rhsa-2026-5603.md) | Apr 15, 2026 |
| Linux | opencryptoki-libs almalinux 8 | 3.22.0-3.el8_10.2 | [ALSA-2026:5587](https://patchblox.com/security/data/fix/linux/alsa-2026-5587.md) | Mar 24, 2026 |
| Linux | opencryptoki-libs almalinux 9 | 3.25.0-4.el9_7.2 | [ALSA-2026:5603](https://patchblox.com/security/data/fix/linux/alsa-2026-5603.md) | Mar 24, 2026 |
| Linux | opencryptoki-libs ol 10 | 0:3.25.0-5.el10_1.2 | [ELSA-2026-4717](https://patchblox.com/security/data/fix/linux/elsa-2026-4717.md) | Mar 17, 2026 |
| Linux | opencryptoki-libs ol 8 | 0:3.22.0-3.el8_10.2 | [ELSA-2026-5587](https://patchblox.com/security/data/fix/linux/elsa-2026-5587.md) | Mar 24, 2026 |
| Linux | opencryptoki-libs ol 9 | 0:3.25.0-4.el9_7.2 | [ELSA-2026-5603](https://patchblox.com/security/data/fix/linux/elsa-2026-5603.md) | Mar 24, 2026 |
| Linux | opencryptoki-libs-debuginfo Fedora 43 | 3.26.0-3.fc43 | [FEDORA-2026-6C3B6EC624](https://patchblox.com/security/data/fix/linux/fedora-2026-6c3b6ec624.md) | May 5, 2026 |
| Linux | opencryptoki-swtok Fedora 43 | 3.26.0-3.fc43 | [FEDORA-2026-6C3B6EC624](https://patchblox.com/security/data/fix/linux/fedora-2026-6c3b6ec624.md) | May 5, 2026 |
| Linux | opencryptoki-swtok RHEL 8 | 0:3.22.0-3.el8_10.2 | [RHSA-2026:5587](https://patchblox.com/security/data/fix/linux/rhsa-2026-5587.md) | Apr 15, 2026 |
| Linux | opencryptoki-swtok RHEL 9 | 0:3.25.0-4.el9_7.2 | [RHSA-2026:5603](https://patchblox.com/security/data/fix/linux/rhsa-2026-5603.md) | Apr 15, 2026 |
| Linux | opencryptoki-swtok almalinux 8 | 3.22.0-3.el8_10.2 | [ALSA-2026:5587](https://patchblox.com/security/data/fix/linux/alsa-2026-5587.md) | Mar 24, 2026 |
| Linux | opencryptoki-swtok almalinux 9 | 3.25.0-4.el9_7.2 | [ALSA-2026:5603](https://patchblox.com/security/data/fix/linux/alsa-2026-5603.md) | Mar 24, 2026 |
| Linux | opencryptoki-swtok ol 10 | 0:3.25.0-5.el10_1.2 | [ELSA-2026-4717](https://patchblox.com/security/data/fix/linux/elsa-2026-4717.md) | Mar 17, 2026 |
| Linux | opencryptoki-swtok ol 8 | 0:3.22.0-3.el8_10.2 | [ELSA-2026-5587](https://patchblox.com/security/data/fix/linux/elsa-2026-5587.md) | Mar 24, 2026 |
| Linux | opencryptoki-swtok ol 9 | 0:3.25.0-4.el9_7.2 | [ELSA-2026-5603](https://patchblox.com/security/data/fix/linux/elsa-2026-5603.md) | Mar 24, 2026 |
| Linux | opencryptoki-swtok-debuginfo Fedora 43 | 3.26.0-3.fc43 | [FEDORA-2026-6C3B6EC624](https://patchblox.com/security/data/fix/linux/fedora-2026-6c3b6ec624.md) | May 5, 2026 |
| Linux | opencryptoki-tpmtok RHEL 8 | 0:3.22.0-3.el8_10.2 | [RHSA-2026:5587](https://patchblox.com/security/data/fix/linux/rhsa-2026-5587.md) | Apr 15, 2026 |
| Linux | opencryptoki-tpmtok almalinux 8 | 3.22.0-3.el8_10.2 | [ALSA-2026:5587](https://patchblox.com/security/data/fix/linux/alsa-2026-5587.md) | Mar 24, 2026 |
| Linux | opencryptoki-tpmtok ol 8 | 0:3.22.0-3.el8_10.2 | [ELSA-2026-5587](https://patchblox.com/security/data/fix/linux/elsa-2026-5587.md) | Mar 24, 2026 |

---

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