Red Hat Security Advisory: p11-kit security update
Affects Red Hat p11-kitSource GCVE Database
Not known to be exploited · CVSS 5.3 Medium : upgrade Red Hat p11-kit to 0.26.2 when convenient.
Data as of 5 Nov 2026, 22:49 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 5.3 |
|---|
- Patch
- Available – fixed in 0.26.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LExploitation evidence
Disclosed: evidence found.
CVE published 26 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Upgrade p11-kit to 0.26.2.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| p11-gluep11-kit | Affected
| Fixed in
|
GitHubp11-kitpkg:github/p11-kitOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
The p11-kit packages provide a mechanism to manage PKCS#11 modules. The p11-kit-trust subpackage includes a PKCS#11 trust module that provides certificate anchors and black lists based on configuration files. Security Fix(es): * p11-kit: p11-kit: NULL dereference via C_DeriveKey with specific NULL parameters (CVE-2026-2100) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 9 Release Notes linked from the References section.
References
- access.redhat.com/errata/RHSA-2026:18599 (opens in a new tab)
- docs.redhat.com/en/documentation/red_hat_enterprise_linux/9/html/9.8_release_notes/index (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2437308 (opens in a new tab)
- issues.redhat.com/browse/RHEL-91952 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_18599.json (opens in a new tab)