Description
An issue was discovered in p11-kit 0.23.6 through 0.23.21. A heap-based buffer overflow has been discovered in the RPC protocol used by p11-kit server/remote commands and the client library. When the remote entity supplies a serialized byte array in a CK_ATTRIBUTE, the receiving entity may not allocate sufficient length for the buffer to store the deserialized value.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | p11-kit | 0.23.22-1 | — |
| Debian 13 | p11-kit | 0.23.22-1 | — |
| Debian 12 | p11-kit | 0.23.22-1 | — |
| Debian 10 | p11-kit | 0.23.15-2+deb10u1 | DSA-4822-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | p11-kit | 0.23.20-1ubuntu0.1 | USN-4677-1 |
| Ubuntu 18.04 LTS | p11-kit | 0.23.9-2ubuntu0.1 | USN-4677-1 |
| Ubuntu 16.04 LTS | p11-kit | 0.23.2-5~ubuntu16.04.2 | USN-4677-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | p11-kit +3 | 0.23.22-1.el8 | RHSA-2021:1609 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | p11-kit +3 | 0.23.22-1.el8 | ALSA-2021:1609 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | p11-kit | 0.23.22-1.el8 | RLSA-2021:1609 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | p11-kit | 0.23.22-r0 | — |
| Alpine v3.23 | p11-kit | 0.23.22-r0 | — |
| Alpine v3.22 | p11-kit | 0.23.22-r0 | — |
| Alpine v3.21 | p11-kit | 0.23.22-r0 | — |
| Alpine v3.20 | p11-kit | 0.23.22-r0 | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | p11-kit | 0.23.22-r0 | — |
| Alpine v3.18 | p11-kit | 0.23.22-r0 | — |
| Alpine v3.17 | p11-kit | 0.23.22-r0 | — |
| Alpine v3.16 | p11-kit | 0.23.22-r0 | — |
| Alpine v3.15 | p11-kit | 0.23.22-r0 | — |
| Alpine v3.14 | p11-kit | 0.23.22-r0 | — |
| Alpine v3.13 | p11-kit | 0.23.22-r0 | — |
| Alpine v3.12 | p11-kit | 0.23.22-r0 | — |
| Alpine v3.11 | p11-kit | 0.23.18.1-r1 | — |
| Alpine v3.10 | p11-kit | 0.23.16.1-r1 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | p11-kit +3 | 0.23.22-1.amzn2.0.1 | ALAS2-2021-1601 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | p11-kit +3 | 0.23.22-1.el8 | ELSA-2021-1609 |
Advisories 10
- ALSA-2021:1609 Moderate: p11-kit security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2021:1609 Red Hat Security Advisory: p11-kit security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- WID-SEC-2025-0227 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 11, 2026
- USN-4677-1 p11-kit vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4822-1 p11-kit - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2021:1609 Moderate: p11-kit security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 4, 2026
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- ELSA-2021-1609 Moderate: p11-kit security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 25, 2021
- ALAS2-2021-1601 Moderate: p11-kit security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 19, 2021