Description
An issue was discovered in p11-kit 0.21.1 through 0.23.21. A heap-based buffer over-read has been discovered in the RPC protocol used by thep11-kit server/remote commands and the client library. When the remote entity supplies a byte array through a serialized PKCS#11 function call, the receiving entity may allow the reading of up to 4 bytes of memory past the heap allocation.
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 |
| Debian 9 | p11-kit | 0.23.3-2+deb9u1 | DLA-2513-1 |
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 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | p11-kit | 0.23.2-150000.4.16.1 | SUSE-SU-2022:2405-1 |
| SLES 12 SP5 | p11-kit | 0.23.2-8.10.1 | SUSE-SU-2022:2871-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | p11-kit | 0.23.2-8.10.1 | SUSE-SU-2022:2871-1 |
| SLE Micro 5.2 | p11-kit | 0.23.2-150000.4.16.1 | SUSE-SU-2022:2405-1 |
| SLE Micro 5.1 | p11-kit | 0.23.2-150000.4.16.1 | SUSE-SU-2022:2405-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.3 | p11-kit | 0.23.2-150000.4.16.1 | SUSE-SU-2022:2405-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.2 | p11-kit | 0.23.2-150000.4.16.1 | SUSE-SU-2022:2405-2 |
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 14
- 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
- DLA-2513-1 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
- SUSE-SU-2022:2405-2 Security update for p11-kit SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2405-1 Security update for p11-kit SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2871-1 Security update for p11-kit SUSE / openSUSE Security Updates · 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