# CVE-2026-31958: pcs: The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities.  Security Fix(...

CVE-2026-31958 is fixed in 14 products on 1 platform, first by DEBIAN-CVE-2026-31958, released March 11, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-31958
- Priority: High
- CVSS: 7.5 (Moderate)
- EPSS: 0.0042
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 11, 2026

## Description

The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities.  Security Fix(es):  * tornado-python: Tornado: Denial of Service via large multipart bodies (CVE-2026-31958)  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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | pcs RHEL 8 | 0:0.10.18-2.el8_10.9 | [RHSA-2026:8093](https://patchblox.com/security/data/fix/linux/rhsa-2026-8093.md) | Apr 15, 2026 |
| Linux | pcs almalinux 8 | 0.10.18-2.el8_10.9.alma.1 | [ALSA-2026:8093](https://patchblox.com/security/data/fix/linux/alsa-2026-8093.md) | Apr 14, 2026 |
| Linux | pcs ol 8 | 0:0.10.18-2.0.1.el8_10.9 | [ELSA-2026-8093](https://patchblox.com/security/data/fix/linux/elsa-2026-8093.md) | Apr 15, 2026 |
| Linux | pcs rocky 8 | 0:0.10.18-2.el8_10.9 | [RLSA-2026:8093](https://patchblox.com/security/data/fix/linux/rlsa-2026-8093.md) | Apr 16, 2026 |
| Linux | pcs-snmp RHEL 8 | 0:0.10.18-2.el8_10.9 | [RHSA-2026:8093](https://patchblox.com/security/data/fix/linux/rhsa-2026-8093.md) | Apr 15, 2026 |
| Linux | pcs-snmp almalinux 8 | 0.10.18-2.el8_10.9.alma.1 | [ALSA-2026:8093](https://patchblox.com/security/data/fix/linux/alsa-2026-8093.md) | Apr 14, 2026 |
| Linux | pcs-snmp ol 8 | 0:0.10.18-2.0.1.el8_10.9 | [ELSA-2026-8093](https://patchblox.com/security/data/fix/linux/elsa-2026-8093.md) | Apr 15, 2026 |
| Linux | python-tornado Debian 14 | 6.5.5-1 | [DEBIAN-CVE-2026-31958](https://patchblox.com/security/data/fix/linux/debian-cve-2026-31958.md) | Mar 11, 2026 |
| Linux | python-tornado Fedora 43 | 6.5.7-1.fc43 | [FEDORA-2026-23656E6D2F](https://patchblox.com/security/data/fix/linux/fedora-2026-23656e6d2f.md) | Jul 3, 2026 |
| Linux | python-tornado RHEL 10 | 6.4.2-1.el10_0.2 | [RHSA-2026:20577](https://patchblox.com/security/data/fix/linux/rhsa-2026-20577.md) | Apr 3, 2026 |
| Linux | python-tornado Ubuntu 18.04.6 LTS (bionic) | 4.5.3-1ubuntu0.2+esm3 | [python-tornado 4.5.3-1ubuntu0.2+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-tornado-4.5.3-1ubuntu0.2-esm3.md) | Apr 30, 2026 |
| Linux | python-tornado rocky 10 | 0:6.5.5-1.el10_1.1 | [RLSA-2026:19034](https://patchblox.com/security/data/fix/linux/rlsa-2026-19034.md) | May 29, 2026 |
| Linux | python-tornado rocky 9 | 0:6.5.5-1.el9_7.1 | [RLSA-2026:19189](https://patchblox.com/security/data/fix/linux/rlsa-2026-19189.md) | May 21, 2026 |
| Linux | python-tornado sles 15.6 | 4.5.3-150000.3.19.1 | [SUSE-SU-2026:1171-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1171-1.md) | Apr 2, 2026 |
| Linux | python-tornado sles 15.7 | 4.5.3-150000.3.19.1 | [SUSE-SU-2026:1171-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1171-1.md) | Apr 2, 2026 |
| Linux | python-tornado-debugsource Fedora 43 | 6.5.7-1.fc43 | [FEDORA-2026-23656E6D2F](https://patchblox.com/security/data/fix/linux/fedora-2026-23656e6d2f.md) | Jul 3, 2026 |
| Linux | python-tornado-debugsource amzn 2023 | 6.1.0-2.amzn2023.0.7 | [ALAS2023-2026-1502](https://patchblox.com/security/data/fix/linux/alas2023-2026-1502.md) | Mar 30, 2026 |
| Linux | python-tornado-doc Fedora 43 | 6.5.7-1.fc43 | [FEDORA-2026-23656E6D2F](https://patchblox.com/security/data/fix/linux/fedora-2026-23656e6d2f.md) | Jul 3, 2026 |
| Linux | python-tornado-doc amzn 2023 | 6.1.0-2.amzn2023.0.7 | [ALAS2023-2026-1502](https://patchblox.com/security/data/fix/linux/alas2023-2026-1502.md) | Mar 30, 2026 |
| Linux | python-tornado6 opensuse-leap 15.6 | 6.3.2-150400.9.15.1 | [SUSE-SU-2026:1064-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1064-1.md) | Mar 26, 2026 |
| Linux | python-tornado6 opensuse-leap 16.0 | 6.5-160000.4.1 | [OPENSUSE-SU-2026:20406-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20406-1.md) | Mar 20, 2026 |
| Linux | python-tornado6 sles 15.6 | 6.3.2-150400.9.15.1 | [SUSE-SU-2026:1064-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1064-1.md) | Mar 26, 2026 |
| Linux | python-tornado6 sles 15.7 | 6.3.2-150400.9.15.1 | [SUSE-SU-2026:1064-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1064-1.md) | Mar 26, 2026 |
| Linux | python-tornado6 sles 16.0 | 6.5-160000.4.1 | [SUSE-SU-2026:20919-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20919-1.md) | Mar 20, 2026 |
| Linux | python3-tornado Fedora 43 | 6.5.7-1.fc43 | [FEDORA-2026-23656E6D2F](https://patchblox.com/security/data/fix/linux/fedora-2026-23656e6d2f.md) | Jul 3, 2026 |
| Linux | python3-tornado RHEL 9 | 0:6.5.5-1.el9_8 | [RHSA-2026:19189](https://patchblox.com/security/data/fix/linux/rhsa-2026-19189.md) | May 15, 2026 |
| Linux | python3-tornado Ubuntu 18.04.6 LTS (bionic) | 4.5.3-1ubuntu0.2+esm3 | [python3-tornado 4.5.3-1ubuntu0.2+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-tornado-4.5.3-1ubuntu0.2-esm3.md) | Apr 30, 2026 |
| Linux | python3-tornado Ubuntu 22.04.1 LTS (jammy) | 6.1.0-3ubuntu0.1~esm5 | [python3-tornado 6.1.0-3ubuntu0.1~esm5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-tornado-6.1.0-3ubuntu0.1-esm5.md) | Apr 30, 2026 |
| Linux | python3-tornado Ubuntu 24.04.5 LTS (noble) | 6.4.0-1ubuntu0.5 | [python3-tornado 6.4.0-1ubuntu0.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-tornado-6.4.0-1ubuntu0.5.md) | Apr 30, 2026 |
| Linux | python3-tornado Ubuntu 25.10 (questing) | 6.4.2-3ubuntu0.3 | [python3-tornado 6.4.2-3ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-python3-tornado-6.4.2-3ubuntu0.3.md) | Apr 30, 2026 |
| Linux | python3-tornado Ubuntu 26.04.1 LTS (resolute) | 6.5.4-0.1ubuntu0.1 | [python3-tornado 6.5.4-0.1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-tornado-6.5.4-0.1ubuntu0.1.md) | Apr 2, 2026 |
| Linux | python3-tornado almalinux 10 | 6.5.5-1.el10_2 | [ALSA-2026:19034](https://patchblox.com/security/data/fix/linux/alsa-2026-19034.md) | May 19, 2026 |
| Linux | python3-tornado almalinux 9 | 6.5.5-1.el9_8 | [ALSA-2026:19189](https://patchblox.com/security/data/fix/linux/alsa-2026-19189.md) | May 19, 2026 |
| Linux | python3-tornado amzn 2023 | 6.1.0-2.amzn2023.0.7 | [ALAS2023-2026-1502](https://patchblox.com/security/data/fix/linux/alas2023-2026-1502.md) | Mar 30, 2026 |
| Linux | python3-tornado ol 10 | 0:6.5.5-1.el10_1.1 | [ELSA-2026-13641](https://patchblox.com/security/data/fix/linux/elsa-2026-13641.md) | May 5, 2026 |
| Linux | python3-tornado ol 9 | 0:6.5.5-1.el9_7.1 | [ELSA-2026-13670](https://patchblox.com/security/data/fix/linux/elsa-2026-13670.md) | May 5, 2026 |
| Linux | python3-tornado-debuginfo Fedora 43 | 6.5.7-1.fc43 | [FEDORA-2026-23656E6D2F](https://patchblox.com/security/data/fix/linux/fedora-2026-23656e6d2f.md) | Jul 3, 2026 |
| Linux | python3-tornado-debuginfo amzn 2023 | 6.1.0-2.amzn2023.0.7 | [ALAS2023-2026-1502](https://patchblox.com/security/data/fix/linux/alas2023-2026-1502.md) | Mar 30, 2026 |
| Linux | python3.13-tornado amzn 2023 | 6.4.2-1.amzn2023.0.2 | [ALAS2023-2026-1528](https://patchblox.com/security/data/fix/linux/alas2023-2026-1528.md) | Mar 30, 2026 |
| Linux | python3.13-tornado-debuginfo amzn 2023 | 6.4.2-1.amzn2023.0.2 | [ALAS2023-2026-1528](https://patchblox.com/security/data/fix/linux/alas2023-2026-1528.md) | Mar 30, 2026 |
| Linux | python3.13-tornado-debugsource amzn 2023 | 6.4.2-1.amzn2023.0.2 | [ALAS2023-2026-1528](https://patchblox.com/security/data/fix/linux/alas2023-2026-1528.md) | Mar 30, 2026 |
| Linux | python3.13-tornado-doc amzn 2023 | 6.4.2-1.amzn2023.0.2 | [ALAS2023-2026-1528](https://patchblox.com/security/data/fix/linux/alas2023-2026-1528.md) | Mar 30, 2026 |
| Linux | salt opensuse-leap 16.0 | 3006.0-160000.5.1 | [OPENSUSE-SU-2026:20918-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20918-1.md) | Jun 8, 2026 |
| Linux | salt-test opensuse-leap 16.0 | 3006.0-160000.5.1 | [OPENSUSE-SU-2026:20918-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20918-1.md) | Jun 8, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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