CVE-2026-10649
Pacemaker: pacemaker: denial of service via integer overflow in remote message decompression
02 Description
Pacemaker: pacemaker: denial of service via integer overflow in remote message decompression
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.56% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 46.4% of scored records. A rank, not a probability.
- NVD base score
- 8.6 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
- NVD analysis status
- Awaiting Analysis. NVD last modified this record on 2026-08-21.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-06-16 15:57Z4 MO AGO
- Last updated
- 2026-08-21 12:12Z2 MO AGO
- Reserved
- 2026-06-02
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- High (CVSS 8.6)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
- Weaknesses
- CWE-190Integer Overflow or WraparoundBase
- Data version
- 5.2
- Document digest
- 21056a901c3fdac39f33607830cf41a47858b1d5dc85308d8dd96924089c890d
05 Affected products
06 References
- access.redhat.comRHSA-2026:39322https://access.redhat.com/errata/RHSA-2026:39322
- access.redhat.comRHSA-2026:39323https://access.redhat.com/errata/RHSA-2026:39323
- access.redhat.comRHSA-2026:40833https://access.redhat.com/errata/RHSA-2026:40833
- access.redhat.comRHSA-2026:41041https://access.redhat.com/errata/RHSA-2026:41041
- access.redhat.comRHSA-2026:41042https://access.redhat.com/errata/RHSA-2026:41042
- access.redhat.comRHSA-2026:41043https://access.redhat.com/errata/RHSA-2026:41043
- access.redhat.comRHSA-2026:41044https://access.redhat.com/errata/RHSA-2026:41044
- access.redhat.comRHSA-2026:42041https://access.redhat.com/errata/RHSA-2026:42041
- access.redhat.comRHSA-2026:42075https://access.redhat.com/errata/RHSA-2026:42075
- access.redhat.comRHSA-2026:42076https://access.redhat.com/errata/RHSA-2026:42076
- access.redhat.comRHSA-2026:43606https://access.redhat.com/errata/RHSA-2026:43606
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-10649
- bugzilla.redhat.comRHBZ#2462817https://bugzilla.redhat.com/show_bug.cgi?id=2462817
- github.comhttps://github.com/clusterLabs/pacemaker/pull/4128
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/06/16/6
- security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-10649.json
07 Fixed in
AlmaLinux 8
- pacemaker Fixed in 2.1.7-5.6.el8_10
- pacemaker-cli Fixed in 2.1.7-5.6.el8_10
- pacemaker-cluster-libs Fixed in 2.1.7-5.6.el8_10
- pacemaker-cts Fixed in 2.1.7-5.6.el8_10
- pacemaker-doc Fixed in 2.1.7-5.6.el8_10
- pacemaker-libs Fixed in 2.1.7-5.6.el8_10
- pacemaker-libs-devel Fixed in 2.1.7-5.6.el8_10
- pacemaker-nagios-plugins-metadata Fixed in 2.1.7-5.6.el8_10
- pacemaker-remote Fixed in 2.1.7-5.6.el8_10
- pacemaker-schemas Fixed in 2.1.7-5.6.el8_10
- python3-pacemaker Fixed in 2.1.7-5.6.el8_10
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- pacemaker Fixed in 2.1.10-3.el9_8
- pacemaker-cli Fixed in 2.1.10-3.el9_8
- pacemaker-cluster-libs Fixed in 2.1.10-3.el9_8
- pacemaker-cts Fixed in 2.1.10-3.el9_8
- pacemaker-doc Fixed in 2.1.10-3.el9_8
- pacemaker-libs Fixed in 2.1.10-3.el9_8
- pacemaker-libs-devel Fixed in 2.1.10-3.el9_8
- pacemaker-nagios-plugins-metadata Fixed in 2.1.10-3.el9_8
- pacemaker-remote Fixed in 2.1.10-3.el9_8
- pacemaker-schemas Fixed in 2.1.10-3.el9_8
- python3-pacemaker Fixed in 2.1.10-3.el9_8
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 10
- pacemaker Fixed in 3.0.1-5.el10_2.1
- pacemaker-cli Fixed in 3.0.1-5.el10_2.1
- pacemaker-cluster-libs Fixed in 3.0.1-5.el10_2.1
- pacemaker-cts Fixed in 3.0.1-5.el10_2.1
- pacemaker-doc Fixed in 3.0.1-5.el10_2.1
- pacemaker-libs Fixed in 3.0.1-5.el10_2.1
- pacemaker-libs-devel Fixed in 3.0.1-5.el10_2.1
- pacemaker-remote Fixed in 3.0.1-5.el10_2.1
- pacemaker-schemas Fixed in 3.0.1-5.el10_2.1
- python3-pacemaker Fixed in 3.0.1-5.el10_2.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- pacemaker Fixed in 2.1.7-5.6.el8_10
- pacemaker-cli Fixed in 2.1.7-5.6.el8_10
- pacemaker-cluster-libs Fixed in 2.1.7-5.6.el8_10
- pacemaker-cts Fixed in 2.1.7-5.6.el8_10
- pacemaker-doc Fixed in 2.1.7-5.6.el8_10
- pacemaker-libs Fixed in 2.1.7-5.6.el8_10
- pacemaker-libs-devel Fixed in 2.1.7-5.6.el8_10
- pacemaker-nagios-plugins-metadata Fixed in 2.1.7-5.6.el8_10
- pacemaker-remote Fixed in 2.1.7-5.6.el8_10
- pacemaker-schemas Fixed in 2.1.7-5.6.el8_10
- python3-pacemaker Fixed in 2.1.7-5.6.el8_10
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- pacemaker Fixed in 2.1.10-3.el9_8
- pacemaker-cli Fixed in 2.1.10-3.el9_8
- pacemaker-cluster-libs Fixed in 2.1.10-3.el9_8
- pacemaker-cts Fixed in 2.1.10-3.el9_8
- pacemaker-doc Fixed in 2.1.10-3.el9_8
- pacemaker-libs Fixed in 2.1.10-3.el9_8
- pacemaker-libs-devel Fixed in 2.1.10-3.el9_8
- pacemaker-nagios-plugins-metadata Fixed in 2.1.10-3.el9_8
- pacemaker-remote Fixed in 2.1.10-3.el9_8
- pacemaker-schemas Fixed in 2.1.10-3.el9_8
- python3-pacemaker Fixed in 2.1.10-3.el9_8
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 10
- pacemaker Fixed in 3.0.1-5.el10_2.1
- pacemaker-cli Fixed in 3.0.1-5.el10_2.1
- pacemaker-cluster-libs Fixed in 3.0.1-5.el10_2.1
- pacemaker-cts Fixed in 3.0.1-5.el10_2.1
- pacemaker-doc Fixed in 3.0.1-5.el10_2.1
- pacemaker-libs Fixed in 3.0.1-5.el10_2.1
- pacemaker-libs-devel Fixed in 3.0.1-5.el10_2.1
- pacemaker-remote Fixed in 3.0.1-5.el10_2.1
- pacemaker-schemas Fixed in 3.0.1-5.el10_2.1
- python3-pacemaker Fixed in 3.0.1-5.el10_2.1
Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- pacemaker No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- pacemaker No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- pacemaker No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- pacemaker No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- pacemaker No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- pacemaker No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- pacemaker No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- pacemaker No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- pacemaker No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- pacemaker No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- pacemaker No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.