CVE-2026-10649 Pacemaker: pacemaker: denial of service via integer overflow in remote message decompression
High 8.6
Published
Updated
Check this codebase for CVE-2026-10649 and fix it if it is affected.
What it is: CVE-2026-10649 is a high-severity vulnerability in Red Hat Enterprise Linux 10, published on 16 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-10649 in the wild and no public exploit code.
Affected product: Red Hat Enterprise Linux 10. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-10649/ (Markdown: https://insights.sbomify.com/CVE-2026-10649/index.md)
An unauthenticated remote attacker can cause a denial of service in Pacemaker's CIB remote listener by exploiting an integer overflow in message decompression.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-10649?
CVE-2026-10649 is a high-severity vulnerability in Red Hat Enterprise Linux 10, published on 16 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in Pacemaker. An unauthenticated remote attacker can exploit an integer overflow vulnerability in the remote message decompression process. By sending a specially crafted compressed remote message before authentication, an attacker can cause memory corruption, leading to a denial of service (DoS) in the CIB remote listener. This can result in the affected service crashing.
Weakness: CWE-190
Which versions are affected by CVE-2026-10649?
Linux distribution packages (40)
pacemaker AlmaLinux:10 | All versions | 3.0.1-5.el10_2.1 |
pacemaker-cli AlmaLinux:10 | All versions | 3.0.1-5.el10_2.1 |
pacemaker-cluster-libs AlmaLinux:10 | All versions | 3.0.1-5.el10_2.1 |
pacemaker-cts AlmaLinux:10 | All versions | 3.0.1-5.el10_2.1 |
pacemaker-doc AlmaLinux:10 | All versions | 3.0.1-5.el10_2.1 |
pacemaker-libs AlmaLinux:10 | All versions | 3.0.1-5.el10_2.1 |
pacemaker-libs-devel AlmaLinux:10 | All versions | 3.0.1-5.el10_2.1 |
pacemaker-remote AlmaLinux:10 | All versions | 3.0.1-5.el10_2.1 |
pacemaker-schemas AlmaLinux:10 | All versions | 3.0.1-5.el10_2.1 |
python3-pacemaker AlmaLinux:10 | All versions | 3.0.1-5.el10_2.1 |
pacemaker AlmaLinux:8 | All versions | 2.1.7-5.6.el8_10 |
pacemaker-cli AlmaLinux:8 | All versions | 2.1.7-5.6.el8_10 |
pacemaker-cluster-libs AlmaLinux:8 | All versions | 2.1.7-5.6.el8_10 |
pacemaker-cts AlmaLinux:8 | All versions | 2.1.7-5.6.el8_10 |
pacemaker-doc AlmaLinux:8 | All versions | 2.1.7-5.6.el8_10 |
pacemaker-libs AlmaLinux:8 | All versions | 2.1.7-5.6.el8_10 |
pacemaker-libs-devel AlmaLinux:8 | All versions | 2.1.7-5.6.el8_10 |
pacemaker-nagios-plugins-metadata AlmaLinux:8 | All versions | 2.1.7-5.6.el8_10 |
pacemaker-remote AlmaLinux:8 | All versions | 2.1.7-5.6.el8_10 |
pacemaker-schemas AlmaLinux:8 | All versions | 2.1.7-5.6.el8_10 |
python3-pacemaker AlmaLinux:8 | All versions | 2.1.7-5.6.el8_10 |
pacemaker AlmaLinux:9 | All versions | 2.1.10-3.el9_8 |
pacemaker-cli AlmaLinux:9 | All versions | 2.1.10-3.el9_8 |
pacemaker-cluster-libs AlmaLinux:9 | All versions | 2.1.10-3.el9_8 |
pacemaker-cts AlmaLinux:9 | All versions | 2.1.10-3.el9_8 |
pacemaker-doc AlmaLinux:9 | All versions | 2.1.10-3.el9_8 |
pacemaker-libs AlmaLinux:9 | All versions | 2.1.10-3.el9_8 |
pacemaker-libs-devel AlmaLinux:9 | All versions | 2.1.10-3.el9_8 |
pacemaker-nagios-plugins-metadata AlmaLinux:9 | All versions | 2.1.10-3.el9_8 |
pacemaker-remote AlmaLinux:9 | All versions | 2.1.10-3.el9_8 |
pacemaker-schemas AlmaLinux:9 | All versions | 2.1.10-3.el9_8 |
python3-pacemaker AlmaLinux:9 | All versions | 2.1.10-3.el9_8 |
pacemaker Red Hat:enterprise_linux:10.2 | All versions | 0:3.0.1-5.el10_2.1 |
pacemaker-cli Red Hat:enterprise_linux:10.2 | All versions | 0:3.0.1-5.el10_2.1 |
pacemaker-cli-debuginfo Red Hat:enterprise_linux:10.2 | All versions | 0:3.0.1-5.el10_2.1 |
pacemaker-cluster-libs Red Hat:enterprise_linux:10.2 | All versions | 0:3.0.1-5.el10_2.1 |
pacemaker-cluster-libs-debuginfo Red Hat:enterprise_linux:10.2 | All versions | 0:3.0.1-5.el10_2.1 |
pacemaker-cts Red Hat:enterprise_linux:10.2 | All versions | 0:3.0.1-5.el10_2.1 |
pacemaker-debuginfo Red Hat:enterprise_linux:10.2 | All versions | 0:3.0.1-5.el10_2.1 |
pacemaker-debugsource Red Hat:enterprise_linux:10.2 | All versions | 0:3.0.1-5.el10_2.1 |
How do I fix CVE-2026-10649?
Apply the vendor's patch.
Is CVE-2026-10649 being exploited?
There is no known exploitation of CVE-2026-10649 in the wild and no public exploit code.
Sources
Also known as ALSA-2026:39322, ALSA-2026:39323, ALSA-2026:40833, AZL-90180, CLSA-2026-1792159914, CLSA-2026-1792442836 and 35 more.