Integer overflow in Red Hat Enterprise Linux 10
CVE-2026-10649
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.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.
EPSS exploit prediction
EPSS: 0.006 (44.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Red Hat Enterprise Linux 10 — versions 0:3.0.1-5.el10_2.1
- Red Hat Enterprise Linux 10.0 Extended Update Support — versions 0:3.0.0-5.3.el10_0
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 7 Extended Lifecycle Support — versions 0:1.1.23-1.el7_9.2
- Red Hat Enterprise Linux 8 — versions 0:2.1.7-5.6.el8_10
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support — versions 0:2.0.5-9.el8_4.12
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On — versions 0:2.0.5-9.el8_4.12
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support — versions 0:2.1.2-4.el8_6.11
- Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On — versions 0:2.1.2-4.el8_6.11
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-10649 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- github.com/clusterLabs/pacemaker/pull/4128
- af854a3a-2127-422b-91ae-364da2661108
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- access.redhat.com/errata/RHSA-2026:39322 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:39323 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:40833 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:41044 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:41043 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-10649?
- CVE-2026-10649 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Integer Overflow or Wraparound. CVSS score: 8.6/10. Published 2026-06-16.
- How severe is CVE-2026-10649?
- High severity. CVSS v3 base score is 8.6 out of 10.