CVE-2026-10649: Red Hat Enterprise Linux 10 · Integer Overflow or Wraparound
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 8.6 High.
Data as of 30 Oct 2026, 20:25 UTC
- EPSS
- 0.5% chance of exploitation in 30 days – higher than 46% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:HExploitation evidence
Disclosed: evidence found.
CVE published 16 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10pacemaker | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10.0 Extended Update Supportpacemaker | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7 Extended Lifecycle Supportpacemaker | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8pacemaker | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportpacemaker | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onpacemaker | Affected– | Fixed in– |
AI-suggested
Red Hat has released official security updates for Red Hat Enterprise Linux 8 and 9 that fix this vulnerability. Users should apply the updated pacemaker packages as detailed in Red Hat advisories RHSA-2026:39322 and RHSA-2026:39323. Refer to https://access.redhat.com/articles/11258 for update instructions. No additional mitigations are required once the update is applied.
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.
References
- access.redhat.com/errata/RHSA-2026:39322 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:39323 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:40833 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:41041 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:41042 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:41043 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:41044 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:42041 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:42075 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:42076 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:43606 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-10649 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2462817 (opens in a new tab)
- github.com/clusterLabs/pacemaker/pull/4128 (opens in a new tab)
- openwall.com/lists/oss-security/2026/06/16/6 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-10649.json (opens in a new tab)