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CVE-2026-10649— Pacemaker: pacemaker: denial of service via integer overflow in remote message decompression

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ClusterLabs Pacemaker是ClusterLabs组织开源的一款可扩展的高可用性集群资源管理器。 ClusterLabs Pacemaker存在安全漏洞，该漏洞源于远程消息解压缩过程中的整数溢出，可能导致未经身份验证的远程攻击者通过发送特制的压缩远程消息，造成内存损坏，导致CIB远程监听器拒绝服务。

CVSS 8.6 · High EPSS 0.56% · P45

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 16

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 0:3.0.1-5.el10_2.1< * unaffected
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:3.0.0-5.3.el10_0< * unaffected
Red Hat Red Hat Enterprise Linux 6 any unaffected
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:1.1.23-1.el7_9.2< * unaffected
Red Hat Red Hat Enterprise Linux 8 0:2.1.7-5.6.el8_10< * unaffected
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.0.5-9.el8_4.12< * unaffected
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:2.0.5-9.el8_4.12< * unaffected
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.1.2-4.el8_6.11< * unaffected
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:2.1.2-4.el8_6.11< * unaffected
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:2.1.5-9.7.el8_8< * unaffected
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:2.1.5-9.7.el8_8< * unaffected
Red Hat Red Hat Enterprise Linux 9 0:2.1.10-3.el9_8< * unaffected
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:2.1.5-9.el9_2.7< * unaffected
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:2.1.7-5.5.el9_4< * unaffected
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:2.1.9-1.4.el9_6< * unaffected
Red Hat Red Hat OpenShift Container Platform 4 any unaffected
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I. Basic Information for CVE-2026-10649

Vulnerability Information
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Vulnerability Title
Pacemaker: pacemaker: denial of service via integer overflow in remote message decompression
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
ClusterLabs Pacemaker 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ClusterLabs Pacemaker是ClusterLabs组织开源的一款可扩展的高可用性集群资源管理器。 ClusterLabs Pacemaker存在安全漏洞，该漏洞源于远程消息解压缩过程中的整数溢出，可能导致未经身份验证的远程攻击者通过发送特制的压缩远程消息，造成内存损坏，导致CIB远程监听器拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 0:3.0.1-5.el10_2.1 ~ * cpe:/o:redhat:enterprise_linux:10.2
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:3.0.0-5.3.el10_0 ~ * cpe:/o:redhat:enterprise_linux_eus:10.0
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:1.1.23-1.el7_9.2 ~ * cpe:/o:redhat:enterprise_linux:7::server
Red Hat Red Hat Enterprise Linux 8 0:2.1.7-5.6.el8_10 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.0.5-9.el8_4.12 ~ * cpe:/a:redhat:rhel_aus:8.4::appstream
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:2.0.5-9.el8_4.12 ~ * cpe:/a:redhat:rhel_aus:8.4::appstream
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.1.2-4.el8_6.11 ~ * cpe:/a:redhat:rhel_aus:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:2.1.2-4.el8_6.11 ~ * cpe:/a:redhat:rhel_aus:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:2.1.5-9.7.el8_8 ~ * cpe:/a:redhat:rhel_e4s:8.8::appstream
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:2.1.5-9.7.el8_8 ~ * cpe:/a:redhat:rhel_e4s:8.8::appstream
Red Hat Red Hat Enterprise Linux 9 0:2.1.10-3.el9_8 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:2.1.5-9.el9_2.7 ~ * cpe:/a:redhat:rhel_e4s:9.2::highavailability
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:2.1.7-5.5.el9_4 ~ * cpe:/a:redhat:rhel_e4s:9.4::highavailability
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:2.1.9-1.4.el9_6 ~ * cpe:/a:redhat:rhel_eus:9.6::appstream
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-10649

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 13691 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-10649

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Patches & Fixes for CVE-2026-10649 (1)

Vendor Advisories for CVE-2026-10649 (12)

Same Patch Batch · Red Hat · 2026-06-16 · 7 CVEs total

CVE-2026-12398 7.5 HIGH Galaxy_ng: shell injection in legacy role import via unsanitized git ref names
CVE-2026-1767 5.6 MEDIUM Localsearch: tracker-miners: gnome localsearch mp3 extractor: heap buffer overflow leading
CVE-2026-1766 5.6 MEDIUM Localsearch: tracker-miners: gnome localsearch mp3 extractor: denial of service and inform
CVE-2026-1765 5.6 MEDIUM Localsearch: tracker-miners: gnome localsearch mp3 extractor: denial of service and potent
CVE-2026-1764 5.6 MEDIUM Localsearch: tracker-miners: gnome localsearch mp3 extractor: heap buffer overflow leads t
CVE-2026-4367 5.5 MEDIUM Libxpm: libxpm: denial of service via out-of-bounds read in xpm file parsing

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-190

V. Comments for CVE-2026-10649

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