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CVE-2026-10649 is an integer-overflow vulnerability in Pacemaker remote-message decompression, affecting the pre-authentication CIB remote-listener parsing path. In pcmk__remote_message_xml(), attacker-controlled remote-message header size fields can overflow during buffer-size calculations, resulting in an undersized allocation. Bzip2 decompression can then write beyond the allocated buffer, causing memory corruption and crashing the CIB remote listener.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An integer-overflow vulnerability in Pacemaker's remote-message decompression that can cause denial of service. Rocky Linux 10.2 systems with affected Pacemaker packages require the security update referenced by CIQ advisory crlsa-2026_40833.
A vulnerability affecting TencentOS Server 4 / pacemaker as referenced in a Tencent Local Security Checks plugin.
An integer overflow vulnerability in Pacemaker's remote message decompression process that can be exploited pre-authentication by a remote attacker to cause memory corruption and denial of service in the CIB remote listener.
An unauthenticated remote integer overflow vulnerability in Pacemaker's remote message decompression path that can cause memory corruption and denial of service in the CIB remote listener before authentication.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.