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CVE-2026-43125 is a Linux kernel Distributed Lock Manager (DLM) vulnerability caused by insufficient validation of a length value derived from network messages. Specifically, the len parameter used by dlm_dump_rsb_name() is not validated before being used in dlm_search_rsb_tree(). If len exceeds DLM_RESNAME_MAXLEN, the code can perform an out-of-bounds write, resulting in a potential buffer overflow in kernel memory. The issue is resolved by adding length validation to ensure oversized resource-name lengths are rejected before reaching the vulnerable write path.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
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.
7 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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.