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CVE-2026-43125: dlm: validate length in dlm_search_rsb_tree

highCVSS 7.8CVE-2026-43125

CSIRTS triage

vendor: Linuxproduct: Linux KernelDenial of service
What
The dlm subsystem does not properly validate length in dlm_search_rsb_tree, potentially allowing buffer overflow or denial of service.
Who is affected
Linux clusters using the Distributed Lock Manager (DLM) in affected kernel versions.
Urgency
High severity (CVSS 7.8) but not yet exploited; prompt patching is warranted.
Action
Apply kernel patches addressing CVE-2026-43125 as soon as available.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7.8
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43125

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-43125coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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