CVE-2026-43125
Analyzed Analyzed - Analysis Complete
Buffer Overflow in Linux Kernel DLM Subsystem

Publication date: 2026-05-06

Last updated on: 2026-05-08

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: dlm: validate length in dlm_search_rsb_tree The len parameter in dlm_dump_rsb_name() is not validated and comes from network messages. When it exceeds DLM_RESNAME_MAXLEN, it can cause out-of-bounds write in dlm_search_rsb_tree(). Add length validation to prevent potential buffer overflow.
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Meta Information
Published
2026-05-06
Last Modified
2026-05-08
Generated
2026-06-16
AI Q&A
2026-05-06
EPSS Evaluated
2026-06-14
NVD
CVE-2026-43125
EUVD
EUVD-2026-27688
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 6.13 (inc) to 6.18.16 (exc)
linux linux_kernel From 6.19 (inc) to 6.19.6 (exc)
linux linux_kernel From 3.4 (inc) to 6.12.75 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.
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Executive Summary

This vulnerability exists in the Linux kernel's distributed lock manager (dlm) component. Specifically, the len parameter in the function dlm_dump_rsb_name() is not properly validated. This parameter originates from network messages, and if its value exceeds the maximum allowed length (DLM_RESNAME_MAXLEN), it can lead to an out-of-bounds write in the function dlm_search_rsb_tree().

The issue is addressed by adding length validation to prevent a potential buffer overflow.

Impact Analysis

If exploited, this vulnerability could cause an out-of-bounds write in the Linux kernel's dlm component. This may lead to memory corruption, which can result in system instability, crashes, or potentially allow an attacker to execute arbitrary code with kernel privileges.

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