dlm: validate length in dlm_search_rsb_tree_CVE-2026-43125

9.8 / 10

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

AI Analysis

Potential buffer overflow vulnerability in the Linux kernel due to lack of length validation in dlm_search_rsb_tree()

Basic Information

ID CVE-2026-43125

Source Linux

Published May 6, 2026 at 11:27

Modified May 8, 2026 at 12:40

Affected Product

Vendor Linux

Product Linux

Version 7210cb7a72a22303cdb225bd1aea28697a17bbae

Affected Versions Linux Linux 7210cb7a72a22303cdb225bd1aea28697a17bbae
Linux Linux 7210cb7a72a22303cdb225bd1aea28697a17bbae
Linux Linux 7210cb7a72a22303cdb225bd1aea28697a17bbae
Linux Linux 7210cb7a72a22303cdb225bd1aea28697a17bbae
Linux Linux 3.4

AI Assessment

AI Score 9.8 / 10

AI Severity Critical

Vendor Linux

Product Linux Kernel

Version 7210cb7a72a22303cdb225bd1aea28697a17bbae, 3.4

References

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    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\ndlm: validate length in dlm_search_rsb_tree\n\nThe len parameter in dlm_dump_rsb_name() is not validated and comes\nfrom network messages. When it exceeds DLM_RESNAME_MAXLEN, it can\ncause out-of-bounds write in dlm_search_rsb_tree().\n\nAdd length validation to prevent potential buffer overflow.",
    "published": "2026-05-06T11:27:10.903Z",
    "modified": "2026-05-08T12:40:44.270Z",
    "type": "cve",
    "title": "dlm: validate length in dlm_search_rsb_tree",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/67288113c5e6cf9e659b4065c0ed6f16100e0c71\nhttps://git.kernel.org/stable/c/082083c9fbd99422a0370fe2102144a231c9f5d6\nhttps://git.kernel.org/stable/c/5f053a2e7209d326cbbc07738fa6d6893d307438\nhttps://git.kernel.org/stable/c/080e5563f878c64e697b89e7439d730d0daad882",
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