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

Critical severity · published May 6, 2026

CVE-2026-43125

dlm: validate length in dlm_search_rsb_tree

9.8

CVSS

0.5%

EPSS

On KEV

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.

CVSS vector

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

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.5% · higher than 45% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Kernel · Linux

3.4 before 6.12.75; 6.13 before 6.18.16; 6.19 before 6.19.6 · source: NVD

Linux · Linux

7210cb7a72a22303cdb225bd1aea28697a17bbae before 2deafd015ea9a0e75ee5764e20eb1e16bd73efd8; 7210cb7a72a22303cdb225bd1aea28697a17bbae before 67288113c5e6cf9e659b4065c0ed6f16100e0c71; 7210cb7a72a22303cdb225bd1aea28697a17bbae before 082083c9fbd99422a0370fe2102144a231c9f5d6; 7210cb7a72a22303cdb225bd1aea28697a17bbae before 5f053a2e7209d326cbbc07738fa6d6893d307438; 7210cb7a72a22303cdb225bd1aea28697a17bbae before 080e5563f878c64e697b89e7439d730d0daad882; 3.4 · source: vendor

Red Hat Enterprise Linux 6 · Red Hat