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CVE-2026-43125

39
FAUCET Score

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.

First published: May 6, 2026Last modified: May 11, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.4, < 6.12.75CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.13, < 6.18.16CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.19, < 6.19.6CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.43%
Probability of exploitation in next 30 days
EPSS Percentile
34.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0043 is in the 12th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (13)

ubuntupatch availablevia ubuntu_usn
Product: linux-azure-fde-6.17 (noble)Fixed in: 6.17.0-1018.18~24.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-azure-6.17 (noble)Fixed in: 6.17.0-1021.21~24.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-realtime-6.17 (noble)Fixed in: 6.17.0-1017.19~24.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-realtime (questing)Fixed in: 6.17.0-1017.19
ubuntupatch availablevia ubuntu_usn
Product: linux-aws-6.17 (noble)Fixed in: 6.17.0-1019.19~24.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-gcp-6.17 (noble)Fixed in: 6.17.0-1020.22~24.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-oracle-6.17 (noble)Fixed in: 6.17.0-1018.18~24.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux (questing)Fixed in: 6.17.0-40.40
ubuntupatch availablevia ubuntu_usn
Product: linux-aws (questing)Fixed in: 6.17.0-1019.19
ubuntupatch availablevia ubuntu_usn
Product: linux-gcp (questing)Fixed in: 6.17.0-1020.22
ubuntupatch availablevia ubuntu_usn
Product: linux-oracle (questing)Fixed in: 6.17.0-1018.18
ubuntupatch availablevia ubuntu_usn
Product: linux-oem-6.17 (noble)Fixed in: 6.17.0-1028.28
ubuntupatch availablevia ubuntu_usn
Product: linux-hwe-6.17 (noble)Fixed in: 6.17.0-40.40~24.04.1

Vendor Advisories (7)

ubuntuUSN-8605-1

Linux kernel (Azure CVM) vulnerabilities

Jul 24, 2026
ubuntuUSN-8604-1

Linux kernel (Azure) vulnerabilities

Jul 24, 2026
ubuntuUSN-8490-2

Linux kernel (Real-time) vulnerabilities

Jul 17, 2026
ubuntuUSN-8545-1

Linux kernel (HWE) vulnerabilities

Jul 15, 2026
ubuntuUSN-8491-1

Linux kernel (OEM) vulnerabilities

Jul 1, 2026
ubuntuUSN-8490-1

Linux kernel vulnerabilities

Jul 1, 2026
microsoft2026-May/CVE-2026-43125Important

dlm: validate length in dlm_search_rsb_tree

May 2, 2026

References

access.redhat.com / errata/RHSA-2026:25120
access.redhat.com / errata/RHSA-2026:25121
access.redhat.com / errata/RHSA-2026:25217
access.redhat.com / errata/RHSA-2026:33899
access.redhat.com / errata/RHSA-2026:33900
access.redhat.com / errata/RHSA-2026:34094
access.redhat.com / errata/RHSA-2026:34095
access.redhat.com / errata/RHSA-2026:35844
access.redhat.com / errata/RHSA-2026:35863
access.redhat.com / errata/RHSA-2026:36767
access.redhat.com / errata/RHSA-2026:41236
access.redhat.com / security/cve/CVE-2026-43125
bugzilla.redhat.com / show_bug.cgi
security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-43125.json
git.kernel.org / stable/c/080e5563f878c64e697b89e7439d730d0daad882
Patch
git.kernel.org / stable/c/082083c9fbd99422a0370fe2102144a231c9f5d6
Patch
git.kernel.org / stable/c/5f053a2e7209d326cbbc07738fa6d6893d307438
Patch
git.kernel.org / stable/c/67288113c5e6cf9e659b4065c0ed6f16100e0c71
Patch