What’s Vulnerable › Vulnerabilities
CVE-2026-43125: dlm: validate length in dlm_search_rsb_tree
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-06 · updated 2026-10-30
- Weakness: CWE-787
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.
Affected products
- Linux kernel: from 3.4 before 6.12.75; from 6.13 before 6.18.16; from 6.19 before 6.19.6 — fixed in 6.12.75, 6.18.16, 6.19.6
- Linux: 3.4 — fixed in 7.0
How to fix
Upgrade to a fixed version: Linux kernel 6.12.75, 6.18.16, 6.19.6; Linux 7.0. Check the vendor advisory for mitigations.
References
- https://git.kernel.org/stable/c/0270664871616eb3a5c864b9aa17be76fd35b920
- https://git.kernel.org/stable/c/080e5563f878c64e697b89e7439d730d0daad882
- https://git.kernel.org/stable/c/082083c9fbd99422a0370fe2102144a231c9f5d6
- https://git.kernel.org/stable/c/2deafd015ea9a0e75ee5764e20eb1e16bd73efd8
- https://git.kernel.org/stable/c/5f053a2e7209d326cbbc07738fa6d6893d307438
- https://git.kernel.org/stable/c/67288113c5e6cf9e659b4065c0ed6f16100e0c71
- https://git.kernel.org/stable/c/c98d071a1ca903b705316225e47006aaa20e989c
- https://access.redhat.com/errata/RHSA-2026:25120
- https://access.redhat.com/errata/RHSA-2026:25121
- https://access.redhat.com/errata/RHSA-2026:25217
- https://access.redhat.com/errata/RHSA-2026:33899
- https://access.redhat.com/errata/RHSA-2026:33900
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