CVE-2026-43125
Critical · CVSS 9.8Linux Kernel DLM (Distributed Lock Manager) — Out-of-bounds write / Buffer overflow via unvalidated network-supplied length parameter
- CVSS
- 9.8
- nvd
- EPSS
- 0.43%
- 35th pct
- KEV
- No
- Class
- oss containerizable
- CWE-787, CWE-130
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.
Search profile — drives PoC discovery
Symbols dlm_search_rsb_treedlm_dump_rsb_namedlm_dump_rsbDLM_RESNAME_MAXLENlenrsb_treedlm_rsb
Keywords CVE-2026-43125dlm_search_rsb_treedlm_dump_rsb_nameDLM_RESNAME_MAXLENLinux kernel DLM buffer overflowdlm out-of-bounds writedlm length validationCWE-787 Linux kernel DLMdlm rsb network message overflow
Versions: Linux Kernel < fixes at commits 080e5563f878, 082083c9fbd9, 5f053a2e7209, 67288113c5e6
Affected packages
| Linux | Kernel | 3.4.0 → 6.12.75 |
| Linux | Kernel | 6.13.0 → 6.18.16 |
| Linux | Kernel | 6.19.0 → 6.19.6 |
References
- https://git.kernel.org/stable/c/080e5563f878c64e697b89e7439d730d0daad882
- https://git.kernel.org/stable/c/082083c9fbd99422a0370fe2102144a231c9f5d6
- https://git.kernel.org/stable/c/5f053a2e7209d326cbbc07738fa6d6893d307438
- https://git.kernel.org/stable/c/67288113c5e6cf9e659b4065c0ed6f16100e0c71
- 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
- https://access.redhat.com/errata/RHSA-2026:34094
- https://access.redhat.com/errata/RHSA-2026:34095
- https://access.redhat.com/errata/RHSA-2026:35844
Status: enriched · ingested 2026-07-09T18:00:39.000Z · profiled 2026-07-09T18:30:39.000Z