dlm: validate length in dlm_search_rsb_tree
CVE-2026-43125 · published 6 May 2026
How serious is it
- Severity: critical, CVSS score 9.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-43125?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 7210cb7a72a22303cdb225bd1aea28697a17bbae to < 2deafd015ea9a0e75ee5764e20eb1e16bd73efd8, 7210cb7a72a22303cdb225bd1aea28697a17bbae to < 67288113c5e6cf9e659b4065c0ed6f16100e0c71, 7210cb7a72a22303cdb225bd1aea28697a17bbae to < 082083c9fbd99422a0370fe2102144a231c9f5d6, 7210cb7a72a22303cdb225bd1aea28697a17bbae to < 5f053a2e7209d326cbbc07738fa6d6893d307438
- Linux Linux: 3.4
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/2deafd015ea9a0e75ee5764e20eb1e16bd73efd8
- git.kernel.org/stable/c/67288113c5e6cf9e659b4065c0ed6f16100e0c71
- git.kernel.org/stable/c/082083c9fbd99422a0370fe2102144a231c9f5d6
- git.kernel.org/stable/c/5f053a2e7209d326cbbc07738fa6d6893d307438
- git.kernel.org/stable/c/080e5563f878c64e697b89e7439d730d0daad882
Merged from CVE List. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON