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Review reviewHigh

CVE-2025-40075

Linux

In the Linux kernel, the following vulnerability has been resolved: tcp_metrics: use dst_dev_net_rcu() Replace three dst_dev() with a lockdep enabled helper.

CVSS
8.1
EPSS
-
- percentile
CISA KEV
Not listed
Published
2025.10.28
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 8.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: tcp_metrics: use dst_dev_net_rcu() Replace three dst_dev() with a lockdep enabled helper.

Affected product and versions

Product
Linux
Affected versions
>= 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 < 4b89397807eb04986427c4786d065e9442834ad4, >= 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 < 07613a95326ebad2d1b88d883cd72546025a4f3e, >= 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 < 50c127a69cd6285300931853b352a1918cfa180f, >= 4.13
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
Not available