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  4. CVE 2025 68188 tcp use dstdevrcu in
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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2025-68188

tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()CVE-2025-68188

Answer in brief

CVE-2025-68188 records a Unknown severity vulnerability in tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Dec 16, 2025Updated Oct 21, 2026Source checked Oct 21, 2026First seen by HOL Oct 21, 2026Material review Oct 21, 2026
Upstream Advisory

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric4.12Not reported
Linux/Linuxgeneric>=cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 <e61dfd906ad027a4ade1f89e5fe706a3fcd52527 || >=cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 <bc2b881a0896c111c1041d8bb1f92a3b3873ace5 || >=cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 <06da08d9355bf8e2070459bbedbe372ccc02cc0e || >=cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 <b62a59c18b692f892dcb8109c1c2e653b2abc95ce61dfd906ad027a4ade1f89e5fe706a3fcd52527, bc2b881a0896c111c1041d8bb1f92a3b3873ace5, 06da08d9355bf8e2070459bbedbe372ccc02cc0e, b62a59c18b692f892dcb8109c1c2e653b2abc95c

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to e61dfd906ad027a4ade1f89e5fe706a3fcd52527 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Dec 16, 2025

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 21, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check() Use RCU to avoid a pair of atomic operations and a potential UAF on dst_dev()->flags.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 21, 2026
References
4 linked sources
Open source record