mptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable(). (CVE-2025-40133) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2025-40133

mptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable().

Answer in brief

CVE-2025-40133 records a Unknown severity vulnerability in mptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable().. 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 Nov 12, 2025Updated Aug 5, 2026Source checked Aug 6, 2026First seen by HOL Aug 5, 2026Material review Aug 5, 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
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=27069e7cb3d1cea9377069266acf19b9cc5ad0ae <ad16235c9d3ef7ec17c109ff39b7504f49d17072 \|\| >=27069e7cb3d1cea9377069266acf19b9cc5ad0ae <cc976ec9e38bb79409de3261ba1dbb6868e2a53e \|\| >=27069e7cb3d1cea9377069266acf19b9cc5ad0ae <893c49a78d9f85e4b8081b908fb7c407d018106a	ad16235c9d3ef7ec17c109ff39b7504f49d17072, cc976ec9e38bb79409de3261ba1dbb6868e2a53e, 893c49a78d9f85e4b8081b908fb7c407d018106a
Linux/Linuxgeneric	6.12	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to ad16235c9d3ef7ec17c109ff39b7504f49d17072 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Nov 12, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 5, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: mptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable(). mptcp_active_enable() is called from subflow_finish_connect(), which is icsk->icsk_af_ops->sk_rx_dst_set() and it's not always under RCU. Using sk_dst_get(sk)->dev could trigger UAF. Let's use __sk_dst_get() and dst_dev_rcu().

Quoted source text, attributed separately from HOL analysis.

Back to active CVEs

Unknown severity · Source severity not reportedCVE-2025-40133

mptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable().

Answer in brief

Analysis pending evidence review

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

Published Nov 12, 2025Updated Aug 5, 2026Source checked Aug 6, 2026First seen by HOL Aug 5, 2026Material review Aug 5, 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
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=27069e7cb3d1cea9377069266acf19b9cc5ad0ae <ad16235c9d3ef7ec17c109ff39b7504f49d17072 \|\| >=27069e7cb3d1cea9377069266acf19b9cc5ad0ae <cc976ec9e38bb79409de3261ba1dbb6868e2a53e \|\| >=27069e7cb3d1cea9377069266acf19b9cc5ad0ae <893c49a78d9f85e4b8081b908fb7c407d018106a	ad16235c9d3ef7ec17c109ff39b7504f49d17072, cc976ec9e38bb79409de3261ba1dbb6868e2a53e, 893c49a78d9f85e4b8081b908fb7c407d018106a
Linux/Linuxgeneric	6.12	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to ad16235c9d3ef7ec17c109ff39b7504f49d17072 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Nov 12, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 5, 2026

Sources and claim methodology

Upstream source description

Quoted source text, attributed separately from HOL analysis.

mptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable().

Key facts

Why this deserves its current priority

Affected scope and exposure questions

Recommended response

Evidence timeline and material changes

Sources and claim methodology

Related CVEs

mptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable().

Key facts

Why this deserves its current priority

Affected scope and exposure questions

Recommended response

Evidence timeline and material changes

Sources and claim methodology

Related CVEs