Answer in brief
CVE-2025-40170 records a Unknown severity vulnerability in net: use dst_dev_rcu() in sk_setup_caps(). 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.
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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 <5d1be493d1110c9e720b4c51a6e587bb2fb4ac12 || >=4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 <a805729c0091073d8f0415cfa96c7acd1bc17a48 || >=4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 <99a2ace61b211b0be861b07fbaa062fca4b58879 | 5d1be493d1110c9e720b4c51a6e587bb2fb4ac12, a805729c0091073d8f0415cfa96c7acd1bc17a48, 99a2ace61b211b0be861b07fbaa062fca4b58879 |
| Linux/Linuxgeneric | 4.13 | Not reported |
Published upstream
Nov 12, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: net: use dst_dev_rcu() in sk_setup_caps() Use RCU to protect accesses to dst->dev from sk_setup_caps() and sk_dst_gso_max_size(). Also use dst_dev_rcu() in ip6_dst_mtu_maybe_forward(), and ip_dst_mtu_maybe_forward(). ip4_dst_hoplimit() can use dst_dev_net_rcu().
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2025-40170 records a Unknown severity vulnerability in net: use dst_dev_rcu() in sk_setup_caps(). 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.
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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 <5d1be493d1110c9e720b4c51a6e587bb2fb4ac12 || >=4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 <a805729c0091073d8f0415cfa96c7acd1bc17a48 || >=4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 <99a2ace61b211b0be861b07fbaa062fca4b58879 | 5d1be493d1110c9e720b4c51a6e587bb2fb4ac12, a805729c0091073d8f0415cfa96c7acd1bc17a48, 99a2ace61b211b0be861b07fbaa062fca4b58879 |
| Linux/Linuxgeneric | 4.13 | Not reported |
Published upstream
Nov 12, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: net: use dst_dev_rcu() in sk_setup_caps() Use RCU to protect accesses to dst->dev from sk_setup_caps() and sk_dst_gso_max_size(). Also use dst_dev_rcu() in ip6_dst_mtu_maybe_forward(), and ip_dst_mtu_maybe_forward(). ip4_dst_hoplimit() can use dst_dev_net_rcu().
Quoted source text, attributed separately from HOL analysis.