Answer in brief
CVE-2025-40158 records a Unknown severity vulnerability in ipv6: use RCU in ip6_output(). 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 <0393f85c3241c19ba8550f04a812e7d19f6b3082 || >=4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 <11709573cc4e48dc34c80fc7ab9ce5b159e29695 | 0393f85c3241c19ba8550f04a812e7d19f6b3082, 11709573cc4e48dc34c80fc7ab9ce5b159e29695 |
| 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: ipv6: use RCU in ip6_output() Use RCU in ip6_output() in order to use dst_dev_rcu() to prevent possible UAF. We can remove rcu_read_lock()/rcu_read_unlock() pairs from ip6_finish_output2().
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2025-40158 records a Unknown severity vulnerability in ipv6: use RCU in ip6_output(). 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 <0393f85c3241c19ba8550f04a812e7d19f6b3082 || >=4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 <11709573cc4e48dc34c80fc7ab9ce5b159e29695 | 0393f85c3241c19ba8550f04a812e7d19f6b3082, 11709573cc4e48dc34c80fc7ab9ce5b159e29695 |
| 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: ipv6: use RCU in ip6_output() Use RCU in ip6_output() in order to use dst_dev_rcu() to prevent possible UAF. We can remove rcu_read_lock()/rcu_read_unlock() pairs from ip6_finish_output2().
Quoted source text, attributed separately from HOL analysis.