CVE-2025-40158
CVE-2025-40158 is a security vulnerability that is still awaiting full analysis and scoring. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- EPSS exploit prediction: 0% (9th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-124925
- Published:
- Last modified:
Description
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().
Frequently asked questions
- What is CVE-2025-40158?
- 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().
- Is CVE-2025-40158 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-40158?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-40158 have an EU (EUVD) identifier?
- Yes. CVE-2025-40158 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-124925.
- When was CVE-2025-40158 published?
- CVE-2025-40158 was published on 2025-11-12 and last updated on 2026-06-17.