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High 8.1Published Nov 12, 2025
CVE-2025-40158ipv6: use RCU in ip6_output()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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().
- CVSS
- 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Deferred
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before 92803b826e40e49a5e8a6e208f4b4574e9d19426; from 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before 0393f85c3241c19ba8550f04a812e7d19f6b3082; from 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before 11709573cc4e48dc34c80fc7ab9ce5b159e29695 | CNA record |
References
- https://git.kernel.org/stable/c/92803b826e40e49a5e8a6e208f4b4574e9d19426
- https://git.kernel.org/stable/c/0393f85c3241c19ba8550f04a812e7d19f6b3082
- https://git.kernel.org/stable/c/11709573cc4e48dc34c80fc7ab9ce5b159e29695
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.