CVE-2025-21760
HIGH severity · CVSS 8.1 · Use-after-free
8.1CVSS HIGH
Summary
In the Linux kernel, the following vulnerability has been resolved: ndisc: extend RCU protection in ndisc_send_skb() ndisc_send_skb() can be called without RTNL or RCU held. Acquire rcu_read_lock() earlier, so that we can use dev_net_rcu() and avoid a potential UAF.
Impact & exploitability
Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)10%
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/04e05112f10354ffc3bb6cc796d553bab161594c ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/04e05112f10354ffc3bb6cc796d553bab161594cPatch
- https://git.kernel.org/stable/c/10a1f3fece2f0d23a3a618b72b2b4e6f408ef7d1Patch
- https://git.kernel.org/stable/c/4d576202b90b1b95a7c428a80b536f91b8201bccPatch
- https://git.kernel.org/stable/c/789230e5a8c1097301afc802e242c79bc8835c67Patch
- https://git.kernel.org/stable/c/a9319d800b5701e7f5e3fa71a5b7c4831fc20d6dPatch
- https://git.kernel.org/stable/c/ae38982f521621c216fc2f5182cd091f4734641dPatch
- https://git.kernel.org/stable/c/e24d225e4cb8cf108bde00b76594499b98f0a74dPatch
- https://git.kernel.org/stable/c/ed6ae1f325d3c43966ec1b62ac1459e2b8e45640Patch