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CVE-2025-21760

ndisc: extend RCU protection in ndisc_send_skb()

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.4.291, 5.10.235, 5.15.179, 6.1.129, 6.6.79, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated
  4. EPSS reached 10%

    FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

  • Linux Linux

    From 1762f7e88eb34f653b4a915be99a102e347dd45e · fixed in 10a1f3fece2f0d23a3a618b72b2b4e6f408ef7d1; From 1762f7e88eb34f653b4a915be99a102e347dd45e · fixed in 4d576202b90b1b95a7c428a80b536f91b8201bcc; From 1762f7e88eb34f653b4a915be99a102e347dd45e · fixed in e24d225e4cb8cf108bde00b76594499b98f0a74d; From 1762f7e88eb34f653b4a915be99a102e347dd45e · fixed in a9319d800b5701e7f5e3fa71a5b7c4831fc20d6d; From 1762f7e88eb34f653b4a915be99a102e347dd45e · fixed in ae38982f521621c216fc2f5182cd091f4734641d; From 1762f7e88eb34f653b4a915be99a102e347dd45e · fixed in 789230e5a8c1097301afc802e242c79bc8835c67; From 1762f7e88eb34f653b4a915be99a102e347dd45e · fixed in 04e05112f10354ffc3bb6cc796d553bab161594c; From 1762f7e88eb34f653b4a915be99a102e347dd45e · fixed in ed6ae1f325d3c43966ec1b62ac1459e2b8e45640

  • Linux Linux

    2.6.26

  • KernelLinux

    From 2.6.26 · fixed in 5.4.291; From 5.5.0 · fixed in 5.10.235; From 5.11.0 · fixed in 5.15.179; From 5.16.0 · fixed in 6.1.129; From 6.2.0 · fixed in 6.6.79; From 6.7.0 · fixed in 6.12.16; From 6.13.0 · fixed in 6.13.4

References 8

git.kernel.org