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CVE-2025-21791

vrf: use RCU protection in l3mdev_l3_out()

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: vrf: use RCU protection in l3mdev_l3_out() l3mdev_l3_out() can be called without RCU being held: raw_sendmsg() ip_push_pending_frames() ip_send_skb() ip_local_out() __ip_local_out() l3mdev_ip_out() Add rcu_read_lock() / rcu_read_unlock() pair to avoid a potential UAF.

Timeline

  1. CVE published
  2. CISA SSVC assessment

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

  3. Record last updated

Affected versions

  • Linux Linux

    From a8e3e1a9f02094145580ea7920c6a1d9aabd5539 · fixed in 6ccaa5797f5362a2aad6baa6ddaf4715ac2dd51e; From a8e3e1a9f02094145580ea7920c6a1d9aabd5539 · fixed in 20a3489b396764cc9376e32a9172bee26a89dc3b; From a8e3e1a9f02094145580ea7920c6a1d9aabd5539 · fixed in 5bb4228c32261d06e4fbece37ec3828bcc005b6b; From a8e3e1a9f02094145580ea7920c6a1d9aabd5539 · fixed in c7574740be8ce68a57d0aece24987b9be2114c3c; From a8e3e1a9f02094145580ea7920c6a1d9aabd5539 · fixed in c40cb5c03e37552d6eff963187109e2c3f78ef6f; From a8e3e1a9f02094145580ea7920c6a1d9aabd5539 · fixed in 022cac1c693add610ae76ede03adf4d9d5a2cf21; From a8e3e1a9f02094145580ea7920c6a1d9aabd5539 · fixed in 7b81425b517accefd46bee854d94954f5c57e019; From a8e3e1a9f02094145580ea7920c6a1d9aabd5539 · fixed in 6d0ce46a93135d96b7fa075a94a88fe0da8e8773

  • Linux Linux

    4.9

  • KernelLinux

    From 4.9.0 · 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