CVE-2025-21791

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa8e3e1a9f02094145580ea7920c6a1d9aabd5539 < 6ccaa5797f5362a2aad6baa6ddaf4715ac2dd51eaffected
LinuxLinuxa8e3e1a9f02094145580ea7920c6a1d9aabd5539 < 20a3489b396764cc9376e32a9172bee26a89dc3baffected
LinuxLinuxa8e3e1a9f02094145580ea7920c6a1d9aabd5539 < 5bb4228c32261d06e4fbece37ec3828bcc005b6baffected
LinuxLinuxa8e3e1a9f02094145580ea7920c6a1d9aabd5539 < c7574740be8ce68a57d0aece24987b9be2114c3caffected
LinuxLinuxa8e3e1a9f02094145580ea7920c6a1d9aabd5539 < c40cb5c03e37552d6eff963187109e2c3f78ef6faffected
LinuxLinuxa8e3e1a9f02094145580ea7920c6a1d9aabd5539 < 022cac1c693add610ae76ede03adf4d9d5a2cf21affected
LinuxLinuxa8e3e1a9f02094145580ea7920c6a1d9aabd5539 < 7b81425b517accefd46bee854d94954f5c57e019affected
LinuxLinuxa8e3e1a9f02094145580ea7920c6a1d9aabd5539 < 6d0ce46a93135d96b7fa075a94a88fe0da8e8773affected
LinuxLinux4.9affected
LinuxLinux0 < 4.9unaffected
LinuxLinux5.4.291 <= 5.4.*unaffected
LinuxLinux5.10.235 <= 5.10.*unaffected
LinuxLinux5.15.179 <= 5.15.*unaffected
LinuxLinux6.1.129 <= 6.1.*unaffected
LinuxLinux6.6.79 <= 6.6.*unaffected
LinuxLinux6.12.16 <= 6.12.*unaffected
LinuxLinux6.13.4 <= 6.13.*unaffected
LinuxLinux6.14 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

CVE Program Container

Additional References

References