CVE-2026-74406

Summary

In the Linux kernel, the following vulnerability has been resolved:

vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().

udp_tunnel_sock_release() could set sk->sk_user_data to NULL while vxlan_gro_prepare_receive() is running.

Let's check if rcu_dereference_sk_user_data() is NULL after skb_gro_remcsum_init().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux5602c48cf87562c2f95b831d690631935e834295 < 9c58c729d32e7cea5772cc44929c6cd61e5a31cdaffected
LinuxLinux5602c48cf87562c2f95b831d690631935e834295 < f79c80f173fda9545b220c1f094b65fc06c252d0affected
LinuxLinux5602c48cf87562c2f95b831d690631935e834295 < 08f40c0d23c67c3aa4224c3311e134999c721fb4affected
LinuxLinux5602c48cf87562c2f95b831d690631935e834295 < 4a8cde6f7281ea2c4c290f9ad9923b3631defcebaffected
LinuxLinux5602c48cf87562c2f95b831d690631935e834295 < ef44dac2a37f86eeae6b88ed10a6d60b35387dfdaffected
LinuxLinux5602c48cf87562c2f95b831d690631935e834295 < 30a45c0bffdd62350261e2f2689fdba426a33578affected
LinuxLinux4.7affected
LinuxLinux0 < 4.7unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References