by Kastro CVE-2026-74406
Linux Linux — vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().
Description · from the CVE record
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
ProductAffectedFixed inSource
Linux5602c48cf87562c2f95b831d690631935e834295 – < 9c58c729d32e7cea5772cc44929c6cd61e5a31cd9c58c729d32e7cea5772cc44929c6cd61e5a31cdCNA
Linux5602c48cf87562c2f95b831d690631935e834295 – < f79c80f173fda9545b220c1f094b65fc06c252d0f79c80f173fda9545b220c1f094b65fc06c252d0CNA
Linux5602c48cf87562c2f95b831d690631935e834295 – < 08f40c0d23c67c3aa4224c3311e134999c721fb408f40c0d23c67c3aa4224c3311e134999c721fb4CNA
Linux5602c48cf87562c2f95b831d690631935e834295 – < 4a8cde6f7281ea2c4c290f9ad9923b3631defceb4a8cde6f7281ea2c4c290f9ad9923b3631defcebCNA
Linux5602c48cf87562c2f95b831d690631935e834295 – < ef44dac2a37f86eeae6b88ed10a6d60b35387dfdef44dac2a37f86eeae6b88ed10a6d60b35387dfdCNA
Linux5602c48cf87562c2f95b831d690631935e834295 – < 30a45c0bffdd62350261e2f2689fdba426a3357830a45c0bffdd62350261e2f2689fdba426a33578CNA
Linux4.7–CNA
Scores by source
Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total