{"id":"CVE-2026-74406","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-74406","summary":"vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().\n\nudp_tunnel_sock_release() could set sk->sk_user_data to NULL\nwhile vxlan_gro_prepare_receive() is running.\n\nLet's check if rcu_dereference_sk_user_data() is NULL after\nskb_gro_remcsum_init().","published":"2026-08-15T05:59:15.385Z","modified":"2026-08-18T03:56:57.584071124Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.1.178"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/08f40c0d23c67c3aa4224c3311e134999c721fb4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/30a45c0bffdd62350261e2f2689fdba426a33578"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4a8cde6f7281ea2c4c290f9ad9923b3631defceb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9c58c729d32e7cea5772cc44929c6cd61e5a31cd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ef44dac2a37f86eeae6b88ed10a6d60b35387dfd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f79c80f173fda9545b220c1f094b65fc06c252d0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74406.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74406"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T03:56:57.584071124Z"}}