{"id":"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-\u003esk_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().","modified":"2026-08-18T03:56:57.584071124Z","published":"2026-08-15T05:59:15.385Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74406.json"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5602c48cf87562c2f95b831d690631935e834295"},{"fixed":"9c58c729d32e7cea5772cc44929c6cd61e5a31cd"},{"fixed":"f79c80f173fda9545b220c1f094b65fc06c252d0"},{"fixed":"08f40c0d23c67c3aa4224c3311e134999c721fb4"},{"fixed":"4a8cde6f7281ea2c4c290f9ad9923b3631defceb"},{"fixed":"ef44dac2a37f86eeae6b88ed10a6d60b35387dfd"},{"fixed":"30a45c0bffdd62350261e2f2689fdba426a33578"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74406.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74406.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}