{"id":"CVE-2026-74473","summary":"vxlan: use pskb_network_may_pull() in route_shortcircuit()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: use pskb_network_may_pull() in route_shortcircuit()\n\nroute_shortcircuit() currently calls pskb_may_pull(skb, sizeof(struct iphdr))\n(or ipv6hdr), which checks if bytes are available starting from skb-\u003edata.\n\nHowever, in vxlan_xmit(), skb-\u003edata points to the MAC header, so\nskb_network_offset(skb) is ETH_HLEN (14 bytes). Using pskb_may_pull(skb, 20)\nonly checks 20 bytes from skb-\u003edata (which is 14 bytes MAC header + 6 bytes of\nIP header), leaving the rest of the IP header potentially un-pulled in non-linear\nfrags. Subsequent dereferences of ip_hdr(skb)-\u003edaddr can read beyond the pulled\nlinear buffer length.\n\nFix this by using pskb_network_may_pull(), which adds skb_network_offset(skb) to\nthe length check to ensure the full network header is present in the linear buffer.","modified":"2026-08-17T03:54:57.433032824Z","published":"2026-08-15T12:27:09.382Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74473.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/42887be7c4cf283cce02cd0fb6411221167c8b6c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4f3f96e771a20263635bb5e1307c112d613b4bbd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/aa0d31376d574ac858a40078431a77127bf04ee4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ee799977d7941dbfb11049e17edd9eaf4f8820f7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74473.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74473"},{"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":"e4f67addf158f98f8197e08974966b18480dc751"},{"fixed":"42887be7c4cf283cce02cd0fb6411221167c8b6c"},{"fixed":"aa0d31376d574ac858a40078431a77127bf04ee4"},{"fixed":"ee799977d7941dbfb11049e17edd9eaf4f8820f7"},{"fixed":"4f3f96e771a20263635bb5e1307c112d613b4bbd"},{"fixed":"26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fb"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74473.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.8.0"},{"fixed":"6.6.151"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.103"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.44"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74473.json"}}],"schema_version":"1.9.0"}