{"id":"CVE-2026-74473","aliases":[],"url":"https://o3.security/vulnerability/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->data.\n\nHowever, in vxlan_xmit(), skb->data 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->data (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)->daddr 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.","published":"2026-08-15T12:27:09.382Z","modified":"2026-08-17T03:54:57.433032824Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.6.151"}],"fix":null,"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-17T03:54:57.433032824Z"}}