{"id":"CVE-2026-74474","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-74474","summary":"vxlan: use pskb_network_may_pull() for transmit path header pulls","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: use pskb_network_may_pull() for transmit path header pulls\n\nIn vxlan_xmit(), arp_reduce(), and vxlan_mdb_entry_skb_get(), pskb_may_pull() was\nbeing called to verify the availability of network layer headers (ARP, IPv6/ND,\nIP/IPv6 MDB keys).\n\nHowever, during transmit skb->data points to the MAC header, so skb_network_offset(skb)\nis ETH_HLEN (14 bytes). Using pskb_may_pull(skb, len) only checks len bytes from skb->data\nrather than skb_network_offset(skb) + len, which can leave part of the network header\nin non-linear frags.\n\nReplace these remaining pskb_may_pull() calls with pskb_network_may_pull() to properly\naccount for the MAC header offset.","published":"2026-08-15T12:27:10.037Z","modified":"2026-08-18T03:56:30.241740795Z","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":"6.18.44"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/7076a34b6e33315dc160b4612bfea1c597495585"},{"type":"WEB","url":"https://git.kernel.org/stable/c/94dee751aad627b3645d424b5d0c736d394573e9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b9553558b48db54ac9273e6b98d7263ef5c1a329"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74474.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74474"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T03:56:30.241740795Z"}}