{"id":"CVE-2026-74473","title":"vxlan: use pskb_network_may_pull() in route_shortcircuit()","summary":"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 …","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= e4f67addf158f98f8197e08974966b18480dc751 < c419af4924c1593500a40519730ed98575d04a3e","Linux >= e4f67addf158f98f8197e08974966b18480dc751 < 6bd0a3a1b5744166946f0c551a6665c3b46b05e4","Linux >= e4f67addf158f98f8197e08974966b18480dc751 < 214ba43faf106cb06cd3dd30999c5c809c868b53","Linux >= e4f67addf158f98f8197e08974966b18480dc751 < 42887be7c4cf283cce02cd0fb6411221167c8b6c","Linux >= e4f67addf158f98f8197e08974966b18480dc751 < aa0d31376d574ac858a40078431a77127bf04ee4","Linux >= e4f67addf158f98f8197e08974966b18480dc751 < ee799977d7941dbfb11049e17edd9eaf4f8820f7","Linux >= e4f67addf158f98f8197e08974966b18480dc751 < 4f3f96e771a20263635bb5e1307c112d613b4bbd","Linux >= e4f67addf158f98f8197e08974966b18480dc751 < 26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fb","Linux 3.8"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-16T18:57:24.199754Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:05:47.966Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74473","references":[{"url":"https://git.kernel.org/stable/c/c419af4924c1593500a40519730ed98575d04a3e"},{"url":"https://git.kernel.org/stable/c/6bd0a3a1b5744166946f0c551a6665c3b46b05e4"},{"url":"https://git.kernel.org/stable/c/214ba43faf106cb06cd3dd30999c5c809c868b53"},{"url":"https://git.kernel.org/stable/c/42887be7c4cf283cce02cd0fb6411221167c8b6c"},{"url":"https://git.kernel.org/stable/c/aa0d31376d574ac858a40078431a77127bf04ee4"},{"url":"https://git.kernel.org/stable/c/ee799977d7941dbfb11049e17edd9eaf4f8820f7"},{"url":"https://git.kernel.org/stable/c/4f3f96e771a20263635bb5e1307c112d613b4bbd"},{"url":"https://git.kernel.org/stable/c/26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fb"}],"tags":["cve.org"],"epss":0.00525,"epssPercentile":0.43245,"ingestedAt":"2026-10-16T19:46:24.358Z","slug":"CVE-2026-74473","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= e4f67addf158f98f8197e08974966b18480dc751 < c419af4924c1593500a40519730ed98575d04a3e`\n- `Linux >= e4f67addf158f98f8197e08974966b18480dc751 < 6bd0a3a1b5744166946f0c551a6665c3b46b05e4`\n- `Linux >= e4f67addf158f98f8197e08974966b18480dc751 < 214ba43faf106cb06cd3dd30999c5c809c868b53`\n- `Linux >= e4f67addf158f98f8197e08974966b18480dc751 < 42887be7c4cf283cce02cd0fb6411221167c8b6c`\n- `Linux >= e4f67addf158f98f8197e08974966b18480dc751 < aa0d31376d574ac858a40078431a77127bf04ee4`\n- `Linux >= e4f67addf158f98f8197e08974966b18480dc751 < ee799977d7941dbfb11049e17edd9eaf4f8820f7`\n- `Linux >= e4f67addf158f98f8197e08974966b18480dc751 < 4f3f96e771a20263635bb5e1307c112d613b4bbd`\n- `Linux >= e4f67addf158f98f8197e08974966b18480dc751 < 26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fb`\n- `Linux 3.8`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}