CVE-2026-74473

CVE CVE-2026-74473EUVD EUVD-2026-59666Published 2026-08-15T12:27:09.000ZLast changed 2026-08-19T16:37:25.000ZCVSS 9.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: vxlan: use pskb_network_may_pull() in route_shortcircuit() route_shortcircuit() currently calls pskb_may_pull(skb, sizeof(struct iphdr)) (or ipv6hdr), which checks if bytes are available starting from skb->data. However, in vxlan_xmit(), skb->data points to the MAC header, so skb_network_offset(skb) is ETH_HLEN (14 bytes). Using pskb_may_pull(skb, 20) only checks 20 bytes from skb->data (which is 14 bytes MAC header + 6 bytes of IP header), leaving the rest of the IP header potentially un-pulled in non-linear frags. Subsequent dereferences of ip_hdr(skb)->daddr can read beyond the pulled linear buffer length. Fix this by using pskb_network_may_pull(), which adds skb_network_offset(skb) to the length check to ensure the full network header is present in the linear buffer.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.18.44; e4f67addf158f98f8197e08974966b18480dc751 <ee799977d7941dbfb11049e17edd9eaf4f8820f7; e4f67addf158f98f8197e08974966b18480dc751 <c419af4924c1593500a40519730ed98575d04a3e; e4f67addf158f98f8197e08974966b18480dc751 <4f3f96e771a20263635bb5e1307c112d613b4bbd; patch: 6.1.183; patch: 7.2; patch: 0; patch: 6.6.151; patch: 5.15.216; 3.8; e4f67addf158f98f8197e08974966b18480dc751 <214ba43faf106cb06cd3dd30999c5c809c868b53; e4f67addf158f98f8197e08974966b18480dc751 <aa0d31376d574ac858a40078431a77127bf04ee4; patch: 5.10.265; e4f67addf158f98f8197e08974966b18480dc751 <6bd0a3a1b5744166946f0c551a6665c3b46b05e4; e4f67addf158f98f8197e08974966b18480dc751 <26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fb; e4f67addf158f98f8197e08974966b18480dc751 <42887be7c4cf283cce02cd0fb6411221167c8b6c; patch: 6.12.103; patch: 7.1.8

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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