Answer in brief
CVE-2026-74473 records a Critical severity (CVSS 9.8) vulnerability in vxlan: use pskb_network_may_pull() in route_shortcircuit(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=e4f67addf158f98f8197e08974966b18480dc751 <42887be7c4cf283cce02cd0fb6411221167c8b6c || >=e4f67addf158f98f8197e08974966b18480dc751 <aa0d31376d574ac858a40078431a77127bf04ee4 || >=e4f67addf158f98f8197e08974966b18480dc751 <ee799977d7941dbfb11049e17edd9eaf4f8820f7 || >=e4f67addf158f98f8197e08974966b18480dc751 <4f3f96e771a20263635bb5e1307c112d613b4bbd || >=e4f67addf158f98f8197e08974966b18480dc751 <26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fb | 42887be7c4cf283cce02cd0fb6411221167c8b6c, aa0d31376d574ac858a40078431a77127bf04ee4, ee799977d7941dbfb11049e17edd9eaf4f8820f7, 4f3f96e771a20263635bb5e1307c112d613b4bbd, 26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fb |
| Linux/Linuxgeneric | 3.8 | Not reported |
| Linux/Linuxgeneric | >=e4f67addf158f98f8197e08974966b18480dc751 <c419af4924c1593500a40519730ed98575d04a3e || >=e4f67addf158f98f8197e08974966b18480dc751 <6bd0a3a1b5744166946f0c551a6665c3b46b05e4 || >=e4f67addf158f98f8197e08974966b18480dc751 <214ba43faf106cb06cd3dd30999c5c809c868b53 || >=e4f67addf158f98f8197e08974966b18480dc751 <42887be7c4cf283cce02cd0fb6411221167c8b6c || >=e4f67addf158f98f8197e08974966b18480dc751 <aa0d31376d574ac858a40078431a77127bf04ee4 || >=e4f67addf158f98f8197e08974966b18480dc751 <ee799977d7941dbfb11049e17edd9eaf4f8820f7 || >=e4f67addf158f98f8197e08974966b18480dc751 <4f3f96e771a20263635bb5e1307c112d613b4bbd || >=e4f67addf158f98f8197e08974966b18480dc751 <26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fb | c419af4924c1593500a40519730ed98575d04a3e, 6bd0a3a1b5744166946f0c551a6665c3b46b05e4, 214ba43faf106cb06cd3dd30999c5c809c868b53, 42887be7c4cf283cce02cd0fb6411221167c8b6c, aa0d31376d574ac858a40078431a77127bf04ee4, ee799977d7941dbfb11049e17edd9eaf4f8820f7, 4f3f96e771a20263635bb5e1307c112d613b4bbd, 26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fb |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.