CVE-2026-74473

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-74473

Key Details

CVE	CVE-2026-74473
CVSS Score / Version	9.8 (Critical) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-74473
CVE	https://www.cve.org/CVERecord?id=CVE-2026-74473

Source

Reference

NVD

CVE