CVE-2026-80681
Critical
Description
In the Linux kernel, the following vulnerability has been resolved: vxlan: re-fetch eth header after route_shortcircuit() Before route_shortcircuit(), the eth header pointer is cached from eth_hdr(skb). Inside route_shortcircuit(), pskb_may_pull() can be called, which may reallocate skb->head. In this case, returning to vxlan_xmit() leaves the cached eth pointer pointing to freed memory, leading to a use-after-free when dereferencing eth->h_dest. Fix this by updating eth = eth_hdr(skb) after calling route_shortcircuit().
SeverityCritical
CVSS9.8
Exploit probability—
Product
Linux
PublishedAug 28, 2026
First seenAug 28, 2026
How to fix
Update
- Linux Linux6375093eb45cd7d89f1945f939eeae3b29d79f56, 1b7f7b653e3557690047c62f03b80a24ea5a58a5, bf045341dfb3e767f0ff94cf240ce3c371973bd4, 2355c8c26d2aa1b4385b369e67202e47d460d555, 1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585, 1235e017aa11cf01e91b613c4c5ed6aa28934fff, c9dceac9e1c7c772c43c732fc0d325e72835801a, 1395a676ec15a0a02a2a6d86602324f2d5fd41d5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | ae8840825605f36f98f247323edc150e761cb64e ≤ v < 6375093eb45cd7d89f1945f939eeae3b29d79f56, ae8840825605f36f98f247323edc150e761cb64e ≤ v < 1b7f7b653e3557690047c62f03b80a24ea5a58a5, ae8840825605f36f98f247323edc150e761cb64e ≤ v < bf045341dfb3e767f0ff94cf240ce3c371973bd4, ae8840825605f36f98f247323edc150e761cb64e ≤ v < 2355c8c26d2aa1b4385b369e67202e47d460d555, ae8840825605f36f98f247323edc150e761cb64e ≤ v < 1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585, ae8840825605f36f98f247323edc150e761cb64e ≤ v < 1235e017aa11cf01e91b613c4c5ed6aa28934fff, ae8840825605f36f98f247323edc150e761cb64e ≤ v < c9dceac9e1c7c772c43c732fc0d325e72835801a, ae8840825605f36f98f247323edc150e761cb64e ≤ v < 1395a676ec15a0a02a2a6d86602324f2d5fd41d5, 3.10 | 6375093eb45cd7d89f1945f939eeae3b29d79f56, 1b7f7b653e3557690047c62f03b80a24ea5a58a5, bf045341dfb3e767f0ff94cf240ce3c371973bd4, 2355c8c26d2aa1b4385b369e67202e47d460d555, 1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585, 1235e017aa11cf01e91b613c4c5ed6aa28934fff, c9dceac9e1c7c772c43c732fc0d325e72835801a, 1395a676ec15a0a02a2a6d86602324f2d5fd41d5 |
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