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VULNERABILITIES

CVE-2026-80681 Details

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().

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: kernel.orgCVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://git.kernel.org/stable/c/1235e017aa11cf01e91b613c4c5ed6aa28934fff kernel.org
https://git.kernel.org/stable/c/1395a676ec15a0a02a2a6d86602324f2d5fd41d5 kernel.org
https://git.kernel.org/stable/c/1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585 kernel.org
https://git.kernel.org/stable/c/1b7f7b653e3557690047c62f03b80a24ea5a58a5 kernel.org
https://git.kernel.org/stable/c/2355c8c26d2aa1b4385b369e67202e47d460d555 kernel.org

see all 8 references

Weakness Enumeration

No weakness enumeration is available for this CVE.

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-80681
NVD Published Date:
Aug 28, 2026
NVD Last Modified:
Aug 29, 2026
Source:
kernel.org
CVE-2026-80681 Details - Not Deferred