---
cve: "CVE-2026-80681"
severity: "LOW"
cvss: 3.1
epss: "5.5%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-08-28 08:16:53"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T00:31:27+02:00"
---

# CVE-2026-80681

> 3.1 LOW

## Beschreibung

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().

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.265
- Kernel ≥ 5.15.216
- Kernel ≥ 6.1.183
- Kernel ≥ 6.6.151
- Kernel ≥ 6.12.103
- Kernel ≥ 6.18.44
- Kernel ≥ 7.1.8

## Referenzen

- <https://git.kernel.org/stable/c/6375093eb45cd7d89f1945f939eeae3b29d79f56>
- <https://git.kernel.org/stable/c/1b7f7b653e3557690047c62f03b80a24ea5a58a5>
- <https://git.kernel.org/stable/c/bf045341dfb3e767f0ff94cf240ce3c371973bd4>
- <https://git.kernel.org/stable/c/2355c8c26d2aa1b4385b369e67202e47d460d555>
- <https://git.kernel.org/stable/c/1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585>
- <https://git.kernel.org/stable/c/1235e017aa11cf01e91b613c4c5ed6aa28934fff>
- <https://git.kernel.org/stable/c/c9dceac9e1c7c772c43c732fc0d325e72835801a>
- <https://git.kernel.org/stable/c/1395a676ec15a0a02a2a6d86602324f2d5fd41d5>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-80681) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_