CVE-2026-80681

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Source
https://cve.org/CVERecord?id=CVE-2026-80681
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80681.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-80681
Downstream
Published
2026-08-28T06:52:48.896Z
Modified
2026-08-30T03:48:20.954583072Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
vxlan: re-fetch eth header after route_shortcircuit()
Details

In the Linux kernel, the following vulnerability has been resolved:

vxlan: re-fetch eth header after route_shortcircuit()

Before routeshortcircuit(), the eth header pointer is cached from ethhdr(skb).

Inside routeshortcircuit(), pskbmay_pull() can be called, which may reallocate skb->head.

In this case, returning to vxlanxmit() leaves the cached eth pointer pointing to freed memory, leading to a use-after-free when dereferencing eth->hdest.

Fix this by updating eth = ethhdr(skb) after calling routeshortcircuit().

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80681.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
ae8840825605f36f98f247323edc150e761cb64e
Fixed
6375093eb45cd7d89f1945f939eeae3b29d79f56
Fixed
1b7f7b653e3557690047c62f03b80a24ea5a58a5
Fixed
bf045341dfb3e767f0ff94cf240ce3c371973bd4
Fixed
2355c8c26d2aa1b4385b369e67202e47d460d555
Fixed
1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585
Fixed
1235e017aa11cf01e91b613c4c5ed6aa28934fff
Fixed
c9dceac9e1c7c772c43c732fc0d325e72835801a
Fixed
1395a676ec15a0a02a2a6d86602324f2d5fd41d5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80681.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
3.10.0
Fixed
5.10.265
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.216
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.183
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.151
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.103
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.44
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
7.1.8

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80681.json"