ZDI-CAN-31604: ZDI-26-837: Linux Kernel XFRM Subsystem Use-After-Free Local Privilege Escalation Vulnerability
Published Oct 29, 2026
This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-98231.
Event History
Oct 29, 2026
Advisory Published
via ZDI·05:00 AM
Data Sourced
via ZDI·05:00 AM
Description
Frequently Asked Questions
1
Who is exposed to this vulnerability?
Affected Linux Kernel installations are exposed where an attacker can execute low-privileged code locally on the target system.
2
What access does an attacker need to exploit it?
The attacker must first be able to execute low-privileged code on the target system. The issue is described as a local privilege-escalation vulnerability.