ZDI-CAN-27159: ZDI-25-651: (Pwn2Own) Red Hat Enterprise Linux CBS Packet Scheduling Use-After-Free Local Privilege Escalation Vulnerability
This vulnerability allows local attackers to escalate privileges on affected installations of Red Hat Enterprise Linux. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of hfscclass objects. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel.
Other sources
This vulnerability allows local attackers to escalate privileges on affected installations of Red Hat Enterprise Linux. 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 8.8. The following CVEs are assigned: CVE-2025-38350.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-CAN-27159?
The severity of ZDI-CAN-27159 is categorized as high due to its potential for privilege escalation.
How do I fix ZDI-CAN-27159?
To fix ZDI-CAN-27159, apply the latest security patches provided by Red Hat for affected installations of Red Hat Enterprise Linux.
Who is affected by ZDI-CAN-27159?
ZDI-CAN-27159 affects local users of Red Hat Enterprise Linux who can execute low-privileged code.
What type of vulnerability is ZDI-CAN-27159?
ZDI-CAN-27159 is a privilege escalation vulnerability that allows local attackers to gain higher-level access.
What must an attacker do to exploit ZDI-CAN-27159?
An attacker must first obtain the ability to execute low-privileged code on the target system to exploit ZDI-CAN-27159.