ZDI-23-900: (Pwn2Own) Linux Kernel nftables Incorrect Pointer Scaling Local Privilege Escalation Vulnerability
First published: Thu Jul 06 2023(Updated: )
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 specific flaw exists within the processing of nft chains. The issue results from incorrect pointer scaling, which can result in a memory access past the end of an array. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel.
| Affected Software | Affected Version | How to fix |
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Reference Links
Frequently Asked Questions
What is the severity of ZDI-23-900?
The severity of ZDI-23-900 is high with a CVSS score of 7.8.
How does ZDI-23-900 impact Linux Kernel?
ZDI-23-900 allows local attackers to escalate privileges on affected installations of Linux Kernel.
How can ZDI-23-900 be exploited?
To exploit ZDI-23-900, an attacker must first obtain the ability to execute low-privileged code on the target system.
Is there a fix available for ZDI-23-900?
Currently, there is no information available regarding a fix for ZDI-23-900. It is recommended to stay updated with the latest security patches and advisories from the vendor.
Where can I find more information about ZDI-23-900?
More information about ZDI-23-900 can be found at the Zero Day Initiative advisory page.
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