What is the vulnerability ID for this Linux Kernel vulnerability?

The vulnerability ID for this Linux Kernel vulnerability is ZDI-CAN-20721.

What is the severity of ZDI-CAN-20721?

The severity of ZDI-CAN-20721 is high with a severity value of 7.8.

How does this vulnerability allow privilege escalation?

This vulnerability allows local attackers to escalate privileges by exploiting a flaw in the processing of nft chains in the Linux Kernel.

What is the affected software for ZDI-CAN-20721?

The affected software for ZDI-CAN-20721 is the Linux Kernel.

Are there any references related to ZDI-CAN-20721?

Yes, there are references related to ZDI-CAN-20721. You can find them at the following links: [reference 1](http://www.zerodayinitiative.com/advisories/ZDI-23-900/), [reference 2](https://lore.kernel.org/netfilter-devel/20230705121515.747251-1-cascardo@canonical.com/T/), [reference 3](https://www.zerodayinitiative.com/advisories/ZDI-23-900/).

Vulnerability/
ZDI-CAN-20721

high

7.8

6/7/2023

16/1/2024

ZDI-CAN-20721: (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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Frequently Asked Questions

What is the vulnerability ID for this Linux Kernel vulnerability?
The vulnerability ID for this Linux Kernel vulnerability is ZDI-CAN-20721.
What is the severity of ZDI-CAN-20721?
The severity of ZDI-CAN-20721 is high with a severity value of 7.8.
How does this vulnerability allow privilege escalation?
This vulnerability allows local attackers to escalate privileges by exploiting a flaw in the processing of nft chains in the Linux Kernel.
What is the affected software for ZDI-CAN-20721?
The affected software for ZDI-CAN-20721 is the Linux Kernel.
Are there any references related to ZDI-CAN-20721?
Yes, there are references related to ZDI-CAN-20721. You can find them at the following links: [reference 1](http://www.zerodayinitiative.com/advisories/ZDI-23-900/), [reference 2](https://lore.kernel.org/netfilter-devel/20230705121515.747251-1-cascardo@canonical.com/T/), [reference 3](https://www.zerodayinitiative.com/advisories/ZDI-23-900/).

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agent/last-modified-date
agent/references
agent/severity
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collector/zdi-advisory
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alias/ZDI-23-900
alias/ZDI-CAN-20721
alias/CVE-2023-35001
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collector/zdi-published
vendor/linux
canonical/linux kernel

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