What is the severity of ZDI-21-589?

ZDI-21-589 has a critical severity rating as it allows local privilege escalation on vulnerable Ubuntu installations.

How do I fix ZDI-21-589?

To fix ZDI-21-589, you should update the affected packages in your Ubuntu installation as per the security advisories.

What versions of Ubuntu are affected by ZDI-21-589?

ZDI-21-589 affects specific versions of Ubuntu that use the vulnerable libdevmapper1.02.1 package.

Can ZDI-21-589 be exploited remotely?

No, ZDI-21-589 requires local access to the system to exploit the vulnerability.

What type of attack is ZDI-21-589 associated with?

ZDI-21-589 is associated with local privilege escalation attacks.

Vulnerability/
ZDI-21-589

high

8.8

CWE

190

26/2/2025

ZDI-21-589: (Pwn2Own) Canonical Ubuntu io_uring Integer Overflow Privilege Escalation Vulnerability

This vulnerability allows local attackers to escalate privileges on affected installations of Canonical Ubuntu. 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 buffers in io_uring. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before accessing memory. 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
Ubuntu Unattended Upgrades

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Frequently Asked Questions

What is the severity of ZDI-21-589?
ZDI-21-589 has a critical severity rating as it allows local privilege escalation on vulnerable Ubuntu installations.
How do I fix ZDI-21-589?
To fix ZDI-21-589, you should update the affected packages in your Ubuntu installation as per the security advisories.
What versions of Ubuntu are affected by ZDI-21-589?
ZDI-21-589 affects specific versions of Ubuntu that use the vulnerable libdevmapper1.02.1 package.
Can ZDI-21-589 be exploited remotely?
No, ZDI-21-589 requires local access to the system to exploit the vulnerability.
What type of attack is ZDI-21-589 associated with?
ZDI-21-589 is associated with local privilege escalation attacks.

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alias/ZDI-21-589
alias/ZDI-CAN-13546
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agent/software-canonical-lookup-request
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