- Vulnerability/
- USN-4343-1
28/4/2020
USN-4343-1: Linux kernel vulnerability
First published: Tue Apr 28 2020(Updated: )
Al Viro discovered that the Linux kernel for s390x systems did not properly perform page table upgrades for kernel sections that use secondary address mode. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| ubuntu/linux-image-5.4.0-28-generic | <5.4.0-28.32 | 5.4.0-28.32 |
| Ubuntu Linux | =20.04 | |
| All of | ||
| ubuntu/linux-image-5.4.0-28-generic-lpae | <5.4.0-28.32 | 5.4.0-28.32 |
| Ubuntu Linux | =20.04 | |
| All of | ||
| ubuntu/linux-image-5.4.0-28-lowlatency | <5.4.0-28.32 | 5.4.0-28.32 |
| Ubuntu Linux | =20.04 | |
| All of | ||
| ubuntu/linux-image-generic | <5.4.0.28.33 | 5.4.0.28.33 |
| Ubuntu Linux | =20.04 | |
| All of | ||
| ubuntu/linux-image-generic-lpae | <5.4.0.28.33 | 5.4.0.28.33 |
| Ubuntu Linux | =20.04 | |
| All of | ||
| ubuntu/linux-image-lowlatency | <5.4.0.28.33 | 5.4.0.28.33 |
| Ubuntu Linux | =20.04 | |
| All of | ||
| ubuntu/linux-image-oem | <5.4.0.28.33 | 5.4.0.28.33 |
| Ubuntu Linux | =20.04 | |
| All of | ||
| ubuntu/linux-image-oem-osp1 | <5.4.0.28.33 | 5.4.0.28.33 |
| Ubuntu Linux | =20.04 | |
| All of | ||
| ubuntu/linux-image-virtual | <5.4.0.28.33 | 5.4.0.28.33 |
| Ubuntu Linux | =20.04 |
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Reference Links
- https://ubuntu.com/security/CVE-2020-11884
- https://ubuntu.com/security/notices/USN-4345-1
- https://ubuntu.com/security/notices/USN-4342-1
- https://launchpad.net/ubuntu/+source/linux-signed/5.4.0-28.32
- https://launchpad.net/ubuntu/+source/linux/5.4.0-28.32
- https://launchpad.net/ubuntu/+source/linux-meta/5.4.0.28.33
- https://ubuntu.com/security/notices/USN-4343-1 (Advisory)
Frequently Asked Questions
What is the severity of USN-4343-1?
The severity of USN-4343-1 is high.
Who discovered the Linux kernel vulnerability in USN-4343-1?
Al Viro discovered the Linux kernel vulnerability.
What is the impact of the vulnerability in USN-4343-1?
The vulnerability can cause a denial of service (system crash) or allow the execution of arbitrary code.
Which systems are affected by the vulnerability in USN-4343-1?
The vulnerability affects s390x systems.
How can I fix the vulnerability in USN-4343-1?
Update to version 5.4.0-28.32 or later.
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