USN-6387-2: Linux kernel vulnerabilities
First published: Tue Sep 26 2023(Updated: )
Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information. (CVE-2023-20588) It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle L2CAP socket release, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-40283) It was discovered that some network classifier implementations in the Linux kernel contained use-after-free vulnerabilities. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-4128)
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| ubuntu/linux-image-5.4.0-1071-bluefield | <5.4.0-1071.77 | 5.4.0-1071.77 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-1094-raspi | <5.4.0-1094.105 | 5.4.0-1094.105 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-bluefield | <5.4.0.1071.66 | 5.4.0.1071.66 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-raspi | <5.4.0.1094.124 | 5.4.0.1094.124 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-raspi2 | <5.4.0.1094.124 | 5.4.0.1094.124 |
| =20.04 | ||
| All of | ||
| ubuntu/linux-image-5.4.0-1094-raspi | <5.4.0-1094.105~18.04.1 | 5.4.0-1094.105~18.04.1 |
| =18.04 | ||
| All of | ||
| ubuntu/linux-image-raspi-hwe-18.04 | <5.4.0.1094.91 | 5.4.0.1094.91 |
| =18.04 |
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Reference Links
- https://ubuntu.com/security/CVE-2023-4128
- https://ubuntu.com/security/CVE-2023-20588
- https://ubuntu.com/security/CVE-2023-40283
- https://ubuntu.com/security/notices/USN-6343-1
- https://ubuntu.com/security/notices/USN-6383-1
- https://ubuntu.com/security/notices/USN-6385-1
- https://ubuntu.com/security/notices/USN-6386-1
- https://ubuntu.com/security/notices/USN-6387-1
- https://ubuntu.com/security/notices/USN-6388-1
- https://ubuntu.com/security/notices/USN-6396-1
- https://ubuntu.com/security/notices/USN-6386-2
- https://ubuntu.com/security/notices/USN-6386-3
- https://ubuntu.com/security/notices/USN-6396-2
- https://ubuntu.com/security/notices/LSN-0098-1
- https://ubuntu.com/security/notices/USN-6396-3
- https://ubuntu.com/security/notices/USN-6466-1
- https://ubuntu.com/security/notices/USN-6384-1
- https://ubuntu.com/security/notices/USN-6577-1
- https://ubuntu.com/security/notices/USN-6602-1
- https://ubuntu.com/security/notices/USN-6604-1
- https://ubuntu.com/security/notices/USN-6604-2
- https://ubuntu.com/security/notices/LSN-0099-1
- https://launchpad.net/ubuntu/+source/linux-signed-bluefield/5.4.0-1071.77
- https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1094.105
- https://launchpad.net/ubuntu/+source/linux-meta-bluefield/5.4.0.1071.66
- https://launchpad.net/ubuntu/+source/linux-meta-raspi/5.4.0.1094.124
- https://ubuntu.com/security/notices/USN-6387-2 (Advisory)
Child vulnerabilities
(Contains the following vulnerabilities)
Frequently Asked Questions
What is the severity of CVE-2023-20588?
The severity of CVE-2023-20588 is moderate.
How can a local attacker exploit CVE-2023-20588?
A local attacker could exploit CVE-2023-20588 by leaking stale data from division operations on certain AMD processors.
What is the affected software for CVE-2023-20588?
The affected software for CVE-2023-20588 is Ubuntu 20.04 with Linux kernel versions 5.4.0-1071.77, 5.4.0-1094.105, 5.4.0.1071.66, 5.4.0.1094.124, and 5.4.0.1094.124.
How can I fix CVE-2023-20588?
To fix CVE-2023-20588, update your Ubuntu system to Linux kernel version 5.4.0-1071.77, 5.4.0-1094.105, 5.4.0.1071.66, 5.4.0.1094.124, or 5.4.0.1094.124.
Where can I find more information about CVE-2023-20588?
You can find more information about CVE-2023-20588 on the Ubuntu website.
- agent/severity
- agent/type
- agent/last-modified-date
- agent/first-publish-date
- agent/softwarecombine
- agent/title
- agent/event
- agent/description
- agent/weakness
- agent/references
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- version/ubuntu ubuntu/18.04