There is a current IT security warning for the Linux kernel. You can find out what the vulnerability is, which products are affected and what you can do here.
The Federal Office for Security in Information Technology (BSI) reported a security advisory for the Linux kernel on January 31, 2024. The security vulnerability affects the Linux operating system and the Open Source Linux Kernel product.
The latest manufacturer recommendations regarding updates, workarounds and security patches for this vulnerability can be found here: RedHat Security Advisory (As of January 30, 2024). Other useful links are listed later in this article.
Linux Kernel Security Advisory – Risk: medium
Risk level: 3 (medium)
CVSS Base Score: 5,5
CVSS Temporal Score: 4,8
Remote attack: No
The Common Vulnerability Scoring System (CVSS) is used to assess the severity of vulnerabilities in computer systems. The CVSS standard makes it possible to compare potential or actual security vulnerabilities based on various criteria in order to better prioritize countermeasures. The attributes “none”, “low”, “medium”, “high” and “critical” are used to determine the severity levels of a vulnerability. The Base Score evaluates the requirements for an attack (including authentication, complexity, privileges, user interaction) and its consequences. The temporal score also takes changes over time in the danger situation into account. The severity of the vulnerability discussed here is classified as “medium” according to the CVSS with a base score of 5.5.
Linux Kernel Bug: Multiple vulnerabilities enable denial of service
The kernel represents the core of the Linux operating system.
A local attacker can exploit multiple vulnerabilities in the Linux kernel to carry out a denial of service attack.
The vulnerability is identified with the unique CVE (Common Vulnerabilities and Exposures) identification numbers. CVE-2021-33630 and CVE-2021-33631 traded.
Systems affected by the security gap at a glance
operating system
Linux
Products
Open Source Linux Kernel Open Source Linux Kernel
General measures for dealing with IT security gaps
Users of the affected applications should keep them up to date. When security gaps become known, manufacturers are required to fix them as quickly as possible by developing a patch or a workaround. If security patches are available, install them promptly. For information, consult the sources listed in the next section. These often contain further information about the latest version of the software in question as well as the availability of security patches or information about workarounds. If you have any further questions or uncertainties, please contact your responsible administrator. IT security managers should regularly check when the IT security warning Affected manufacturers provide a new security update.
Sources of updates, patches and workarounds
Here you will find further links with information about bug reports, security fixes and workarounds.
RedHat Security Advisory vom 2024-01-30 (31.01.2024)
For more information, see:
Red Hat Bugzilla dated 2024-01-30 (31.01.2024)
For more information, see:
RedHat Security Advisory vom 2024-01-30 (31.01.2024)
For more information, see:
Red Hat Bugzilla dated 2024-01-30 (31.01.2024)
For more information, see:
Version history of this security alert
This is the initial version of this IT security notice for the Linux kernel. If updates are announced, this text will be updated. You can see the changes made using the version history below.
January 31, 2024 – Initial version
+++ Editorial note: This text was generated based on current BSI data and will be updated in a data-driven manner depending on the warning situation. We accept feedback and comments at [email protected]. +++
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Edited by kns
roj/news.de