An update to the IT security warning of a known vulnerability has been released for the Linux kernel. You can find out how affected users should behave here.
The Federal Office for Security in Information Technology (BSI) published an update on May 1st, 2024 to a security vulnerability for the Linux kernel that became known on February 26th, 2024. The security vulnerability affects the Linux operating system as well as the products Ubuntu Linux, SUSE Linux and Open Source Linux Kernel.
The latest manufacturer recommendations regarding updates, workarounds and security patches for this vulnerability can be found here: SUSE Security Update SUSE-SU-2024:1480-1 (As of April 30, 2024). Other useful links are listed later in this article.
Linux Kernel Security Advisory – Risk: medium
Risk level: 3 (medium)
CVSS Base Score: 5,3
CVSS Temporal Score: 4,6
Remote attack: No
The Common Vulnerability Scoring System (CVSS) is used to assess the vulnerability of computer systems. The CVSS standard makes it possible to compare potential or actual security vulnerabilities based on various metrics 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. According to the CVSS, the threat of the vulnerability discussed here is rated as “medium” with a base score of 5.3.
Linux Kernel Bug: Multiple vulnerabilities allow unspecified attack
The kernel represents the core of the Linux operating system.
A local attacker can exploit multiple vulnerabilities in the Linux kernel to carry out an unspecified attack.
The vulnerability is identified with the unique CVE (Common Vulnerabilities and Exposures) identification numbers. CVE-2021-46921, CVE-2021-46922, CVE-2021-46923, CVE-2021-46924, CVE-2021-46925, CVE-2021-46926, CVE-2021-46927, CVE-2021-46928, CVE-2021-46929, CVE-2021-46930, CVE-2021-46931, CVE-2021-46932, CVE-2021-46933, CVE-2021-46934, CVE-2021-46935, CVE-2021-46936 und CVE-2021-46937 traded.
Systems affected by the security gap at a glance
operating system
Linux
Products
Ubuntu Linux (cpe:/o:canonical:ubuntu_linux)
SUSE Linux (cpe:/o:suse:suse_linux)
Open Source Linux Kernel (cpe:/o:linux:linux_kernel)
General recommendations for dealing with IT security gaps
Users of the affected systems 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 new security updates are available, install them as soon as possible. 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 the sources mentioned to see whether a new security update is available.
Sources of updates, patches and workarounds
Here you will find further links with information about bug reports, security fixes and workarounds.
SUSE Security Update SUSE-SU-2024:1480-1 vom 2024-04-30 (01.05.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:1466-1 vom 2024-04-29 (29.04.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:1454-1 vom 2024-04-26 (28.04.2024)
For more information, see:
Ubuntu Security Notice USN-6739-1 vom 2024-04-19 (21.04.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:1322-2 vom 2024-04-18 (18.04.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:1332-2 vom 2024-04-18 (18.04.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:1332-1 vom 2024-04-18 (18.04.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:1322-1 vom 2024-04-17 (16.04.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:1321-1 vom 2024-04-17 (16.04.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:1320-1 vom 2024-04-16 (16.04.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:0977-1 vom 2024-03-22 (24.03.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:0975-1 vom 2024-03-22 (24.03.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:0926-1 vom 2024-03-22 (24.03.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:0925-1 vom 2024-03-22 (24.03.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:0976-1 vom 2024-03-22 (24.03.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:0900-2 vom 2024-03-15 (17.03.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:0910-1 vom 2024-03-15 (17.03.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:0900-1 vom 2024-03-14 (14.03.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:0858-1 vom 2024-03-13 (12.03.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:0856-1 vom 2024-03-13 (12.03.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:0857-1 vom 2024-03-13 (12.03.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:0855-1 vom 2024-03-12 (12.03.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
CVE Announcement on lore.kernel.org dated 2024-02-26 (26.02.2024)
For more information, see:
Version history of this security alert
This is the 11th version of this IT Security Notice for Linux Kernel. If further updates are announced, this text will be updated. You can see the changes made using the version history below.
02/26/2024 – Initial version
03/12/2024 – New updates from SUSE added
03/14/2024 – New updates from SUSE added
03/17/2024 – New updates from SUSE added
03/24/2024 – New updates from SUSE added
April 16, 2024 – New updates from SUSE added
April 18, 2024 – New updates from SUSE added
April 21, 2024 – New updates of Ubuntu added
April 28, 2024 – New updates from SUSE added
April 29, 2024 – New updates from SUSE added
May 1, 2024 – New updates from SUSE added
+++ 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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