Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 534
Alerts This Week
Warning Icon 1 534

Ubuntu 20.04 LTS: USN-6109-1 Critical: Kernel Denial of Service

ubuntu
Calendar Grey May 25, 2023
Dist Ubuntu Esm H88
Serious security flaws addressed in Ubuntu's Raspberry Pi Linux kernel. Update promptly for protection.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-raspi-5.4: Linux kernel for Raspberry Pi systems

Details:

Zheng Wang discovered that the Intel i915 graphics driver in the Linux

kernel did not properly handle certain error conditions, leading to a

double-free. A local attacker could possibly use this to cause a denial of

service (system crash). (CVE-2022-3707)

Jordy Zomer and Alexandra Sandulescu discovered that the Linux kernel did

not properly implement speculative execution barriers in usercopy functions

in certain situations. A local attacker could use this to expose sensitive

information (kernel memory). (CVE-2023-0459)

It was discovered that the TLS subsystem in the Linux kernel contained a

type confusion vulnerability in some situations. A local attacker could use

this to cause a denial of service (system crash) or possibly expose

sensitive information. (CVE-2...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel information exposure Raspberry Pi

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1085-raspi    5.4.0-1085.96
   linux-image-raspi               5.4.0.1085.115
   linux-image-raspi2              5.4.0.1085.115

Ubuntu 18.04 LTS:
   linux-image-5.4.0-1085-raspi    5.4.0-1085.96~18.04.1
   linux-image-raspi-hwe-18.04     5.4.0.1085.82

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

https://ubuntu.com/security/notices/USN-6109-1

CVE-2022-3707, CVE-2023-0459, CVE-2023-1075, CVE-2023-1078,

CVE-2023-1118, CVE-2023-1513, CVE-2023-2162, CVE-2023-32269

Severity
critical
Lowest
Low
Medium
High
Critical

May 25, 2023

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel information exposure Raspberry Pi

Package Information

https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1085.96
https://launchpad.net/ubuntu/+source/linux-raspi-5.4/5.4.0-1085.96~18.04.1

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.