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Ubuntu 22.04 LTS USN-6385-1 Critical: Kernel Issues Resolved

ubuntu
Calendar Grey September 19, 2023
Dist Ubuntu Esm H88
Multiple kernel vulnerabilities patched in Ubuntu 22.04 LTS; installations need to be updated for safeguarding against local and remote attacks.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-6.0: Linux kernel for OEM systems

Details:

It was discovered that some AMD x86-64 processors with SMT enabled could

speculatively execute instructions using a return address from a sibling

thread. A local attacker could possibly use this to expose sensitive

information. (CVE-2022-27672)

William Zhao discovered that the Traffic Control (TC) subsystem in the

Linux kernel did not properly handle network packet retransmission in

certain situations. A local attacker could use this to cause a denial of

service (kernel deadlock). (CVE-2022-4269)

Jordy Zomer and Alexandra Sandulescu discovered that syscalls invoking the

do_prlimit() function in the Linux kernel did not properly handle

speculative execution barriers. A local attacker could use this to expose

sensitive information (kernel memory). (CVE-2023-0458)

It was discovered that the TLS subsystem in the Linux kernel c...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service system update local attack ubuntu linux kernel

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-6.0.0-1021-oem      6.0.0-1021.21
   linux-image-oem-22.04b          6.0.0.1021.21

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

CVE-2022-27672, CVE-2022-4269, CVE-2023-0458, CVE-2023-1075,

CVE-2023-1076, CVE-2023-1206, CVE-2023-1380, CVE-2023-1611,

CVE-2023-2002, CVE-2023-20593, CVE-2023-2162, CVE-2023-2163,

CVE-2023-2235, CVE-2023-2269, CVE-2023-28328, CVE-2023-28466,

CVE-2023-2898, CVE-2023-3090, CVE-2023-3141, CVE-2023-31436,

CVE-2023-3220, CVE-2023-32269, CVE-2023-3390, CVE-2023-3609,

CVE-2023-3610, CVE-2023-3611, CVE-2023-3776, CVE-2023-3777,

CVE-2023-3863, CVE-2023-3995, CVE-2023-4004, CVE-2023-4015,

CVE-2023-40283, CVE-2023-4128, CVE-2023-4194, CVE-2023-4273,

CVE-2023-4569

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6385-1

Topics%20covered

Topics Covered

security advisory denial of service system update local attack ubuntu linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-6.0/6.0.0-1021.21

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