1. Ubuntu Security Notices
  2. USN-6624-1

USN-6624-1: Linux kernel vulnerabilities

Publication date

7 February 2024

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

Marek Marczykowski-Górecki discovered that the Xen event channel
infrastructure implementation in the Linux kernel contained a race
condition. An attacker in a guest VM could possibly use this to cause a
denial of service (paravirtualized device unavailability). (CVE-2023-34324)

Zheng Wang discovered a use-after-free in the Renesas Ethernet AVB driver
in the Linux kernel during device removal. A privileged attacker could use
this to cause a denial of service (system crash). (CVE-2023-35827)

Tom Dohrmann discovered that the Secure Encrypted Virtualization (SEV)
implementation for AMD processors in the Linux kernel contained a race
condition when accessing MMIO registers. A local attacker in a SEV guest VM
could possibly use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (

Marek Marczykowski-Górecki discovered that the Xen event channel
infrastructure implementation in the Linux kernel contained a race
condition. An attacker in a guest VM could possibly use this to cause a
denial of service (paravirtualized device unavailability). (CVE-2023-34324)

Zheng Wang discovered a use-after-free in the Renesas Ethernet AVB driver
in the Linux kernel during device removal. A privileged attacker could use
this to cause a denial of service (system crash). (CVE-2023-35827)

Tom Dohrmann discovered that the Secure Encrypted Virtualization (SEV)
implementation for AMD processors in the Linux kernel contained a race
condition when accessing MMIO registers. A local attacker in a SEV guest VM
could possibly use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2023-46813)

It was discovered that the io_uring subsystem in the Linux kernel contained
a race condition, leading to a null pointer dereference vulnerability. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2023-46862)

It was discovered that the netfilter subsystem in the Linux kernel did not
properly validate inner tunnel netlink attributes, leading to a null
pointer dereference vulnerability. A local attacker could use this to cause
a denial of service (system crash). (CVE-2023-5972)

It was discovered that the TLS subsystem in the Linux kernel did not
properly perform cryptographic operations in some situations, leading to a
null pointer dereference vulnerability. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-6176)

Jann Horn discovered that a race condition existed in the Linux kernel when
handling io_uring over sockets, 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-2023-6531)

Xingyuan Mo discovered that the netfilter subsystem in the Linux kernel did
not properly handle dynset expressions passed from userspace, leading to a
null pointer dereference vulnerability. A local attacker could use this to
cause a denial of service (system crash). (CVE-2023-6622)

It was discovered that the TIPC protocol implementation in the Linux kernel
did not properly handle locking during tipc_crypto_key_revoke() operations.
A local attacker could use this to cause a denial of service (kernel
deadlock). (CVE-2024-0641)

Update instructions

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

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
23.10 mantic linux-image-6.5.0-1007-starfive –  6.5.0-1007.8
linux-image-6.5.0-1009-laptop –  6.5.0-1009.12
linux-image-6.5.0-1010-raspi –  6.5.0-1010.13
linux-image-6.5.0-1013-aws –  6.5.0-1013.13
linux-image-6.5.0-1013-gcp –  6.5.0-1013.13
linux-image-6.5.0-1015-oracle –  6.5.0-1015.15
linux-image-6.5.0-17-generic –  6.5.0-17.17
linux-image-6.5.0-17-generic-64k –  6.5.0-17.17
linux-image-6.5.0-17-lowlatency –  6.5.0-17.17.1
linux-image-6.5.0-17-lowlatency-64k –  6.5.0-17.17.1
linux-image-aws –  6.5.0.1013.13
linux-image-gcp –  6.5.0.1013.13
linux-image-generic –  6.5.0.17.19
linux-image-generic-64k –  6.5.0.17.19
linux-image-generic-lpae –  6.5.0.17.19
linux-image-kvm –  6.5.0.17.19
linux-image-laptop-23.10 –  6.5.0.1009.12
linux-image-lowlatency –  6.5.0.17.17.14
linux-image-lowlatency-64k –  6.5.0.17.17.14
linux-image-oracle –  6.5.0.1015.15
linux-image-raspi –  6.5.0.1010.11
linux-image-raspi-nolpae –  6.5.0.1010.11
linux-image-starfive –  6.5.0.1007.9
linux-image-virtual –  6.5.0.17.19
22.04 jammy linux-image-6.5.0-1014-oem –  6.5.0-1014.15
linux-image-6.5.0-17-generic –  6.5.0-17.17~22.04.1
linux-image-6.5.0-17-generic-64k –  6.5.0-17.17~22.04.1
linux-image-6.5.0-17-lowlatency –  6.5.0-17.17.1.1.1~22.04.1
linux-image-6.5.0-17-lowlatency-64k –  6.5.0-17.17.1.1.1~22.04.1
linux-image-generic-64k-hwe-22.04 –  6.5.0.17.17~22.04.9
linux-image-generic-hwe-22.04 –  6.5.0.17.17~22.04.9
linux-image-lowlatency-64k-hwe-22.04 –  6.5.0.17.17.1.1.1~22.04.6
linux-image-lowlatency-hwe-22.04 –  6.5.0.17.17.1.1.1~22.04.6
linux-image-oem-22.04d –  6.5.0.1014.16
linux-image-virtual-hwe-22.04 –  6.5.0.17.17~22.04.9

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References

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