USN-6444-1: Linux kernel vulnerabilities
19 October 2023
Several security issues were fixed in the Linux kernel.
Releases
Packages
- linux - Linux kernel
- linux-aws - Linux kernel for Amazon Web Services (AWS) systems
- linux-aws-6.2 - Linux kernel for Amazon Web Services (AWS) systems
- linux-azure - Linux kernel for Microsoft Azure Cloud systems
- linux-azure-6.2 - Linux kernel for Microsoft Azure cloud systems
- linux-azure-fde-6.2 - Linux kernel for Microsoft Azure CVM cloud systems
- linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
- linux-gcp-6.2 - Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe-6.2 - Linux hardware enablement (HWE) kernel
- linux-kvm - Linux kernel for cloud environments
- linux-lowlatency - Linux low latency kernel
- linux-lowlatency-hwe-6.2 - Linux low latency kernel
- linux-oracle - Linux kernel for Oracle Cloud systems
- linux-raspi - Linux kernel for Raspberry Pi systems
- linux-starfive - Linux kernel for StarFive processors
Details
Ross Lagerwall discovered that the Xen netback backend driver in the Linux
kernel did not properly handle certain unusual packets from a
paravirtualized network frontend, leading to a buffer overflow. An attacker
in a guest VM could use this to cause a denial of service (host system
crash) or possibly execute arbitrary code. (CVE-2023-34319)
Bien Pham discovered that the netfiler subsystem in the Linux kernel
contained a race condition, leading to a use-after-free vulnerability. A
local user could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2023-4244)
Kyle Zeng discovered that the networking stack implementation in the Linux
kernel did not properly validate skb object size in certain conditions. An
attacker could use this cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2023-42752)
Kyle Zeng discovered that the netfiler subsystem in the Linux kernel did
not properly calculate array offsets, leading to a out-of-bounds write
vulnerability. A local user could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-42753)
Kyle Zeng discovered that the IPv4 Resource Reservation Protocol (RSVP)
classifier implementation in the Linux kernel contained an out-of-bounds
read vulnerability. A local attacker could use this to cause a denial of
service (system crash). Please note that kernel packet classifier support
for RSVP has been removed to resolve this vulnerability. (CVE-2023-42755)
Kyle Zeng discovered that the netfilter subsystem in the Linux kernel
contained a race condition in IP set operations in certain situations. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2023-42756)
Bing-Jhong Billy Jheng discovered that the Unix domain socket
implementation in the Linux kernel contained a race condition in certain
situations, 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-2023-4622)
Budimir Markovic discovered that the qdisc implementation in the Linux
kernel did not properly validate inner classes, leading to a use-after-free
vulnerability. A local user could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-4623)
Alex Birnberg discovered that the netfilter subsystem in the Linux kernel
did not properly validate register length, leading to an out-of- bounds
write vulnerability. A local attacker could possibly use this to cause a
denial of service (system crash). (CVE-2023-4881)
It was discovered that the Quick Fair Queueing scheduler implementation in
the Linux kernel did not properly handle network packets in certain
conditions, 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-2023-4921)
Kevin Rich discovered that the netfilter subsystem in the Linux kernel did
not properly handle removal of rules from chain bindings in certain
circumstances, leading to a use-after-free vulnerability. A local attacker
could possibly use this to cause a denial of service (system crash) or
execute arbitrary code. (CVE-2023-5197)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 23.04
-
linux-image-6.2.0-1007-starfive
-
6.2.0-1007.8
-
linux-image-6.2.0-1014-aws
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6.2.0-1014.14
-
linux-image-6.2.0-1014-oracle
-
6.2.0-1014.14
-
linux-image-6.2.0-1015-azure
-
6.2.0-1015.15
-
linux-image-6.2.0-1015-kvm
-
6.2.0-1015.15
-
linux-image-6.2.0-1015-lowlatency
-
6.2.0-1015.15
-
linux-image-6.2.0-1015-lowlatency-64k
-
6.2.0-1015.15
-
linux-image-6.2.0-1015-raspi
-
6.2.0-1015.17
-
linux-image-6.2.0-1017-gcp
-
6.2.0-1017.19
-
linux-image-6.2.0-35-generic
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6.2.0-35.35
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linux-image-6.2.0-35-generic-64k
-
6.2.0-35.35
-
linux-image-6.2.0-35-generic-lpae
-
6.2.0-35.35
-
linux-image-aws
-
6.2.0.1014.15
-
linux-image-azure
-
6.2.0.1015.15
-
linux-image-gcp
-
6.2.0.1017.17
-
linux-image-generic
-
6.2.0.35.35
-
linux-image-generic-64k
-
6.2.0.35.35
-
linux-image-generic-lpae
-
6.2.0.35.35
-
linux-image-kvm
-
6.2.0.1015.15
-
linux-image-lowlatency
-
6.2.0.1015.15
-
linux-image-lowlatency-64k
-
6.2.0.1015.15
-
linux-image-oracle
-
6.2.0.1014.14
-
linux-image-raspi
-
6.2.0.1015.18
-
linux-image-raspi-nolpae
-
6.2.0.1015.18
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linux-image-starfive
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6.2.0.1007.10
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linux-image-virtual
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6.2.0.35.35
Ubuntu 22.04
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linux-image-6.2.0-1014-aws
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6.2.0-1014.14~22.04.1
-
linux-image-6.2.0-1015-azure
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6.2.0-1015.15~22.04.1
-
linux-image-6.2.0-1015-azure-fde
-
6.2.0-1015.15~22.04.1.1
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linux-image-6.2.0-1015-lowlatency
-
6.2.0-1015.15~22.04.1
-
linux-image-6.2.0-1015-lowlatency-64k
-
6.2.0-1015.15~22.04.1
-
linux-image-6.2.0-1017-gcp
-
6.2.0-1017.19~22.04.1
-
linux-image-6.2.0-35-generic
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6.2.0-35.35~22.04.1
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linux-image-6.2.0-35-generic-64k
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6.2.0-35.35~22.04.1
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linux-image-6.2.0-35-generic-lpae
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6.2.0-35.35~22.04.1
-
linux-image-aws
-
6.2.0.1014.14~22.04.1
-
linux-image-azure
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6.2.0.1015.15~22.04.1
-
linux-image-azure-fde
-
6.2.0.1015.15~22.04.1.12
-
linux-image-gcp
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6.2.0.1017.19~22.04.1
-
linux-image-generic-64k-hwe-22.04
-
6.2.0.35.35~22.04.13
-
linux-image-generic-hwe-22.04
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6.2.0.35.35~22.04.13
-
linux-image-generic-lpae-hwe-22.04
-
6.2.0.35.35~22.04.13
-
linux-image-lowlatency-64k-hwe-22.04
-
6.2.0.1015.15~22.04.12
-
linux-image-lowlatency-hwe-22.04
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6.2.0.1015.15~22.04.12
-
linux-image-virtual-hwe-22.04
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6.2.0.35.35~22.04.13
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.
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