USN-6315-1: Linux kernel vulnerabilities
29 August 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-5.15 - Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke - Linux kernel for Google Container Engine (GKE) systems
- linux-gkeop - Linux kernel for Google Container Engine (GKE) systems
- linux-hwe-5.15 - Linux hardware enablement (HWE) kernel
- linux-ibm - Linux kernel for IBM cloud systems
- linux-kvm - Linux kernel for cloud environments
- linux-lowlatency - Linux low latency kernel
- linux-lowlatency-hwe-5.15 - Linux low latency kernel
- linux-nvidia - Linux kernel for NVIDIA systems
- linux-oracle - Linux kernel for Oracle Cloud systems
- linux-oracle-5.15 - Linux kernel for Oracle Cloud systems
Details
Daniel Moghimi discovered that some Intel(R) Processors did not properly
clear microarchitectural state after speculative execution of various
instructions. A local unprivileged user could use this to obtain to
sensitive information. (CVE-2022-40982)
Tavis Ormandy discovered that some AMD processors did not properly handle
speculative execution of certain vector register instructions. A local
attacker could use this to expose sensitive information. (CVE-2023-20593)
Ye Zhang and Nicolas Wu discovered that the io_uring subsystem in the Linux
kernel did not properly handle locking for rings with IOPOLL, leading to a
double-free vulnerability. A local attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2023-21400)
It was discovered that the universal 32bit network packet classifier
implementation in the Linux kernel did not properly perform reference
counting in some 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-2023-3609)
It was discovered that the netfilter subsystem in the Linux kernel did not
properly handle certain error 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-2023-3610)
It was discovered that the Quick Fair Queueing network scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-3611)
It was discovered that the network packet classifier with
netfilter/firewall marks implementation in the Linux kernel did not
properly handle reference counting, 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-2023-3776)
Kevin Rich discovered that the netfilter subsystem in the Linux kernel did
not properly handle table rules flush in certain circumstances. A local
attacker could possibly use this to cause a denial of service (system
crash) or execute arbitrary code. (CVE-2023-3777)
Kevin Rich discovered that the netfilter subsystem in the Linux kernel did
not properly handle rule additions to bound chains in certain
circumstances. A local attacker could possibly use this to cause a denial
of service (system crash) or execute arbitrary code. (CVE-2023-3995)
It was discovered that the netfilter subsystem in the Linux kernel did not
properly handle PIPAPO element removal, 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-2023-4004)
Kevin Rich discovered that the netfilter subsystem in the Linux kernel did
not properly handle bound chain deactivation in certain circumstances. A
local attacker could possibly use this to cause a denial of service (system
crash) or execute arbitrary code. (CVE-2023-4015)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 22.04
-
linux-image-5.15.0-1026-gkeop
-
5.15.0-1026.31
-
linux-image-5.15.0-1031-nvidia
-
5.15.0-1031.31
-
linux-image-5.15.0-1031-nvidia-lowlatency
-
5.15.0-1031.31
-
linux-image-5.15.0-1036-ibm
-
5.15.0-1036.39
-
linux-image-5.15.0-1040-gcp
-
5.15.0-1040.48
-
linux-image-5.15.0-1040-gke
-
5.15.0-1040.45
-
linux-image-5.15.0-1040-kvm
-
5.15.0-1040.45
-
linux-image-5.15.0-1041-oracle
-
5.15.0-1041.47
-
linux-image-5.15.0-1043-aws
-
5.15.0-1043.48
-
linux-image-5.15.0-82-generic
-
5.15.0-82.91
-
linux-image-5.15.0-82-generic-64k
-
5.15.0-82.91
-
linux-image-5.15.0-82-generic-lpae
-
5.15.0-82.91
-
linux-image-5.15.0-82-lowlatency
-
5.15.0-82.91
-
linux-image-5.15.0-82-lowlatency-64k
-
5.15.0-82.91
-
linux-image-aws-lts-22.04
-
5.15.0.1043.42
-
linux-image-gcp-lts-22.04
-
5.15.0.1040.36
-
linux-image-generic
-
5.15.0.82.78
-
linux-image-generic-64k
-
5.15.0.82.78
-
linux-image-generic-lpae
-
5.15.0.82.78
-
linux-image-gke
-
5.15.0.1040.39
-
linux-image-gke-5.15
-
5.15.0.1040.39
-
linux-image-gkeop
-
5.15.0.1026.25
-
linux-image-gkeop-5.15
-
5.15.0.1026.25
-
linux-image-ibm
-
5.15.0.1036.32
-
linux-image-kvm
-
5.15.0.1040.36
-
linux-image-lowlatency
-
5.15.0.82.84
-
linux-image-lowlatency-64k
-
5.15.0.82.84
-
linux-image-nvidia
-
5.15.0.1031.31
-
linux-image-nvidia-lowlatency
-
5.15.0.1031.31
-
linux-image-oracle-lts-22.04
-
5.15.0.1041.36
-
linux-image-virtual
-
5.15.0.82.78
Ubuntu 20.04
-
linux-image-5.15.0-1041-oracle
-
5.15.0-1041.47~20.04.1
-
linux-image-5.15.0-1043-aws
-
5.15.0-1043.48~20.04.1
-
linux-image-5.15.0-82-generic
-
5.15.0-82.91~20.04.1
-
linux-image-5.15.0-82-generic-64k
-
5.15.0-82.91~20.04.1
-
linux-image-5.15.0-82-generic-lpae
-
5.15.0-82.91~20.04.1
-
linux-image-5.15.0-82-lowlatency
-
5.15.0-82.91~20.04.1
-
linux-image-5.15.0-82-lowlatency-64k
-
5.15.0-82.91~20.04.1
-
linux-image-aws
-
5.15.0.1043.48~20.04.31
-
linux-image-generic-64k-hwe-20.04
-
5.15.0.82.91~20.04.40
-
linux-image-generic-hwe-20.04
-
5.15.0.82.91~20.04.40
-
linux-image-generic-lpae-hwe-20.04
-
5.15.0.82.91~20.04.40
-
linux-image-lowlatency-64k-hwe-20.04
-
5.15.0.82.91~20.04.37
-
linux-image-lowlatency-hwe-20.04
-
5.15.0.82.91~20.04.37
-
linux-image-oem-20.04
-
5.15.0.82.91~20.04.40
-
linux-image-oem-20.04b
-
5.15.0.82.91~20.04.40
-
linux-image-oem-20.04c
-
5.15.0.82.91~20.04.40
-
linux-image-oem-20.04d
-
5.15.0.82.91~20.04.40
-
linux-image-oracle
-
5.15.0.1041.47~20.04.1
-
linux-image-virtual-hwe-20.04
-
5.15.0.82.91~20.04.40
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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