USN-5802-1: Linux kernel vulnerabilities
12 January 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-kvm - Linux kernel for cloud environments
- linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty
Details
It was discovered that the NFSD implementation in the Linux kernel did not
properly handle some RPC messages, leading to a buffer overflow. A remote
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2022-43945)
Tamás Koczka discovered that the Bluetooth L2CAP handshake implementation
in the Linux kernel contained multiple use-after-free vulnerabilities. A
physically proximate attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2022-42896)
It was discovered that the Xen netback driver in the Linux kernel did not
properly handle packets structured in certain ways. An attacker in a guest
VM could possibly use this to cause a denial of service (host NIC
availability). (CVE-2022-3643)
It was discovered that an integer overflow vulnerability existed in the
Bluetooth subsystem in the Linux kernel. A physically proximate attacker
could use this to cause a denial of service (system crash).
(CVE-2022-45934)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04
-
linux-image-4.4.0-236-generic
-
4.4.0-236.270
Available with Ubuntu Pro
-
linux-image-generic
-
4.4.0.236.242
Available with Ubuntu Pro
-
linux-image-lowlatency-lts-xenial
-
4.4.0.236.242
Available with Ubuntu Pro
-
linux-image-virtual-lts-xenial
-
4.4.0.236.242
Available with Ubuntu Pro
-
linux-image-virtual
-
4.4.0.236.242
Available with Ubuntu Pro
-
linux-image-generic-lts-xenial
-
4.4.0.236.242
Available with Ubuntu Pro
-
linux-image-kvm
-
4.4.0.1116.113
Available with Ubuntu Pro
-
linux-image-4.4.0-1116-kvm
-
4.4.0-1116.126
Available with Ubuntu Pro
-
linux-image-4.4.0-236-lowlatency
-
4.4.0-236.270
Available with Ubuntu Pro
-
linux-image-lowlatency
-
4.4.0.236.242
Available with Ubuntu Pro
Ubuntu 14.04
-
linux-image-4.4.0-236-generic
-
4.4.0-236.270~14.04.1
Available with Ubuntu Pro
-
linux-image-generic-lts-xenial
-
4.4.0.236.205
Available with Ubuntu Pro
-
linux-image-lowlatency-lts-xenial
-
4.4.0.236.205
Available with Ubuntu Pro
-
linux-image-aws
-
4.4.0.1115.112
Available with Ubuntu Pro
-
linux-image-4.4.0-1115-aws
-
4.4.0-1115.121
Available with Ubuntu Pro
-
linux-image-4.4.0-236-lowlatency
-
4.4.0-236.270~14.04.1
Available with Ubuntu Pro
-
linux-image-virtual-lts-xenial
-
4.4.0.236.205
Available with Ubuntu Pro
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
Related notices
- USN-5780-1
- USN-5783-1
- USN-5794-1
- USN-5803-1
- USN-5804-1
- USN-5804-2
- USN-5808-1
- USN-5809-1
- USN-5813-1
- USN-5814-1
- USN-5829-1
- USN-5830-1
- USN-5831-1
- USN-5832-1
- USN-5860-1
- USN-5861-1
- USN-5863-1
- USN-5875-1
- USN-5877-1
- USN-5879-1
- USN-5914-1
- USN-5918-1
- LSN-0092-1
- USN-5858-1
- LSN-0099-1
- USN-5754-1
- USN-5755-1
- USN-5755-2
- USN-5754-2
- USN-5773-1
- USN-5779-1
- USN-5789-1