USN-6316-1: Linux kernel (OEM) vulnerabilities
29 August 2023
Several security issues were fixed in the Linux kernel.
Releases
Packages
- linux-oem-6.1 - Linux kernel for OEM 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)
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
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.
Related notices
- USN-6315-1
- USN-6318-1
- USN-6321-1
- USN-6325-1
- USN-6328-1
- USN-6330-1
- USN-6332-1
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- USN-6317-1
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- USN-6346-1
- USN-6357-1
- USN-6388-1
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- USN-6396-2
- USN-6396-3
- USN-6244-1
- USN-6342-1
- USN-6342-2
- USN-6532-1
- LSN-0098-1
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