==========================================================================
\nUbuntu Security Notice USN-5565-1
\nAugust 10, 2022<\/p>\n
linux, linux-hwe-5.15, linux-lowlatency, linux-lowlatency-hwe-5.15
\nvulnerabilities
\n==========================================================================<\/p>\n
A security issue affects these releases of Ubuntu and its derivatives:<\/p>\n
– Ubuntu 22.04 LTS
\n– Ubuntu 20.04 LTS<\/p>\n
Summary:<\/p>\n
Several security issues were fixed in the Linux kernel.<\/p>\n
Software Description:
\n– linux: Linux kernel
\n– linux-lowlatency: Linux low latency kernel
\n– linux-hwe-5.15: Linux hardware enablement (HWE) kernel
\n– linux-lowlatency-hwe-5.15: Linux low latency kernel<\/p>\n
Details:<\/p>\n
Zhenpeng Lin discovered that the network packet scheduler implementation in
\nthe Linux kernel did not properly remove all references to a route filter
\nbefore freeing it in some situations. A local attacker could use this to
\ncause a denial of service (system crash) or execute arbitrary code.
\n(CVE-2022-2588)<\/p>\n
It was discovered that the netfilter subsystem of the Linux kernel did not
\nprevent one nft object from referencing an nft set in another nft table,
\nleading to a use-after-free vulnerability. A local attacker could use this
\nto cause a denial of service (system crash) or execute arbitrary code.
\n(CVE-2022-2586)<\/p>\n
It was discovered that the implementation of POSIX timers in the Linux
\nkernel did not properly clean up timers in some situations. A local
\nattacker could use this to cause a denial of service (system crash) or
\nexecute arbitrary code. (CVE-2022-2585)<\/p>\n
Johannes Wikner and Kaveh Razavi discovered that for some AMD x86-64
\nprocessors, the branch predictor could by mis-trained for return
\ninstructions in certain circumstances. A local attacker could possibly use
\nthis to expose sensitive information. (CVE-2022-29900)<\/p>\n
Johannes Wikner and Kaveh Razavi discovered that for some Intel x86-64
\nprocessors, the Linux kernel’s protections against speculative branch
\ntarget injection attacks were insufficient in some circumstances. A local
\nattacker could possibly use this to expose sensitive information.
\n(CVE-2022-29901)<\/p>\n
Update instructions:<\/p>\n
The problem can be corrected by updating your system to the following
\npackage versions:<\/p>\n
Ubuntu 22.04 LTS:
\nlinux-image-5.15.0-46-generic 5.15.0-46.49
\nlinux-image-5.15.0-46-generic-64k 5.15.0-46.49
\nlinux-image-5.15.0-46-generic-lpae 5.15.0-46.49
\nlinux-image-5.15.0-46-lowlatency 5.15.0-46.49
\nlinux-image-5.15.0-46-lowlatency-64k 5.15.0-46.49
\nlinux-image-generic 5.15.0.46.46
\nlinux-image-generic-64k 5.15.0.46.46
\nlinux-image-generic-64k-hwe-22.04 5.15.0.46.46
\nlinux-image-generic-hwe-22.04 5.15.0.46.46
\nlinux-image-generic-lpae 5.15.0.46.46
\nlinux-image-generic-lpae-hwe-22.04 5.15.0.46.46
\nlinux-image-lowlatency 5.15.0.46.43
\nlinux-image-lowlatency-64k 5.15.0.46.43
\nlinux-image-lowlatency-64k-hwe-22.04 5.15.0.46.43
\nlinux-image-lowlatency-hwe-22.04 5.15.0.46.43
\nlinux-image-virtual 5.15.0.46.46
\nlinux-image-virtual-hwe-22.04 5.15.0.46.46<\/p>\n
Ubuntu 20.04 LTS:
\nlinux-image-5.15.0-46-generic 5.15.0-46.49~20.04.1
\nlinux-image-5.15.0-46-generic-64k 5.15.0-46.49~20.04.1
\nlinux-image-5.15.0-46-generic-lpae 5.15.0-46.49~20.04.1
\nlinux-image-5.15.0-46-lowlatency 5.15.0-46.49~20.04.1
\nlinux-image-5.15.0-46-lowlatency-64k 5.15.0-46.49~20.04.1
\nlinux-image-generic-64k-hwe-20.04 5.15.0.46.49~20.04.16
\nlinux-image-generic-hwe-20.04 5.15.0.46.49~20.04.16
\nlinux-image-generic-lpae-hwe-20.04 5.15.0.46.49~20.04.16
\nlinux-image-lowlatency-64k-hwe-20.04 5.15.0.46.49~20.04.15
\nlinux-image-lowlatency-hwe-20.04 5.15.0.46.49~20.04.15
\nlinux-image-virtual-hwe-20.04 5.15.0.46.49~20.04.16<\/p>\n
After a standard system update you need to reboot your computer to make
\nall the necessary changes.<\/p>\n
ATTENTION: Due to an unavoidable ABI change the kernel updates have
\nbeen given a new version number, which requires you to recompile and
\nreinstall all third party kernel modules you might have installed.
\nUnless you manually uninstalled the standard kernel metapackages
\n(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
\nlinux-powerpc), a standard system upgrade will automatically perform
\nthis as well.<\/p>\n
References:
\nhttps:\/\/ubuntu.com\/security\/notices\/USN-5565-1
\nCVE-2022-2585, CVE-2022-2586, CVE-2022-2588, CVE-2022-29900,
\nCVE-2022-29901<\/p>\n
Package Information:
\nhttps:\/\/launchpad.net\/ubuntu\/+source\/linux\/5.15.0-46.49
\nhttps:\/\/launchpad.net\/ubuntu\/+source\/linux-lowlatency\/5.15.0-46.49
\nhttps:\/\/launchpad.net\/ubuntu\/+source\/linux-hwe-5.15\/5.15.0-46.49~20.04.1<\/p>\n
https:\/\/launchpad.net\/ubuntu\/+source\/linux-lowlatency-hwe-5.15\/5.15.0-46.49~20.04.1<\/p>\n","protected":false},"excerpt":{"rendered":"
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