USN-4253-1: Linux kernel vulnerability
28 January 2020
The Linux kernel could be made to expose sensitive information.
Releases
Packages
Details
It was discovered that the Linux kernel did not properly clear data
structures on context switches for certain Intel graphics processors. A
local attacker could use this to expose sensitive information.
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 19.10
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linux-image-5.3.0-1010-aws
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5.3.0-1010.11
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linux-image-5.3.0-29-generic
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5.3.0-29.31
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linux-image-generic
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5.3.0.29.33
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linux-image-5.3.0-29-snapdragon
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5.3.0-29.31
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linux-image-5.3.0-29-lowlatency
-
5.3.0-29.31
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linux-image-virtual
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5.3.0.29.33
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linux-image-generic-lpae
-
5.3.0.29.33
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linux-image-aws
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5.3.0.1010.12
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linux-image-lowlatency
-
5.3.0.29.33
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linux-image-5.3.0-29-generic-lpae
-
5.3.0-29.31
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.