USN-4135-2: Linux kernel vulnerabilities
18 September 2019
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-azure - Linux kernel for Microsoft Azure Cloud systems
- linux-lts-trusty - Linux hardware enablement kernel from Trusty for Precise ESM
- linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty
Details
Peter Pi discovered a buffer overflow in the virtio network backend
(vhost_net) implementation in the Linux kernel. An attacker in a guest may
be able to use this to cause a denial of service (host OS crash) or
possibly execute arbitrary code in the host OS. (CVE-2019-14835)
It was discovered that the Linux kernel on PowerPC architectures did not
properly handle Facility Unavailable exceptions in some situations. A local
attacker could use this to expose sensitive information. (CVE-2019-15030)
It was discovered that the Linux kernel on PowerPC architectures did not
properly handle exceptions on interrupts in some situations. A local
attacker could use this to expose sensitive information. (CVE-2019-15031)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 14.04
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linux-image-server
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3.13.0.173.184
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linux-image-virtual-lts-xenial
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4.4.0.164.143
-
linux-image-powerpc-e500mc
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3.13.0.173.184
-
linux-image-generic-lts-xenial
-
4.4.0.164.143
-
linux-image-4.4.0-164-lowlatency
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4.4.0-164.192~14.04.1
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linux-image-4.4.0-164-powerpc64-emb
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4.4.0-164.192~14.04.1
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linux-image-4.4.0-164-powerpc-smp
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4.4.0-164.192~14.04.1
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linux-image-3.13.0-173-generic
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3.13.0-173.224
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linux-image-azure
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4.15.0.1059.45
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linux-image-4.4.0-164-generic-lpae
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4.4.0-164.192~14.04.1
-
linux-image-3.13.0-173-powerpc-smp
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3.13.0-173.224
-
linux-image-generic-lpae-lts-xenial
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4.4.0.164.143
-
linux-image-powerpc-e500mc-lts-xenial
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4.4.0.164.143
-
linux-image-4.4.0-1054-aws
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4.4.0-1054.58
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linux-image-virtual
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3.13.0.173.184
-
linux-image-powerpc-e500
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3.13.0.173.184
-
linux-image-powerpc64-smp-lts-xenial
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4.4.0.164.143
-
linux-image-4.4.0-164-powerpc-e500mc
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4.4.0-164.192~14.04.1
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linux-image-powerpc-smp-lts-xenial
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4.4.0.164.143
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linux-image-3.13.0-173-powerpc-e500
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3.13.0-173.224
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linux-image-powerpc-smp
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3.13.0.173.184
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linux-image-generic
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3.13.0.173.184
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linux-image-lowlatency-lts-xenial
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4.4.0.164.143
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linux-image-4.4.0-164-powerpc64-smp
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4.4.0-164.192~14.04.1
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linux-image-4.15.0-1059-azure
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4.15.0-1059.64~14.04.1
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linux-image-aws
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4.4.0.1054.55
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linux-image-3.13.0-173-powerpc-e500mc
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3.13.0-173.224
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linux-image-generic-lpae
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3.13.0.173.184
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linux-image-4.4.0-164-generic
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4.4.0-164.192~14.04.1
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linux-image-powerpc64-emb
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3.13.0.173.184
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linux-image-powerpc64-emb-lts-xenial
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4.4.0.164.143
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linux-image-3.13.0-173-powerpc64-emb
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3.13.0-173.224
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linux-image-powerpc64-smp
-
3.13.0.173.184
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linux-image-3.13.0-173-lowlatency
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3.13.0-173.224
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linux-image-3.13.0-173-powerpc64-smp
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3.13.0-173.224
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linux-image-lowlatency
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3.13.0.173.184
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linux-image-3.13.0-173-generic-lpae
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3.13.0-173.224
Ubuntu 12.04
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linux-image-server
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3.2.0.143.158
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linux-image-powerpc-smp
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3.2.0.143.158
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linux-image-generic-lts-trusty
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3.13.0.173.161
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linux-image-3.2.0-143-virtual
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3.2.0-143.190
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linux-image-powerpc
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3.2.0.143.158
-
linux-image-generic
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3.2.0.143.158
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linux-image-3.2.0-143-generic
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3.2.0-143.190
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linux-image-generic-lpae-lts-trusty
-
3.13.0.173.161
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linux-image-highbank
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3.2.0.143.158
-
linux-image-3.2.0-143-powerpc-smp
-
3.2.0-143.190
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linux-image-3.2.0-143-highbank
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3.2.0-143.190
-
linux-image-virtual
-
3.2.0.143.158
-
linux-image-3.2.0-143-powerpc64-smp
-
3.2.0-143.190
-
linux-image-powerpc64-smp
-
3.2.0.143.158
-
linux-image-3.13.0-173-lowlatency
-
3.13.0-173.224~12.04.1
-
linux-image-3.13.0-173-generic
-
3.13.0-173.224~12.04.1
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linux-image-3.2.0-143-generic-pae
-
3.2.0-143.190
-
linux-image-omap
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3.2.0.143.158
-
linux-image-generic-pae
-
3.2.0.143.158
-
linux-image-3.13.0-173-generic-lpae
-
3.13.0-173.224~12.04.1
-
linux-image-3.2.0-143-omap
-
3.2.0-143.190
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.