USN-4302-1: Linux kernel vulnerabilities
25 March 2020
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-aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems
- linux-azure - Linux kernel for Microsoft Azure Cloud systems
- linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke-4.15 - Linux kernel for Google Container Engine (GKE) systems
- linux-hwe - Linux hardware enablement (HWE) kernel
- linux-kvm - Linux kernel for cloud environments
- linux-oem - Linux kernel for OEM processors
- linux-oracle - Linux kernel for Oracle Cloud systems
- linux-raspi2 - Linux kernel for Raspberry Pi 2
- linux-snapdragon - Linux kernel for Snapdragon processors
Details
Paulo Bonzini discovered that the KVM hypervisor implementation in the
Linux kernel could improperly let a nested (level 2) guest access the
resources of a parent (level 1) guest in certain situations. An attacker
could use this to expose sensitive information. (CVE-2020-2732)
Gregory Herrero discovered that the fix for CVE-2019-14615 to address the
Linux kernel not properly clearing data structures on context switches for
certain Intel graphics processors was incomplete. A local attacker could
use this to expose sensitive information. (CVE-2020-8832)
It was discovered that the IPMI message handler implementation in the Linux
kernel did not properly deallocate memory in certain situations. A local
attacker could use this to cause a denial of service (kernel memory
exhaustion). (CVE-2019-19046)
It was discovered that the Intel WiMAX 2400 driver in the Linux kernel did
not properly deallocate memory in certain situations. A local attacker
could use this to cause a denial of service (kernel memory exhaustion).
(CVE-2019-19051)
It was discovered that the Marvell Wi-Fi device driver in the Linux kernel
did not properly deallocate memory in certain error conditions. A local
attacker could use this to possibly cause a denial of service (kernel
memory exhaustion). (CVE-2019-19056)
It was discovered that the Intel(R) Wi-Fi device driver in the Linux kernel
device driver in the Linux kernel did not properly deallocate memory in
certain error conditions. A local attacker could possibly use this to cause
a denial of service (kernel memory exhaustion). (CVE-2019-19058)
It was discovered that the Brocade BFA Fibre Channel device driver in the
Linux kernel did not properly deallocate memory in certain error
conditions. A local attacker could possibly use this to cause a denial of
service (kernel memory exhaustion). (CVE-2019-19066)
It was discovered that the Realtek RTL8xxx USB Wi-Fi device driver in the
Linux kernel did not properly deallocate memory in certain error
conditions. A local attacker could possibly use this to cause a denial of
service (kernel memory exhaustion). (CVE-2019-19068)
It was discovered that ZR364XX Camera USB device driver for the Linux
kernel did not properly initialize memory. A physically proximate attacker
could use this to cause a denial of service (system crash).
(CVE-2019-15217)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04
-
linux-image-4.15.0-1035-oracle
-
4.15.0-1035.39
-
linux-image-4.15.0-1055-gke
-
4.15.0-1055.58
-
linux-image-4.15.0-1056-kvm
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4.15.0-1056.57
-
linux-image-4.15.0-1057-raspi2
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4.15.0-1057.61
-
linux-image-4.15.0-1063-aws
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4.15.0-1063.67
-
linux-image-4.15.0-1074-snapdragon
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4.15.0-1074.81
-
linux-image-4.15.0-1076-oem
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4.15.0-1076.86
-
linux-image-4.15.0-91-generic
-
4.15.0-91.92
-
linux-image-4.15.0-91-generic-lpae
-
4.15.0-91.92
-
linux-image-4.15.0-91-lowlatency
-
4.15.0-91.92
-
linux-image-aws
-
4.15.0.1063.64
-
linux-image-aws-lts-18.04
-
4.15.0.1063.64
-
linux-image-generic
-
4.15.0.91.83
-
linux-image-generic-lpae
-
4.15.0.91.83
-
linux-image-gke
-
4.15.0.1055.59
-
linux-image-gke-4.15
-
4.15.0.1055.59
-
linux-image-kvm
-
4.15.0.1056.56
-
linux-image-lowlatency
-
4.15.0.91.83
-
linux-image-oem
-
4.15.0.1076.80
-
linux-image-oracle-lts-18.04
-
4.15.0.1035.43
-
linux-image-raspi2
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4.15.0.1057.55
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linux-image-snapdragon
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4.15.0.1074.77
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linux-image-virtual
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4.15.0.91.83
Ubuntu 16.04
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linux-image-4.15.0-1035-oracle
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4.15.0-1035.38~16.04.1
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linux-image-4.15.0-1058-gcp
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4.15.0-1058.62
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linux-image-4.15.0-1063-aws
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4.15.0-1063.67~16.04.1
-
linux-image-4.15.0-1075-azure
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4.15.0-1075.80
-
linux-image-4.15.0-91-generic
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4.15.0-91.92~16.04.1
-
linux-image-4.15.0-91-generic-lpae
-
4.15.0-91.92~16.04.1
-
linux-image-4.15.0-91-lowlatency
-
4.15.0-91.92~16.04.1
-
linux-image-aws-hwe
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4.15.0.1063.63
-
linux-image-azure
-
4.15.0.1075.78
-
linux-image-gcp
-
4.15.0.1058.72
-
linux-image-generic-hwe-16.04
-
4.15.0.91.101
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linux-image-generic-lpae-hwe-16.04
-
4.15.0.91.101
-
linux-image-gke
-
4.15.0.1058.72
-
linux-image-lowlatency-hwe-16.04
-
4.15.0.91.101
-
linux-image-oem
-
4.15.0.91.101
-
linux-image-oracle
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4.15.0.1035.28
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linux-image-virtual-hwe-16.04
-
4.15.0.91.101
Ubuntu 14.04
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.