Ubuntu Security Notice 6043-1 - It was discovered that the Traffic-Control Index implementation in the Linux kernel did not properly perform filter deactivation in some situations. A local attacker could possibly use this to gain elevated privileges. Please note that with the fix for thisCVE, kernel support for the TCINDEX classifier has been removed. It was discovered that the OverlayFS implementation in the Linux kernel did not properly handle copy up operation in some conditions. A local attacker could possibly use this to gain elevated privileges.
ec0a1a5229c94426fcf24b22b769c5c1af54a44019b5d5ea9430e2216b19db8f
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Ubuntu Security Notice USN-6043-1
April 26, 2023
linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.19, linux-ibm,
linux-kvm, linux-lowlatency, linux-oracle, linux-raspi vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.10
- Ubuntu 22.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-kvm: Linux kernel for cloud environments
- linux-lowlatency: Linux low latency kernel
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi: Linux kernel for Raspberry Pi systems
- linux-hwe-5.19: Linux hardware enablement (HWE) kernel
Details:
It was discovered that the Traffic-Control Index (TCINDEX) implementation
in the Linux kernel did not properly perform filter deactivation in some
situations. A local attacker could possibly use this to gain elevated
privileges. Please note that with the fix for this CVE, kernel support for
the TCINDEX classifier has been removed. (CVE-2023-1829)
It was discovered that the OverlayFS implementation in the Linux kernel did
not properly handle copy up operation in some conditions. A local attacker
could possibly use this to gain elevated privileges. (CVE-2023-0386)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.10:
linux-image-5.19.0-1017-raspi 5.19.0-1017.24
linux-image-5.19.0-1017-raspi-nolpae 5.19.0-1017.24
linux-image-5.19.0-1021-ibm 5.19.0-1021.23
linux-image-5.19.0-1022-gcp 5.19.0-1022.24
linux-image-5.19.0-1022-kvm 5.19.0-1022.23
linux-image-5.19.0-1022-oracle 5.19.0-1022.25
linux-image-5.19.0-1023-lowlatency 5.19.0-1023.24
linux-image-5.19.0-1023-lowlatency-64k 5.19.0-1023.24
linux-image-5.19.0-1024-aws 5.19.0-1024.25
linux-image-5.19.0-1025-azure 5.19.0-1025.28
linux-image-5.19.0-41-generic 5.19.0-41.42
linux-image-5.19.0-41-generic-64k 5.19.0-41.42
linux-image-5.19.0-41-generic-lpae 5.19.0-41.42
linux-image-aws 5.19.0.1024.21
linux-image-azure 5.19.0.1025.20
linux-image-gcp 5.19.0.1022.18
linux-image-generic 5.19.0.41.37
linux-image-generic-64k 5.19.0.41.37
linux-image-generic-lpae 5.19.0.41.37
linux-image-ibm 5.19.0.1021.18
linux-image-kvm 5.19.0.1022.19
linux-image-lowlatency 5.19.0.1023.19
linux-image-lowlatency-64k 5.19.0.1023.19
linux-image-oracle 5.19.0.1022.18
linux-image-raspi 5.19.0.1017.16
linux-image-raspi-nolpae 5.19.0.1017.16
linux-image-virtual 5.19.0.41.37
Ubuntu 22.04 LTS:
linux-image-5.19.0-41-generic 5.19.0-41.42~22.04.1
linux-image-5.19.0-41-generic-64k 5.19.0-41.42~22.04.1
linux-image-5.19.0-41-generic-lpae 5.19.0-41.42~22.04.1
linux-image-generic-64k-hwe-22.04 5.19.0.41.42~22.04.14
linux-image-generic-hwe-22.04 5.19.0.41.42~22.04.14
linux-image-generic-lpae-hwe-22.04 5.19.0.41.42~22.04.14
linux-image-virtual-hwe-22.04 5.19.0.41.42~22.04.14
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.
References:
https://ubuntu.com/security/notices/USN-6043-1
CVE-2023-0386, CVE-2023-1829
Package Information:
https://launchpad.net/ubuntu/+source/linux/5.19.0-41.42
https://launchpad.net/ubuntu/+source/linux-aws/5.19.0-1024.25
https://launchpad.net/ubuntu/+source/linux-azure/5.19.0-1025.28
https://launchpad.net/ubuntu/+source/linux-gcp/5.19.0-1022.24
https://launchpad.net/ubuntu/+source/linux-ibm/5.19.0-1021.23
https://launchpad.net/ubuntu/+source/linux-kvm/5.19.0-1022.23
https://launchpad.net/ubuntu/+source/linux-lowlatency/5.19.0-1023.24
https://launchpad.net/ubuntu/+source/linux-oracle/5.19.0-1022.25
https://launchpad.net/ubuntu/+source/linux-raspi/5.19.0-1017.24
https://launchpad.net/ubuntu/+source/linux-hwe-5.19/5.19.0-41.42~22.04.1