[LSN-0105-1] Linux kernel vulnerability

[benjamin.romer at canonical.com]

Linux kernel vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

-   Ubuntu 20.04 LTS
-   Ubuntu 18.04 LTS
-   Ubuntu 16.04 ESM
-   Ubuntu 22.04 LTS
-   Ubuntu 14.04 ESM

Summary

Several security issues were fixed in the 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-gke - Linux kernel for Google Container Engine (GKE) systems
-   linux-gkeop - Linux kernel for Google Container Engine (GKE) systems
-   linux-ibm - Linux kernel for IBM cloud systems
-   linux-oracle - Linux kernel for Oracle Cloud systems

Details

It was discovered that the ATA over Ethernet (AoE) driver in the Linux
kernel contained a race condition, leading to a use-after-free
vulnerability. An attacker could use this to cause a denial of service
or possibly execute arbitrary code. (CVE-2023-6270)

It was discovered that the netfilter connection tracker for netlink in
the Linux kernel did not properly perform reference counting in some
error conditions. A local attacker could possibly use this to cause a
denial of service (memory exhaustion). (CVE-2023-7192)

In the Linux kernel, the following vulnerability has been
resolved: netfilter: nf_tables: disallow anonymous set with timeout flag
Anonymous sets are never used with timeout from userspace, reject this.
Exception to this rule is NFT_SET_EVAL to ensure legacy meters still
work. (CVE-2024-26642)

In the Linux kernel, the following vulnerability has been
resolved: cifs: fix underflow in parse_server_interfaces() (CVE-2024-26828)

In the Linux kernel, the following vulnerability has been
resolved: netfilter: nft_set_pipapo: do not free live element.
(CVE-2024-26924)

Update instructions

The problem can be corrected by updating your kernel livepatch to the
following versions:

Ubuntu 20.04 LTS
    aws - 105.1
    azure - 105.1
    gcp - 105.1
    generic - 105.1
    gke - 105.1
    gkeop - 105.1
    ibm - 105.1
    lowlatency - 105.1
    oracle - 105.1

Ubuntu 18.04 LTS
    aws - 105.1
    azure - 105.1
    gcp - 105.1
    generic - 105.1
    lowlatency - 105.1
    oracle - 105.1

Ubuntu 16.04 ESM
    aws - 105.1
    azure - 105.1
    gcp - 105.1
    generic - 105.1
    lowlatency - 105.1

Ubuntu 22.04 LTS
    aws - 105.1
    gcp - 105.1
    generic - 105.1
    generic - 105.2
    gke - 105.1
    ibm - 105.1
    oracle - 105.1

Ubuntu 14.04 ESM
    generic - 105.1
    lowlatency - 105.1

Support Information

Livepatches for supported LTS kernels will receive upgrades for a period
of up to 13 months after the build date of the kernel.

Livepatches for supported HWE kernels which are not based on an LTS
kernel version will receive upgrades for a period of up to 9 months
after the build date of the kernel, or until the end of support for that
kernel’s non-LTS distro release version, whichever is sooner.

References

-   CVE-2023-6270
-   CVE-2023-7192
-   CVE-2024-26642
-   CVE-2024-26828
-   CVE-2024-26924