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A Linux kernel (OEM) security update has been released for Ubuntu Linux 22.04 LTS.



[USN-6247-1] Linux kernel (OEM) vulnerabilities


==========================================================================
Ubuntu Security Notice USN-6247-1
July 25, 2023

linux-oem-5.17 vulnerabilities
==========================================================================

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

- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-oem-5.17: Linux kernel for OEM systems

Details:

David Leadbeater discovered that the netfilter IRC protocol tracking
implementation in the Linux Kernel incorrectly handled certain message
payloads in some situations. A remote attacker could possibly use this to
cause a denial of service or bypass firewall filtering. (CVE-2022-2663)

It was discovered that the IDT 77252 ATM PCI device driver in the Linux
kernel did not properly remove any pending timers during device exit,
resulting in a use-after-free vulnerability. A local attacker could
possibly use this to cause a denial of service (system crash) or execute
arbitrary code. (CVE-2022-3635)

It was discovered that the network queuing discipline implementation in the
Linux kernel contained a null pointer dereference in some situations. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2022-47929)

Lucas Leong discovered that the IPv6 SR implementation in the Linux kernel
did not properly validate SEG6 configuration attributes, leading to an out-
of-bounds read vulnerability. A privileged attacker could use this to
expose sensitive information (kernel memory). (CVE-2023-2860)

Mingi Cho discovered that the netfilter subsystem in the Linux kernel did
not properly validate the status of a nft chain while performing a lookup
by id, leading to a use-after-free vulnerability. An attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2023-31248)

Tanguy Dubroca discovered that the netfilter subsystem in the Linux kernel
did not properly handle certain pointer data type, leading to an out-of-
bounds write vulnerability. A privileged attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2023-35001)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS:
linux-image-5.17.0-1035-oem 5.17.0-1035.36
linux-image-oem-22.04 5.17.0.1035.33
linux-image-oem-22.04a 5.17.0.1035.33

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-6247-1
CVE-2022-2663, CVE-2022-3635, CVE-2022-47929, CVE-2023-2860,
CVE-2023-31248, CVE-2023-35001

Package Information:
https://launchpad.net/ubuntu/+source/linux-oem-5.17/5.17.0-1035.36