==========================================================================
Ubuntu Security Notice USN-6252-1
July 26, 2023

linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15,
linux-dell300x, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm,
linux-oracle, linux-snapdragon vulnerabilities
==========================================================================

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

- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
- Ubuntu 14.04 LTS (Available with Ubuntu Pro)

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-4.15: Linux kernel for Microsoft Azure Cloud systems
- linux-dell300x: Linux kernel for Dell 300x platforms
- linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm: Linux kernel for cloud environments
- linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors
- 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-hwe: Linux hardware enablement (HWE) kernel
- linux-oracle: Linux kernel for Oracle Cloud systems

Details:

It was discovered that the ext4 file system implementation in the Linux
kernel contained a use-after-free vulnerability. An attacker could use this
to construct a malicious ext4 file system image that, when mounted, could
cause a denial of service (system crash). (CVE-2022-1184)

It was discovered that the sound subsystem in the Linux kernel contained a
race condition in some situations. A local attacker could use this to cause
a denial of service (system crash). (CVE-2022-3303)

It was discovered that a race condition existed in the btrfs file system
implementation in the Linux kernel, leading to a use-after-free
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly expose sensitive information. (CVE-2023-1611)

It was discovered that the Xircom PCMCIA network device driver in the Linux
kernel did not properly handle device removal events. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2023-1670)

It was discovered that a race condition existed in the Xen transport layer
implementation for the 9P file system protocol in the Linux kernel, leading
to a use-after-free vulnerability. A local attacker could use this to cause
a denial of service (guest crash) or expose sensitive information (guest
kernel memory). (CVE-2023-1859)

It was discovered that the ST NCI NFC driver did not properly handle device
removal events. A physically proximate attacker could use this to cause a
denial of service (system crash). (CVE-2023-1990)

It was discovered that the XFS file system implementation in the Linux
kernel did not properly perform metadata validation when mounting certain
images. An attacker could use this to specially craft a file system image
that, when mounted, could cause a denial of service (system crash).
(CVE-2023-2124)

It was discovered that the IP-VLAN network driver for the Linux kernel did
not properly initialize memory in some situations, leading to an out-of-
bounds write vulnerability. An attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2023-3090)

It was discovered that the btrfs file system implementation in the Linux
kernel did not properly handle error conditions in some situations, leading
to a use-after-free vulnerability. A local attacker could possibly use this
to cause a denial of service (system crash). (CVE-2023-3111)

It was discovered that the Ricoh R5C592 MemoryStick card reader driver in
the Linux kernel contained a race condition during module unload, leading
to a use-after-free vulnerability. A local attacker could use this to cause
a denial of service (system crash) or possibly execute arbitrary code.
(CVE-2023-3141)

It was discovered that the kernel->user space relay implementation in the
Linux kernel did not properly perform certain buffer calculations, leading
to an out-of-bounds read vulnerability. A local attacker could use this to
cause a denial of service (system crash) or expose sensitive information
(kernel memory). (CVE-2023-3268)

It was discovered that the netfilter subsystem in the Linux kernel did not
properly handle some error conditions, leading to a use-after-free
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-3390)

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 18.04 LTS (Available with Ubuntu Pro):
   linux-image-4.15.0-1068-dell300x  4.15.0-1068.73
   linux-image-4.15.0-1143-kvm     4.15.0-1143.148
   linux-image-4.15.0-1153-gcp     4.15.0-1153.170
   linux-image-4.15.0-1153-snapdragon  4.15.0-1153.163
   linux-image-4.15.0-1159-aws     4.15.0-1159.172
   linux-image-4.15.0-1168-azure   4.15.0-1168.183
   linux-image-4.15.0-214-generic  4.15.0-214.225
   linux-image-4.15.0-214-generic-lpae  4.15.0-214.225
   linux-image-4.15.0-214-lowlatency  4.15.0-214.225
   linux-image-aws-lts-18.04       4.15.0.1159.157
   linux-image-azure-lts-18.04     4.15.0.1168.136
   linux-image-dell300x            4.15.0.1068.67
   linux-image-gcp-lts-18.04       4.15.0.1153.167
   linux-image-generic             4.15.0.214.197
   linux-image-generic-lpae        4.15.0.214.197
   linux-image-kvm                 4.15.0.1143.134
   linux-image-lowlatency          4.15.0.214.197
   linux-image-snapdragon          4.15.0.1153.152
   linux-image-virtual             4.15.0.214.197

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   linux-image-4.15.0-1122-oracle  4.15.0-1122.133~16.04.1
   linux-image-4.15.0-1153-gcp     4.15.0-1153.170~16.04.1
   linux-image-4.15.0-1159-aws     4.15.0-1159.172~16.04.1
   linux-image-4.15.0-1168-azure   4.15.0-1168.183~16.04.1
   linux-image-4.15.0-214-generic  4.15.0-214.225~16.04.1
   linux-image-4.15.0-214-lowlatency  4.15.0-214.225~16.04.1
   linux-image-aws-hwe             4.15.0.1159.142
   linux-image-azure               4.15.0.1168.152
   linux-image-gcp                 4.15.0.1153.143
   linux-image-generic-hwe-16.04   4.15.0.214.199
   linux-image-gke                 4.15.0.1153.143
   linux-image-lowlatency-hwe-16.04  4.15.0.214.199
   linux-image-oem                 4.15.0.214.199
   linux-image-oracle              4.15.0.1122.103
   linux-image-virtual-hwe-16.04   4.15.0.214.199

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
   linux-image-4.15.0-1168-azure   4.15.0-1168.183~14.04.1
   linux-image-azure               4.15.0.1168.134

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-6252-1
   CVE-2022-1184, CVE-2022-3303, CVE-2023-1611, CVE-2023-1670,
   CVE-2023-1859, CVE-2023-1990, CVE-2023-2124, CVE-2023-3090,
   CVE-2023-3111, CVE-2023-3141, CVE-2023-3268, CVE-2023-3390,
   CVE-2023-35001