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==========================================================================
Ubuntu Security Notice USN-7506-1
May 12, 2025
linux, linux-aws, linux-kvm vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 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-kvm: Linux kernel for cloud environments
Details:
Demi Marie Obenour and Simon Gaiser discovered that several Xen para-
virtualization device frontends did not properly restrict the access rights
of device backends. An attacker could possibly use a malicious Xen backend
to gain access to memory pages of a guest VM or cause a denial of service
in the guest. (CVE-2022-23041)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- Hardware crypto device drivers;
- GPU drivers;
- IIO subsystem;
- Media drivers;
- Network drivers;
- SCSI subsystem;
- SPI subsystem;
- USB Gadget drivers;
- Ceph distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NFS) client;
- Network file system (NFS) server daemon;
- NILFS2 file system;
- SMB network file system;
- CAN network layer;
- IPv6 networking;
- MAC80211 subsystem;
- Netfilter;
- Netlink;
- Network traffic control;
- SCTP protocol;
- TIPC protocol;
(CVE-2024-46780, CVE-2021-47163, CVE-2024-46771, CVE-2021-47506,
CVE-2024-36934, CVE-2024-35864, CVE-2024-26915, CVE-2021-47150,
CVE-2024-50256, CVE-2024-53173, CVE-2024-53066, CVE-2024-53063,
CVE-2021-47245, CVE-2024-26996, CVE-2024-56642, CVE-2021-47219,
CVE-2024-56631, CVE-2021-47587, CVE-2021-47191, CVE-2023-52741,
CVE-2021-46959, CVE-2024-26689, CVE-2024-26974, CVE-2024-56770,
CVE-2024-56598, CVE-2024-49944, CVE-2024-50237, CVE-2024-53140,
CVE-2024-56650, CVE-2021-47500, CVE-2025-21971)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.04 LTS
linux-image-4.4.0-1144-kvm 4.4.0-1144.155
Available with Ubuntu Pro
linux-image-4.4.0-1181-aws 4.4.0-1181.196
Available with Ubuntu Pro
linux-image-4.4.0-268-generic 4.4.0-268.302
Available with Ubuntu Pro
linux-image-4.4.0-268-lowlatency 4.4.0-268.302
Available with Ubuntu Pro
linux-image-aws 4.4.0.1181.185
Available with Ubuntu Pro
linux-image-generic 4.4.0.268.274
Available with Ubuntu Pro
linux-image-generic-lts-xenial 4.4.0.268.274
Available with Ubuntu Pro
linux-image-kvm 4.4.0.1144.141
Available with Ubuntu Pro
linux-image-lowlatency 4.4.0.268.274
Available with Ubuntu Pro
linux-image-lowlatency-lts-xenial 4.4.0.268.274
Available with Ubuntu Pro
linux-image-virtual 4.4.0.268.274
Available with Ubuntu Pro
linux-image-virtual-lts-xenial 4.4.0.268.274
Available with Ubuntu Pro
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-7506-1
CVE-2021-46959, CVE-2021-47150, CVE-2021-47163, CVE-2021-47191,
CVE-2021-47219, CVE-2021-47245, CVE-2021-47500, CVE-2021-47506,
CVE-2021-47587, CVE-2022-23041, CVE-2023-52741, CVE-2024-26689,
CVE-2024-26915, CVE-2024-26974, CVE-2024-26996, CVE-2024-35864,
CVE-2024-36934, CVE-2024-46771, CVE-2024-46780, CVE-2024-49944,
CVE-2024-50237, CVE-2024-50256, CVE-2024-53063, CVE-2024-53066,
CVE-2024-53140, CVE-2024-53173, CVE-2024-56598, CVE-2024-56631,
CVE-2024-56642, CVE-2024-56650, CVE-2024-56770, CVE-2025-21971
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