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Ubuntu 20.04 LTS: USN-7585-1 critical: Linux kernel security flaws

ubuntu
Calendar Grey June 19, 2025
Dist Ubuntu Esm H88
Essential security patches for the Ubuntu kernel tackle various weaknesses, improving both system security and reliability.
Several security issues were fixed in the Linux kernel.

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-oracle: Linux kernel for Oracle Cloud systems

- linux-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors

- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems

- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems

- linux-ibm-5.4: Linux kernel for IBM cloud systems

- linux-oracle-5.4: Linux kernel for Oracle Cloud systems

Details:

It was discovered that the CIFS network file system implementation in the

Linux kernel did not properly verify the target namespace when handling

upcalls. An attacker could use this to expose sensitive infor...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory critical ubuntu linux kernel system exploit cifs issue

Update Instructions

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

Ubuntu 20.04 LTS
   linux-image-5.4.0-1065-xilinx-zynqmp  5.4.0-1065.69
                                   Available with Ubuntu Pro
   linux-image-5.4.0-1093-ibm      5.4.0-1093.98
                                   Available with Ubuntu Pro
   linux-image-5.4.0-1134-kvm      5.4.0-1134.143
                                   Available with Ubuntu Pro
   linux-image-5.4.0-1145-oracle   5.4.0-1145.155
                                   Available with Ubuntu Pro
   linux-image-5.4.0-1147-aws      5.4.0-1147.157
                                   Available with Ubuntu Pro
   linux-image-5.4.0-1150-gcp      5.4.0-1150.159
                                   Available with Ubuntu Pro
   linux-image-5.4.0-1152-azure    5.4.0-1152.159
                                   Available with Ubuntu Pro
   linux-image-5.4.0-218-generic   5.4.0-218.238
                                   Available with Ubuntu Pro
   linux-image-5.4.0-218-generic-lpae  5.4.0-218.238
                                   Available with Ubuntu Pro
   linux-image-5.4.0-218-lowlatency  5.4.0-218.238
                                   Available with Ubuntu Pro
   linux-image-aws-lts-20.04       5.4.0.1147.144
                                   Available with Ubuntu Pro
   linux-image-azure-lts-20.04     5.4.0.1152.146
                                   Available with Ubuntu Pro
   linux-image-gcp-lts-20.04       5.4.0.1150.152
                                   Available with Ubuntu Pro
   linux-image-generic             5.4.0.218.210
                                   Available with Ubuntu Pro
   linux-image-generic-lpae        5.4.0.218.210
                                   Available with Ubuntu Pro
   linux-image-ibm-lts-20.04       5.4.0.1093.122
                                   Available with Ubuntu Pro
   linux-image-kvm                 5.4.0.1134.130
                                   Available with Ubuntu Pro
   linux-image-lowlatency          5.4.0.218.210
                                   Available with Ubuntu Pro
   linux-image-oem                 5.4.0.218.210
                                   Available with Ubuntu Pro
   linux-image-oem-osp1            5.4.0.218.210
                                   Available with Ubuntu Pro
   linux-image-oracle-lts-20.04    5.4.0.1145.139
                                   Available with Ubuntu Pro
   linux-image-virtual             5.4.0.218.210
                                   Available with Ubuntu Pro
   linux-image-xilinx-zynqmp       5.4.0.1065.65
                                   Available with Ubuntu Pro

Ubuntu 18.04 LTS
   linux-image-5.4.0-1093-ibm      5.4.0-1093.98~18.04.1
                                   Available with Ubuntu Pro
   linux-image-5.4.0-1145-oracle   5.4.0-1145.155~18.04.1
                                   Available with Ubuntu Pro
   linux-image-5.4.0-1147-aws      5.4.0-1147.157~18.04.1
                                   Available with Ubuntu Pro
   linux-image-5.4.0-1150-gcp      5.4.0-1150.159~18.04.1
                                   Available with Ubuntu Pro
   linux-image-aws                 5.4.0.1147.157~18.04.1
                                   Available with Ubuntu Pro
   linux-image-gcp                 5.4.0.1150.159~18.04.1
                                   Available with Ubuntu Pro
   linux-image-ibm                 5.4.0.1093.98~18.04.1
                                   Available with Ubuntu Pro
   linux-image-oracle              5.4.0.1145.155~18.04.1
                                   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-7585-1

CVE-2021-47211, CVE-2022-49636, CVE-2023-53034, CVE-2024-53168,

CVE-2024-56551, CVE-2024-58093, CVE-2025-21956, CVE-2025-21957,

CVE-2025-21959, CVE-2025-21991, CVE-2025-21992, CVE-2025-21993,

CVE-2025-21996, CVE-2025-22004, CVE-2025-22005, CVE-2025-22007,

CVE-2025-22018, CVE-2025-22020, CVE-2025-22021, CVE-2025-22035,

CVE-2025-22045, CVE-2025-22054, CVE-2025-22063, CVE-2025-22071,

CVE-2025-22073, CVE-2025-22079, CVE-2025-22086, CVE-2025-2312,

CVE-2025-23136, CVE-2025-37937, CVE-2025-38637, CVE-2025-39735

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7585-1

Topics%20covered

Topics Covered

security advisory critical ubuntu linux kernel system exploit cifs issue

Package Information

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