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Ubuntu Kernel 20.04 LTS Upgrade Important Security Flaws USN-8493-2

ubuntu
Calendar Grey July 2, 2026
Dist Ubuntu Esm H88
Fixes multiple security issues in the Ubuntu Linux kernel. Update recommended to protect against potential system compromises.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oracle-5.15: Linux kernel for Oracle Cloud systems

Details:

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:

- RISC-V architecture;

- Cryptographic API;

- InfiniBand drivers;

- IOMMU subsystem;

- Network drivers;

- STMicroelectronics network drivers;

- NVME drivers;

- x86 platform drivers;

- SCSI subsystem;

- SPI subsystem;

- TCM subsystem;

- USB over IP driver;

- File systems infrastructure;

- HFS+ file system;

- Network file system (NFS) server daemon;

- SMB network file system;

- IPv6 networking;

- Tracing infrastructure;

- Timer subsystem;

- B.A.T.M.A.N. meshing protocol;

- Bluetooth subsystem;

- Ethernet bridge;

- Ceph Core library;

- IPv4 networking;

- MAC80211 subsystem;

- Multipath TCP;

- Netfilter;

- R...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory Ubuntu important kernel issue system compromise linux-oracle

Update Instructions

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

Ubuntu 20.04 LTS
  linux-image-5.15.0-1108-oracle  5.15.0-1108.114~20.04.1
                                  Available with Ubuntu Pro
  linux-image-oracle              5.15.0.1108.114~20.04.1
                                  Available with Ubuntu Pro
  linux-image-oracle-5.15         5.15.0.1108.114~20.04.1
                                  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-8493-2

https://ubuntu.com/security/notices/USN-8493-1

CVE-2022-48816, CVE-2023-53673, CVE-2025-37778, CVE-2025-37822,

CVE-2025-37924, CVE-2025-38201, CVE-2025-40082, CVE-2025-68214,

CVE-2025-68263, CVE-2025-71089, CVE-2025-71220, CVE-2025-71222,

CVE-2025-71224, CVE-2026-23176, CVE-2026-23180, CVE-2026-23182,

CVE-2026-23190, CVE-2026-23193, CVE-2026-23198, CVE-2026-23202,

CVE-2026-23206, CVE-2026-23216, CVE-2026-23256, CVE-2026-23257,

CVE-2026-23258, CVE-2026-23262, CVE-2026-23272, CVE-2026-23278,

CVE-2026-23428, CVE-2026-23450, CVE-2026-23455, CVE-2026-31402,

CVE-2026-31418, CVE-2026-31478, CVE-2026-31607, CVE-2026-31637,

CVE-2026-31649, CVE-2026-31657, CVE-2026-31659, CVE-2026-31668,

CVE-2026-31669, CVE-2026-31682, CVE-2026-31685, CVE-2026-43011,

CVE-2026-43037, CVE-2026-43038, CVE-2026-43071, CVE-2026-43114,

CVE-2026-43117, CVE-2026-43186, CVE-2026-43304, CVE-2026-43341,

CVE-2026-43383, CVE-2026-43406, CVE-2026-43407, CVE-2026-43414,

CVE-2026-43493, CVE-2026-43501, CVE-2026-45988, CVE-2026-46043,

CVE-2026-46119, CVE-2026-46135, CVE-2026-46195, CVE-2026-46243

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8493-2

Topics%20covered

Topics Covered

security advisory Ubuntu important kernel issue system compromise linux-oracle

Package Information

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