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Ubuntu 25.04: Critical Info Leak Vulnerability in Linux Kernel USN-7834-1

ubuntu
Calendar Grey October 22, 2025
Dist Ubuntu Esm H88
Discover critical security updates for the Linux kernel on Ubuntu systems addressing potential information leaks.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-azure-6.14: Linux kernel for Microsoft Azure cloud systems

- linux-azure-nvidia-6.14: Linux kernel for Microsoft Azure Cloud systems,

N-Series

Details:

Oleksii Oleksenko, Cedric Fournet, Jana Hofmann, Boris Köpf, Stavros Volos,

and Flavien Solt discovered that some AMD processors may allow an attacker

to infer data from previous stores, potentially resulting in the leakage of

privileged information. A local attacker could possibly use this to expose

sensitive information. (CVE-2024-36350, CVE-2024-36357)

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:

- ARM64 architecture;

- PowerPC architecture;

- RISC-V architecture;

- S390 architecture;

- x86 architecture;

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory information leak critical Ubuntu local attack linux-azure

Update Instructions

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

Ubuntu 25.04
   linux-image-6.14.0-1014-azure   6.14.0-1014.14
   linux-image-azure               6.14.0-1014.14
   linux-image-azure-6.14          6.14.0-1014.14

Ubuntu 24.04 LTS
   linux-image-6.14.0-1007-azure-nvidia  6.14.0-1007.7
   linux-image-6.14.0-1014-azure   6.14.0-1014.14~24.04.1
   linux-image-azure               6.14.0-1014.14~24.04.1
   linux-image-azure-6.14          6.14.0-1014.14~24.04.1
   linux-image-azure-nvidia        6.14.0-1007.7
   linux-image-azure-nvidia-6.14   6.14.0-1007.7

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-7834-1

CVE-2024-36350, CVE-2024-36357, CVE-2025-38084, CVE-2025-38085,

CVE-2025-38086, CVE-2025-38087, CVE-2025-38089, CVE-2025-38090,

CVE-2025-38179, CVE-2025-38181, CVE-2025-38182, CVE-2025-38183,

CVE-2025-38184, CVE-2025-38186, CVE-2025-38188, CVE-2025-38189,

CVE-2025-38191, CVE-2025-38192, CVE-2025-38194, CVE-2025-38196,

CVE-2025-38197, CVE-2025-38198, CVE-2025-38199, CVE-2025-38200,

CVE-2025-38201, CVE-2025-38202, CVE-2025-38203, CVE-2025-38204,

CVE-2025-38205, CVE-2025-38206, CVE-2025-38208, CVE-2025-38210,

CVE-2025-38211, CVE-2025-38212, CVE-2025-38217, CVE-2025-38218,

CVE-2025-38219, CVE-2025-38220, CVE-2025-38222, CVE-2025-38223,

CVE-2025-38224, CVE-2025-38225, CVE-2025-38226, CVE-2025-38227,

CVE-2025-38228, CVE-2025-38229, CVE-2025-38231, CVE-2025-38232,

CVE-2025-38233, CVE-2025-38234, CVE-2025-38236, CVE-2025-38237,

CVE-2025-38238, CVE-2025-38239, CVE-2025-38241, CVE-2025-38242,

CVE-2025-38245, CVE-2025-38246, CVE-2025-38248, CVE-2025-38249,

CVE-2025-38250, CVE-2025-38251, CVE-2025-38253, CVE-2025-38254,

CVE-2025-38255, CVE-2025-38256, CVE-2025-38257, CVE-2025-38258,

CVE-2025-38259, CVE-2025-38260, CVE-2025-38261, CVE-2025-38262,

CVE-2025-38263, CVE-2025-38264, CVE-2025-38320, CVE-2025-38321,

CVE-2025-38322, CVE-2025-38324, CVE-2025-38325, CVE-2025-38326,

CVE-2025-38328, CVE-2025-38329, CVE-2025-38330, CVE-2025-38331,

CVE-2025-38332, CVE-2025-38333, CVE-2025-38334, CVE-2025-38336,

CVE-2025-38337, CVE-2025-38338, CVE-2025-38339, CVE-2025-38340,

CVE-2025-38341, CVE-2025-38342, CVE-2025-38343, CVE-2025-38344,

CVE-2025-38345, CVE-2025-38346, CVE-2025-38347, CVE-2025-38348,

CVE-2025-38353, CVE-2025-38354, CVE-2025-38355, CVE-2025-38356,

CVE-2025-38359, CVE-2025-38360, CVE-2025-38361, CVE-2025-38362,

CVE-2025-38363, CVE-2025-38364, CVE-2025-38365, CVE-2025-38368,

CVE-2025-38369, CVE-2025-38370, CVE-2025-38371, CVE-2025-38372,

CVE-2025-38373, CVE-2025-38374, CVE-2025-38375, CVE-2025-38376,

CVE-2025-38377, CVE-2025-38381, CVE-2025-38382, CVE-2025-38383,

CVE-2025-38384, CVE-2025-38385, CVE-2025-38386, CVE-2025-38387,

CVE-2025-38388, CVE-2025-38389, CVE-2025-38390, CVE-2025-38391,

CVE-2025-38392, CVE-2025-38393, CVE-2025-38395, CVE-2025-38396,

CVE-2025-38399, CVE-2025-38400, CVE-2025-38401, CVE-2025-38402,

CVE-2025-38403, CVE-2025-38405, CVE-2025-38406, CVE-2025-38407,

CVE-2025-38408, CVE-2025-38409, CVE-2025-38410, CVE-2025-38411,

CVE-2025-38412, CVE-2025-38413, CVE-2025-38416, CVE-2025-38417,

CVE-2025-38418, CVE-2025-38419, CVE-2025-38420, CVE-2025-38421,

CVE-2025-38422, CVE-2025-38423, CVE-2025-38424, CVE-2025-38425,

CVE-2025-38426, CVE-2025-38427, CVE-2025-38428, CVE-2025-38429,

CVE-2025-38430, CVE-2025-38431, CVE-2025-38434, CVE-2025-38435,

CVE-2025-38436, CVE-2025-38523, CVE-2025-38541, CVE-2025-39682

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7834-1

Topics%20covered

Topics Covered

security advisory information leak critical Ubuntu local attack linux-azure

Package Information

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