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Ubuntu 25.04, USN-7879-4, Linux Kernel Important Security Issues

ubuntu
Calendar Grey December 4, 2025
Dist Ubuntu Esm H88
Several security issues fixed in Ubuntu Linux kernel updates addressing critical threats and data integrity risks.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-gcp-6.14: Linux kernel for Google Cloud Platform (GCP) systems

Details:

It was discovered that improper initialization of CPU cache memory could

allow a local attacker with hypervisor access to overwrite SEV-SNP guest

memory resulting in loss of data integrity. (CVE-2024-36331)

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;

- S390 architecture;

- x86 architecture;

- Network block device driver;

- Character device driver;

- Clock framework and drivers;

- Data acquisition framework and drivers;

- Hardware crypto device drivers;

- Device frequency scaling framework;

- DMA engine subsystem;

- EDAC drivers;

- GPU drivers;

- HID subsystem;

- ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory Ubuntu important local attack data integrity Linux kernel

Update Instructions

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

Ubuntu 25.04
  linux-image-6.14.0-1018-raspi   6.14.0-1018.18
  linux-image-raspi               6.14.0-1018.18
  linux-image-raspi-6.14          6.14.0-1018.18

Ubuntu 24.04 LTS
  linux-image-6.14.0-1020-gcp     6.14.0-1020.21~24.04.1
  linux-image-6.14.0-1020-gcp-64k  6.14.0-1020.21~24.04.1
  linux-image-gcp                 6.14.0-1020.21~24.04.1
  linux-image-gcp-6.14            6.14.0-1020.21~24.04.1
  linux-image-gcp-64k             6.14.0-1020.21~24.04.1
  linux-image-gcp-64k-6.14        6.14.0-1020.21~24.04.1

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-7879-4

https://ubuntu.com/security/notices/USN-7879-3

https://ubuntu.com/security/notices/USN-7879-2

https://ubuntu.com/security/notices/USN-7879-1

CVE-2024-36331, CVE-2025-38335, CVE-2025-38349, CVE-2025-38351,

CVE-2025-38437, CVE-2025-38438, CVE-2025-38439, CVE-2025-38440,

CVE-2025-38441, CVE-2025-38443, CVE-2025-38444, CVE-2025-38445,

CVE-2025-38446, CVE-2025-38448, CVE-2025-38449, CVE-2025-38450,

CVE-2025-38451, CVE-2025-38452, CVE-2025-38453, CVE-2025-38454,

CVE-2025-38455, CVE-2025-38456, CVE-2025-38457, CVE-2025-38458,

CVE-2025-38459, CVE-2025-38460, CVE-2025-38461, CVE-2025-38462,

CVE-2025-38463, CVE-2025-38464, CVE-2025-38465, CVE-2025-38466,

CVE-2025-38467, CVE-2025-38468, CVE-2025-38469, CVE-2025-38470,

CVE-2025-38471, CVE-2025-38472, CVE-2025-38473, CVE-2025-38474,

CVE-2025-38475, CVE-2025-38476, CVE-2025-38478, CVE-2025-38480,

CVE-2025-38481, CVE-2025-38482, CVE-2025-38483, CVE-2025-38484,

CVE-2025-38485, CVE-2025-38487, CVE-2025-38488, CVE-2025-38489,

CVE-2025-38490, CVE-2025-38491, CVE-2025-38492, CVE-2025-38493,

CVE-2025-38494, CVE-2025-38495, CVE-2025-38496, CVE-2025-38497,

CVE-2025-38501, CVE-2025-38503, CVE-2025-38505, CVE-2025-38506,

CVE-2025-38507, CVE-2025-38508, CVE-2025-38509, CVE-2025-38510,

CVE-2025-38511, CVE-2025-38512, CVE-2025-38513, CVE-2025-38514,

CVE-2025-38515, CVE-2025-38516, CVE-2025-38517, CVE-2025-38520,

CVE-2025-38521, CVE-2025-38524, CVE-2025-38525, CVE-2025-38526,

CVE-2025-38527, CVE-2025-38528, CVE-2025-38529, CVE-2025-38530,

CVE-2025-38531, CVE-2025-38532, CVE-2025-38533, CVE-2025-38534,

CVE-2025-38535, CVE-2025-38537, CVE-2025-38538, CVE-2025-38539,

CVE-2025-38540, CVE-2025-38542, CVE-2025-38543, CVE-2025-38544,

CVE-2025-38545, CVE-2025-38546, CVE-2025-38547, CVE-2025-38548,

CVE-2025-38549, CVE-2025-38550, CVE-2025-38551, CVE-2025-38552,

CVE-2025-38553, CVE-2025-38555, CVE-2025-38556, CVE-2025-38557,

CVE-2025-38558, CVE-2025-38559, CVE-2025-38560, CVE-2025-38561,

CVE-2025-38562, CVE-2025-38563, CVE-2025-38565, CVE-2025-38566,

CVE-2025-38567, CVE-2025-38568, CVE-2025-38569, CVE-2025-38570,

CVE-2025-38571, CVE-2025-38572, CVE-2025-38573, CVE-2025-38574,

CVE-2025-38576, CVE-2025-38577, CVE-2025-38578, CVE-2025-38579,

CVE-2025-38581, CVE-2025-38582, CVE-2025-38583, CVE-2025-38584,

CVE-2025-38585, CVE-2025-38586, CVE-2025-38587, CVE-2025-38588,

CVE-2025-38589, CVE-2025-38590, CVE-2025-38593, CVE-2025-38595,

CVE-2025-38601, CVE-2025-38602, CVE-2025-38604, CVE-2025-38605,

CVE-2025-38606, CVE-2025-38608, CVE-2025-38609, CVE-2025-38610,

CVE-2025-38612, CVE-2025-38615, CVE-2025-38616, CVE-2025-38619,

CVE-2025-38622, CVE-2025-38623, CVE-2025-38624, CVE-2025-38625,

CVE-2025-38626, CVE-2025-38628, CVE-2025-38629, CVE-2025-38630,

CVE-2025-38631, CVE-2025-38632, CVE-2025-38634, CVE-2025-38635,

CVE-2025-38639, CVE-2025-38640, CVE-2025-38642, CVE-2025-38643,

CVE-2025-38644, CVE-2025-38645, CVE-2025-38646, CVE-2025-38648,

CVE-2025-38649, CVE-2025-38650, CVE-2025-38652, CVE-2025-38653,

CVE-2025-38654, CVE-2025-38655, CVE-2025-38659, CVE-2025-38660,

CVE-2025-38662, CVE-2025-38663, CVE-2025-38664, CVE-2025-38665,

CVE-2025-38666, CVE-2025-38668, CVE-2025-38670, CVE-2025-38671,

CVE-2025-38675, CVE-2025-38678, CVE-2025-39725, CVE-2025-39726,

CVE-2025-39727, CVE-2025-39730, CVE-2025-39731, CVE-2025-39732,

CVE-2025-39734, CVE-2025-39809, CVE-2025-39818, CVE-2025-40157

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7879-4

Topics%20covered

Topics Covered

security advisory Ubuntu important local attack data integrity Linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-raspi/6.14.0-1018.18
https://launchpad.net/ubuntu/+source/linux-gcp-6.14/6.14.0-1020.21~24.04.1

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