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Ubuntu 26.04 Linux Kernel Critical Local Access Flaws USN-8488-1

ubuntu
Calendar Grey July 1, 2026
Dist Ubuntu Esm H88
Critical security advisory for Ubuntu fixing multiple issues in the Linux kernel, impacting local system access and data security.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

Details:

It was discovered that some AMD processors did not properly clear data in

the floating point divider unit during speculative execution. A local

attacker could use this to expose sensitive information. (CVE-2025-54505)

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;

- x86 architecture;

- Block layer subsystem;

- Cryptographic API;

- Rados block device (RBD) driver;

- Compressed RAM block device driver;

- Character device driver;

- TPM device driver;

- Hardware crypto device drivers;

- EDAC drivers;

- GPU drivers;

- Greybus drivers;

- HID subsystem;

- Microsoft Hyper-V drivers;

- Hardware monitoring drivers;

- I2C subsystem;

- IIO subsystem;

- InfiniBand drivers;

- Input Device core d...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory critical Ubuntu local access Linux kernel sensitive data

Update Instructions

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

Ubuntu 26.04 LTS
  linux-image-7.0.0-27-generic    7.0.0-27.27
  linux-image-7.0.0-27-generic-64k  7.0.0-27.27
  linux-image-generic             7.0.0-27.27
  linux-image-generic-64k         7.0.0-27.27
  linux-image-generic-64k-7.0     7.0.0-27.27
  linux-image-generic-64k-hwe-26.04  7.0.0-27.27
  linux-image-generic-7.0         7.0.0-27.27
  linux-image-generic-hwe-26.04   7.0.0-27.27
  linux-image-oem-24.04           7.0.0-27.27
  linux-image-oem-24.04a          7.0.0-27.27
  linux-image-oem-24.04b          7.0.0-27.27
  linux-image-oem-24.04c          7.0.0-27.27
  linux-image-oem-24.04d          7.0.0-27.27
  linux-image-virtual             7.0.0-27.27
  linux-image-virtual-7.0         7.0.0-27.27
  linux-image-virtual-hwe-26.04   7.0.0-27.27

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-8488-1

CVE-2025-54505, CVE-2026-31532, CVE-2026-31574, CVE-2026-31575,

CVE-2026-31576, CVE-2026-31577, CVE-2026-31578, CVE-2026-31579,

CVE-2026-31580, CVE-2026-31581, CVE-2026-31582, CVE-2026-31583,

CVE-2026-31584, CVE-2026-31585, CVE-2026-31586, CVE-2026-31587,

CVE-2026-31588, CVE-2026-31589, CVE-2026-31590, CVE-2026-31591,

CVE-2026-31592, CVE-2026-31593, CVE-2026-31594, CVE-2026-31595,

CVE-2026-31596, CVE-2026-31597, CVE-2026-31598, CVE-2026-31599,

CVE-2026-31600, CVE-2026-31601, CVE-2026-31602, CVE-2026-31603,

CVE-2026-31604, CVE-2026-31605, CVE-2026-31606, CVE-2026-31607,

CVE-2026-31608, CVE-2026-31609, CVE-2026-31610, CVE-2026-31611,

CVE-2026-31612, CVE-2026-31613, CVE-2026-31614, CVE-2026-31615,

CVE-2026-31616, CVE-2026-31617, CVE-2026-31618, CVE-2026-31619,

CVE-2026-31620, CVE-2026-31621, CVE-2026-31622, CVE-2026-31623,

CVE-2026-31624, CVE-2026-31625, CVE-2026-31626, CVE-2026-31627,

CVE-2026-31628, CVE-2026-31629, CVE-2026-31686, CVE-2026-31694,

CVE-2026-31696, CVE-2026-31697, CVE-2026-31698, CVE-2026-31699,

CVE-2026-31700, CVE-2026-31701, CVE-2026-31702, CVE-2026-31703,

CVE-2026-31704, CVE-2026-31705, CVE-2026-31706, CVE-2026-31707,

CVE-2026-31708, CVE-2026-31709, CVE-2026-31710, CVE-2026-31711,

CVE-2026-31712, CVE-2026-31713, CVE-2026-31714, CVE-2026-31715,

CVE-2026-31716, CVE-2026-31717, CVE-2026-31718, CVE-2026-31719,

CVE-2026-43058, CVE-2026-43071, CVE-2026-43072, CVE-2026-43073,

CVE-2026-43348, CVE-2026-43349, CVE-2026-43350, CVE-2026-43491,

CVE-2026-43493, CVE-2026-43499, CVE-2026-43501, CVE-2026-45986,

CVE-2026-45987, CVE-2026-45988, CVE-2026-45989, CVE-2026-45990,

CVE-2026-45991, CVE-2026-45994, CVE-2026-45995, CVE-2026-45996,

CVE-2026-45997, CVE-2026-45999, CVE-2026-46001, CVE-2026-46002,

CVE-2026-46003, CVE-2026-46004, CVE-2026-46005, CVE-2026-46006,

CVE-2026-46007, CVE-2026-46008, CVE-2026-46009, CVE-2026-46010,

CVE-2026-46011, CVE-2026-46012, CVE-2026-46013, CVE-2026-46014,

CVE-2026-46015, CVE-2026-46016, CVE-2026-46018, CVE-2026-46019,

CVE-2026-46020, CVE-2026-46021, CVE-2026-46022, CVE-2026-46023,

CVE-2026-46024, CVE-2026-46025, CVE-2026-46026, CVE-2026-46027,

CVE-2026-46028, CVE-2026-46029, CVE-2026-46030, CVE-2026-46031,

CVE-2026-46032, CVE-2026-46033, CVE-2026-46034, CVE-2026-46035,

CVE-2026-46036, CVE-2026-46037, CVE-2026-46038, CVE-2026-46039,

CVE-2026-46040, CVE-2026-46041, CVE-2026-46042, CVE-2026-46043,

CVE-2026-46044, CVE-2026-46045, CVE-2026-46046, CVE-2026-46047,

CVE-2026-46049, CVE-2026-46050, CVE-2026-46051, CVE-2026-46052,

CVE-2026-46053, CVE-2026-46054, CVE-2026-46056, CVE-2026-46057,

CVE-2026-46058, CVE-2026-46059, CVE-2026-46060, CVE-2026-46061,

CVE-2026-46062, CVE-2026-46063, CVE-2026-46064, CVE-2026-46065,

CVE-2026-46066, CVE-2026-46067, CVE-2026-46068, CVE-2026-46069,

CVE-2026-46070, CVE-2026-46071, CVE-2026-46072, CVE-2026-46073,

CVE-2026-46074, CVE-2026-46075, CVE-2026-46076, CVE-2026-46077,

CVE-2026-46078, CVE-2026-46079, CVE-2026-46080, CVE-2026-46081,

CVE-2026-46082, CVE-2026-46083, CVE-2026-46084, CVE-2026-46085,

CVE-2026-46086, CVE-2026-46087, CVE-2026-46088, CVE-2026-46089,

CVE-2026-46090, CVE-2026-46091, CVE-2026-46092, CVE-2026-46093,

CVE-2026-46094, CVE-2026-46095, CVE-2026-46096, CVE-2026-46097,

CVE-2026-46098, CVE-2026-46099, CVE-2026-46100, CVE-2026-46101,

CVE-2026-46102, CVE-2026-46103, CVE-2026-46115, CVE-2026-46119,

CVE-2026-46135, CVE-2026-46137, CVE-2026-46155, CVE-2026-46185,

CVE-2026-46195, CVE-2026-46243, CVE-2026-46244, CVE-2026-46276,

CVE-2026-46277, CVE-2026-46278, CVE-2026-46279, CVE-2026-46280,

CVE-2026-46281, CVE-2026-46282, CVE-2026-46283, CVE-2026-46284,

CVE-2026-46285, CVE-2026-46286, CVE-2026-46287, CVE-2026-46288,

CVE-2026-46289, CVE-2026-46316, CVE-2026-46332, CVE-2026-52904,

CVE-2026-52905, CVE-2026-52906, CVE-2026-52907, CVE-2026-52933

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8488-1

Topics%20covered

Topics Covered

security advisory critical Ubuntu local access Linux kernel sensitive data

Package Information

https://launchpad.net/ubuntu/+source/linux/7.0.0-27.27

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