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Ubuntu 26.04 Linux Kernel Privilege Escalation Vulnerabilities USN-8568-1

ubuntu
Calendar Grey July 20, 2026
Scroller Ubuntu
Several security issues fixed in Ubuntu Linux kernel affecting local attack vectors, update recommended for safety.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-7.0: Linux kernel for OEM systems

Details:

It was discovered that some AMD Zen 2 processors did not properly isolate

shared resources in the operation cache. A local attacker could possibly

use this issue to corrupt instructions executed at a higher privilege

level, resulting in privilege escalation. (CVE-2025-54518)

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:

- PSP security protocol;

- ARM64 architecture;

- PowerPC architecture;

- RISC-V architecture;

- S390 architecture;

- User-Mode Linux (UML);

- x86 architecture;

- Block layer subsystem;

- Cryptographic API;

- Intel NPU Driver;

- DRBD Distributed Replicated Block Device drivers;

- Ublk userspace block driver;

- Bluetooth drivers;

- Bus devices;

- Character device driver;

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory privilege escalation Ubuntu vulnerability Linux kernel AMD Zen

Update Instructions

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

Ubuntu 26.04 LTS
  linux-image-7.0.0-1009-oem      7.0.0-1009.9
  linux-image-oem-26.04           7.0.0-1009.9
  linux-image-oem-26.04a          7.0.0-1009.9
  linux-image-oem-7.0             7.0.0-1009.9

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-8568-1

CVE-2025-54518, CVE-2026-43490, CVE-2026-43492, CVE-2026-43495,

CVE-2026-43496, CVE-2026-43497, CVE-2026-43498, CVE-2026-43502,

CVE-2026-45834, CVE-2026-45835, CVE-2026-45836, CVE-2026-45837,

CVE-2026-45838, CVE-2026-45839, CVE-2026-45840, CVE-2026-45841,

CVE-2026-45842, CVE-2026-45843, CVE-2026-45844, CVE-2026-45845,

CVE-2026-45846, CVE-2026-46104, CVE-2026-46105, CVE-2026-46106,

CVE-2026-46107, CVE-2026-46108, CVE-2026-46109, CVE-2026-46110,

CVE-2026-46111, CVE-2026-46112, CVE-2026-46113, CVE-2026-46114,

CVE-2026-46116, CVE-2026-46117, CVE-2026-46118, CVE-2026-46120,

CVE-2026-46121, CVE-2026-46122, CVE-2026-46123, CVE-2026-46124,

CVE-2026-46125, CVE-2026-46126, CVE-2026-46127, CVE-2026-46128,

CVE-2026-46129, CVE-2026-46130, CVE-2026-46131, CVE-2026-46132,

CVE-2026-46133, CVE-2026-46134, CVE-2026-46136, CVE-2026-46138,

CVE-2026-46139, CVE-2026-46140, CVE-2026-46141, CVE-2026-46142,

CVE-2026-46143, CVE-2026-46144, CVE-2026-46145, CVE-2026-46146,

CVE-2026-46147, CVE-2026-46148, CVE-2026-46149, CVE-2026-46150,

CVE-2026-46151, CVE-2026-46152, CVE-2026-46153, CVE-2026-46154,

CVE-2026-46156, CVE-2026-46157, CVE-2026-46158, CVE-2026-46159,

CVE-2026-46160, CVE-2026-46161, CVE-2026-46162, CVE-2026-46163,

CVE-2026-46164, CVE-2026-46165, CVE-2026-46166, CVE-2026-46167,

CVE-2026-46168, CVE-2026-46169, CVE-2026-46170, CVE-2026-46171,

CVE-2026-46172, CVE-2026-46173, CVE-2026-46174, CVE-2026-46175,

CVE-2026-46176, CVE-2026-46177, CVE-2026-46178, CVE-2026-46179,

CVE-2026-46180, CVE-2026-46181, CVE-2026-46182, CVE-2026-46183,

CVE-2026-46184, CVE-2026-46186, CVE-2026-46187, CVE-2026-46188,

CVE-2026-46189, CVE-2026-46190, CVE-2026-46191, CVE-2026-46192,

CVE-2026-46193, CVE-2026-46194, CVE-2026-46196, CVE-2026-46197,

CVE-2026-46198, CVE-2026-46199, CVE-2026-46200, CVE-2026-46201,

CVE-2026-46202, CVE-2026-46203, CVE-2026-46204, CVE-2026-46205,

CVE-2026-46206, CVE-2026-46207, CVE-2026-46208, CVE-2026-46209,

CVE-2026-46210, CVE-2026-46211, CVE-2026-46212, CVE-2026-46213,

CVE-2026-46214, CVE-2026-46215, CVE-2026-46216, CVE-2026-46218,

CVE-2026-46219, CVE-2026-46220, CVE-2026-46221, CVE-2026-46222,

CVE-2026-46223, CVE-2026-46224, CVE-2026-46225, CVE-2026-46226,

CVE-2026-46227, CVE-2026-46228, CVE-2026-46229, CVE-2026-46230,

CVE-2026-46231, CVE-2026-46232, CVE-2026-46233, CVE-2026-46234,

CVE-2026-46235, CVE-2026-46236, CVE-2026-46238, CVE-2026-46239,

CVE-2026-46240, CVE-2026-46241, CVE-2026-46242, CVE-2026-46273,

CVE-2026-46274, CVE-2026-46275, CVE-2026-46290, CVE-2026-46291,

CVE-2026-46292, CVE-2026-46293, CVE-2026-46294, CVE-2026-46295,

CVE-2026-46296, CVE-2026-46297, CVE-2026-46298, CVE-2026-46299,

CVE-2026-46301, CVE-2026-46302, CVE-2026-46303, CVE-2026-46304,

CVE-2026-46305, CVE-2026-46306, CVE-2026-46307, CVE-2026-46308,

CVE-2026-46309, CVE-2026-46310, CVE-2026-46311, CVE-2026-46312,

CVE-2026-46313, CVE-2026-46314, CVE-2026-46315, CVE-2026-46317,

CVE-2026-46318, CVE-2026-46319, CVE-2026-46320, CVE-2026-46321,

CVE-2026-46322, CVE-2026-46324, CVE-2026-52911, CVE-2026-52912,

CVE-2026-52913, CVE-2026-52914, CVE-2026-52915, CVE-2026-52916,

CVE-2026-52918, CVE-2026-52919, CVE-2026-52920, CVE-2026-52921,

CVE-2026-52922, CVE-2026-52923, CVE-2026-52925, CVE-2026-52926,

CVE-2026-52927, CVE-2026-52928, CVE-2026-52931, CVE-2026-52932,

CVE-2026-52934, CVE-2026-52936, CVE-2026-52937, CVE-2026-52941,

CVE-2026-52943, CVE-2026-52944, CVE-2026-52949, CVE-2026-52950,

CVE-2026-52951, CVE-2026-52952, CVE-2026-52953, CVE-2026-52954,

CVE-2026-52955, CVE-2026-52956, CVE-2026-52957, CVE-2026-52958,

CVE-2026-52959, CVE-2026-52960, CVE-2026-52961, CVE-2026-52962,

CVE-2026-52963, CVE-2026-52964, CVE-2026-52965, CVE-2026-52967,

CVE-2026-52968, CVE-2026-52969, CVE-2026-52970, CVE-2026-52971,

CVE-2026-52973, CVE-2026-52974, CVE-2026-52975, CVE-2026-52976,

CVE-2026-52977, CVE-2026-52978, CVE-2026-52979, CVE-2026-52980,

CVE-2026-52981, CVE-2026-52982, CVE-2026-52983, CVE-2026-52984,

CVE-2026-52985, CVE-2026-52986, CVE-2026-52987, CVE-2026-52988,

CVE-2026-52989, CVE-2026-52990, CVE-2026-52991, CVE-2026-52992,

CVE-2026-52993, CVE-2026-52994, CVE-2026-52995, CVE-2026-52996,

CVE-2026-52997, CVE-2026-52998, CVE-2026-52999, CVE-2026-53000,

CVE-2026-53001, CVE-2026-53002, CVE-2026-53003, CVE-2026-53004,

CVE-2026-53005, CVE-2026-53006, CVE-2026-53007, CVE-2026-53008,

CVE-2026-53009, CVE-2026-53010, CVE-2026-53011, CVE-2026-53012,

CVE-2026-53013, CVE-2026-53014, CVE-2026-53015, CVE-2026-53016,

CVE-2026-53017, CVE-2026-53018, CVE-2026-53019, CVE-2026-53020,

CVE-2026-53021, CVE-2026-53022, CVE-2026-53023, CVE-2026-53024,

CVE-2026-53025, CVE-2026-53026, CVE-2026-53027, CVE-2026-53028,

CVE-2026-53029, CVE-2026-53030, CVE-2026-53031, CVE-2026-53032,

CVE-2026-53033, CVE-2026-53034, CVE-2026-53035, CVE-2026-53036,

CVE-2026-53037, CVE-2026-53038, CVE-2026-53039, CVE-2026-53040,

CVE-2026-53041, CVE-2026-53042, CVE-2026-53043, CVE-2026-53044,

CVE-2026-53045, CVE-2026-53046, CVE-2026-53047, CVE-2026-53048,

CVE-2026-53049, CVE-2026-53050, CVE-2026-53051, CVE-2026-53052,

CVE-2026-53053, CVE-2026-53054, CVE-2026-53055, CVE-2026-53056,

CVE-2026-53057, CVE-2026-53058, CVE-2026-53059, CVE-2026-53060,

CVE-2026-53061, CVE-2026-53062, CVE-2026-53063, CVE-2026-53064,

CVE-2026-53065, CVE-2026-53066, CVE-2026-53067, CVE-2026-53068,

CVE-2026-53069, CVE-2026-53070, CVE-2026-53071, CVE-2026-53072,

CVE-2026-53073, CVE-2026-53074, CVE-2026-53075, CVE-2026-53076,

CVE-2026-53077, CVE-2026-53078, CVE-2026-53079, CVE-2026-53080,

CVE-2026-53081, CVE-2026-53082, CVE-2026-53083, CVE-2026-53084,

CVE-2026-53085, CVE-2026-53086, CVE-2026-53087, CVE-2026-53088,

CVE-2026-53089, CVE-2026-53090, CVE-2026-53091, CVE-2026-53092,

CVE-2026-53093, CVE-2026-53094, CVE-2026-53095, CVE-2026-53096,

CVE-2026-53097, CVE-2026-53098, CVE-2026-53099, CVE-2026-53100,

CVE-2026-53101, CVE-2026-53102, CVE-2026-53103, CVE-2026-53104,

CVE-2026-53105, CVE-2026-53106, CVE-2026-53107, CVE-2026-53108,

CVE-2026-53109, CVE-2026-53110, CVE-2026-53111, CVE-2026-53112,

CVE-2026-53113, CVE-2026-53114, CVE-2026-53115, CVE-2026-53116,

CVE-2026-53117, CVE-2026-53118, CVE-2026-53119, CVE-2026-53120,

CVE-2026-53121, CVE-2026-53122, CVE-2026-53123, CVE-2026-53124,

CVE-2026-53125, CVE-2026-53126, CVE-2026-53127, CVE-2026-53128,

CVE-2026-53129, CVE-2026-53130, CVE-2026-53277, CVE-2026-53278,

CVE-2026-53279, CVE-2026-53280, CVE-2026-53281, CVE-2026-53282,

CVE-2026-53283, CVE-2026-53284, CVE-2026-53285, CVE-2026-53286,

CVE-2026-53287, CVE-2026-53288, CVE-2026-53289, CVE-2026-53290,

CVE-2026-53291, CVE-2026-53292, CVE-2026-53293, CVE-2026-53294,

CVE-2026-53295, CVE-2026-53296, CVE-2026-53297, CVE-2026-53298,

CVE-2026-53299, CVE-2026-53300, CVE-2026-53301, CVE-2026-53302,

CVE-2026-53303, CVE-2026-53304, CVE-2026-53305, CVE-2026-53306,

CVE-2026-53307, CVE-2026-53308, CVE-2026-53309, CVE-2026-53310,

CVE-2026-53311, CVE-2026-53312, CVE-2026-53313, CVE-2026-53314,

CVE-2026-53315, CVE-2026-53316, CVE-2026-53317, CVE-2026-53318,

CVE-2026-53319, CVE-2026-53320, CVE-2026-53321, CVE-2026-53322,

CVE-2026-53323, CVE-2026-53324, CVE-2026-53357, CVE-2026-53358,

CVE-2026-53360, CVE-2026-53364, CVE-2026-53365

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8568-1

Topics%20covered

Topics Covered

security advisory privilege escalation Ubuntu vulnerability Linux kernel AMD Zen

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-7.0/7.0.0-1009.9

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