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Linux kernel bugs can crash systems or leak data
published 4 years ago
Summary
Multiple flaws have been found in the Linux kernel used by Canonical's Linux packages (including AWS, Azure, HWE, and low‑latency versions). These bugs could let a local user cause a system or virtual machine crash, or in some cases expose private information or run unwanted code. Apply the latest security updates for the affected Linux packages as soon as possible to protect your systems.
What to do
- Update canonical linux-aws-5.15 to version 5.15.0-1021.25~20.04.1.
- Update canonical linux-azure-5.15 to version 5.15.0-1021.26~20.04.1.
- Update canonical linux-hwe-5.15 to version 5.15.0-50.56~20.04.1.
- Update canonical linux-lowlatency-hwe-5.15 to version 5.15.0-50.56~20.04.1.
- Update canonical linux to version 5.15.0-50.56.
- Update canonical linux-aws to version 5.15.0-1021.25.
- Update canonical linux-azure to version 5.15.0-1021.26.
- Update canonical linux-gcp to version 5.15.0-1019.25.
- Update canonical linux-gke to version 5.15.0-1017.20.
- Update canonical linux-gkeop to version 5.15.0-1004.6.
- Update canonical linux-kvm to version 5.15.0-1019.23.
- Update canonical linux-lowlatency to version 5.15.0-50.56.
- Update canonical linux-oracle to version 5.15.0-1019.24.
- Update canonical linux-raspi to version 5.15.0-1016.18.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Ubuntu:20.04:LTS | canonical | linux-aws-5.15 |
< 5.15.0-1021.25~20.04.1 Fix: upgrade to 5.15.0-1021.25~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-azure-5.15 |
< 5.15.0-1021.26~20.04.1 Fix: upgrade to 5.15.0-1021.26~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-hwe-5.15 |
< 5.15.0-50.56~20.04.1 Fix: upgrade to 5.15.0-50.56~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-lowlatency-hwe-5.15 |
< 5.15.0-50.56~20.04.1 Fix: upgrade to 5.15.0-50.56~20.04.1
|
| Ubuntu:22.04:LTS | canonical | linux |
< 5.15.0-50.56 Fix: upgrade to 5.15.0-50.56
|
| Ubuntu:22.04:LTS | canonical | linux-aws |
< 5.15.0-1021.25 Fix: upgrade to 5.15.0-1021.25
|
| Ubuntu:22.04:LTS | canonical | linux-azure |
< 5.15.0-1021.26 Fix: upgrade to 5.15.0-1021.26
|
| Ubuntu:22.04:LTS | canonical | linux-gcp |
< 5.15.0-1019.25 Fix: upgrade to 5.15.0-1019.25
|
| Ubuntu:22.04:LTS | canonical | linux-gke |
< 5.15.0-1017.20 Fix: upgrade to 5.15.0-1017.20
|
| Ubuntu:22.04:LTS | canonical | linux-gkeop |
< 5.15.0-1004.6 Fix: upgrade to 5.15.0-1004.6
|
| Ubuntu:22.04:LTS | canonical | linux-kvm |
< 5.15.0-1019.23 Fix: upgrade to 5.15.0-1019.23
|
| Ubuntu:22.04:LTS | canonical | linux-lowlatency |
< 5.15.0-50.56 Fix: upgrade to 5.15.0-50.56
|
| Ubuntu:22.04:LTS | canonical | linux-oracle |
< 5.15.0-1019.24 Fix: upgrade to 5.15.0-1019.24
|
| Ubuntu:22.04:LTS | canonical | linux-raspi |
< 5.15.0-1016.18 Fix: upgrade to 5.15.0-1016.18
|
Original advisory text
linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15, linux-gcp, linux-gke, linux-gkeop, linux-hwe-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-oracle, linux-raspi vulnerabilities
Selim Enes Karaduman discovered that a race condition existed in the
General notification queue implementation of the Linux kernel, leading to a
use-after-free vulnerability. A local attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2022-1882)
Pawan Kumar Gupta, Alyssa Milburn, Amit Peled, Shani Rehana, Nir Shildan
and Ariel Sabba discovered that some Intel processors with Enhanced
Indirect Branch Restricted Speculation (eIBRS) did not properly handle RET
instructions after a VM exits. A local attacker could potentially use this
to expose sensitive information. (CVE-2022-26373)
Eric Biggers discovered that a use-after-free vulnerability existed in the
io_uring subsystem in the Linux kernel. A local attacker could possibly use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2022-3176)
It was discovered that the Netlink Transformation (XFRM) subsystem in the
Linux kernel contained a reference counting error. A local attacker could
use this to cause a denial of service (system crash). (CVE-2022-36879)
Jann Horn discovered that the KVM subsystem in the Linux kernel did not
properly handle TLB flush operations in some situations. A local attacker
in a guest VM could use this to cause a denial of service (guest crash) or
possibly execute arbitrary code in the guest kernel. (CVE-2022-39189)
References
- https://ubuntu.com/security/notices/USN-5667-1 Vendor Advisory
- https://ubuntu.com/security/CVE-2022-1882 Third Party Advisory
- https://ubuntu.com/security/CVE-2022-3176 Third Party Advisory
- https://ubuntu.com/security/CVE-2022-26373 Third Party Advisory
- https://ubuntu.com/security/CVE-2022-36879 Third Party Advisory
- https://ubuntu.com/security/CVE-2022-39189 Third Party Advisory
Timeline
Published10 Oct 2022
Updated14 Sep 2026
First seen14 Sep 2026
Sources
USN-5667-1 · OSV
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