Home / mailings [USN-7758-1] Linux kernel vulnerability
Posted on 19 September 2025
Ubuntu Security==========================================================================Ubuntu Security Notice USN-7758-1
September 19, 2025
linux, linux-aws, linux-gcp, linux-gke, linux-gkeop, linux-hwe-6.8,
linux-lowlatency, linux-lowlatency-hwe-6.8, linux-oracle vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
Summary:
The system could be made to crash or run programs as an administrator.
Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke: Linux kernel for Google Container Engine (GKE) systems
- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems
- linux-lowlatency: Linux low latency kernel
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-hwe-6.8: Linux hardware enablement (HWE) kernel
- linux-lowlatency-hwe-6.8: Linux low latency kernel
Details:
It was discovered that the AF_UNIX socket garbage collection implementation
in Ubuntu Noble's 6.8 kernel did not properly handle out-of-band (OOB)
messages, leading to a use-after-free vulnerability. An attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 24.04 LTS
linux-image-6.8.0-1022-gkeop 6.8.0-1022.24
linux-image-6.8.0-1035-gke 6.8.0-1035.39
linux-image-6.8.0-1035-oracle 6.8.0-1035.36
linux-image-6.8.0-1035-oracle-64k 6.8.0-1035.36
linux-image-6.8.0-1038-aws 6.8.0-1038.40
linux-image-6.8.0-1038-aws-64k 6.8.0-1038.40
linux-image-6.8.0-1039-gcp 6.8.0-1039.41
linux-image-6.8.0-1039-gcp-64k 6.8.0-1039.41
linux-image-6.8.0-83-generic 6.8.0-83.83
linux-image-6.8.0-83-generic-64k 6.8.0-83.83
linux-image-6.8.0-83-lowlatency 6.8.0-83.83.1
linux-image-6.8.0-83-lowlatency-64k 6.8.0-83.83.1
linux-image-aws-6.8 6.8.0-1038.40
linux-image-aws-64k-6.8 6.8.0-1038.40
linux-image-aws-64k-lts-24.04 6.8.0-1038.40
linux-image-aws-lts-24.04 6.8.0-1038.40
linux-image-gcp-6.8 6.8.0-1039.41
linux-image-gcp-64k-6.8 6.8.0-1039.41
linux-image-gcp-64k-lts-24.04 6.8.0-1039.41
linux-image-gcp-lts-24.04 6.8.0-1039.41
linux-image-generic 6.8.0-83.83
linux-image-generic-6.8 6.8.0-83.83
linux-image-generic-64k 6.8.0-83.83
linux-image-generic-64k-6.8 6.8.0-83.83
linux-image-generic-lpae 6.8.0-83.83
linux-image-gke 6.8.0-1035.39
linux-image-gke-6.8 6.8.0-1035.39
linux-image-gkeop 6.8.0-1022.24
linux-image-gkeop-6.8 6.8.0-1022.24
linux-image-kvm 6.8.0-83.83
linux-image-lowlatency 6.8.0-83.83.1
linux-image-lowlatency-6.8 6.8.0-83.83.1
linux-image-lowlatency-64k 6.8.0-83.83.1
linux-image-lowlatency-64k-6.8 6.8.0-83.83.1
linux-image-oracle-6.8 6.8.0-1035.36
linux-image-oracle-64k-6.8 6.8.0-1035.36
linux-image-oracle-64k-lts-24.04 6.8.0-1035.36
linux-image-oracle-lts-24.04 6.8.0-1035.36
linux-image-virtual 6.8.0-83.83
linux-image-virtual-6.8 6.8.0-83.83
Ubuntu 22.04 LTS
linux-image-6.8.0-83-generic 6.8.0-83.83~22.04.1
linux-image-6.8.0-83-generic-64k 6.8.0-83.83~22.04.1
linux-image-6.8.0-83-lowlatency 6.8.0-83.83.1~22.04.1
linux-image-6.8.0-83-lowlatency-64k 6.8.0-83.83.1~22.04.1
linux-image-generic-6.8 6.8.0-83.83~22.04.1
linux-image-generic-64k-6.8 6.8.0-83.83~22.04.1
linux-image-generic-64k-hwe-22.04 6.8.0-83.83~22.04.1
linux-image-generic-hwe-22.04 6.8.0-83.83~22.04.1
linux-image-lowlatency-6.8 6.8.0-83.83.1~22.04.1
linux-image-lowlatency-64k-6.8 6.8.0-83.83.1~22.04.1
linux-image-lowlatency-64k-hwe-22.04 6.8.0-83.83.1~22.04.1
linux-image-lowlatency-hwe-22.04 6.8.0-83.83.1~22.04.1
linux-image-oem-22.04 6.8.0-83.83~22.04.1
linux-image-oem-22.04a 6.8.0-83.83~22.04.1
linux-image-oem-22.04b 6.8.0-83.83~22.04.1
linux-image-oem-22.04c 6.8.0-83.83~22.04.1
linux-image-oem-22.04d 6.8.0-83.83~22.04.1
linux-image-virtual-6.8 6.8.0-83.83~22.04.1
linux-image-virtual-hwe-22.04 6.8.0-83.83~22.04.1
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-7758-1
https://launchpad.net/bugs/2121515
Package Information:
https://launchpad.net/ubuntu/+source/linux/6.8.0-83.83
https://launchpad.net/ubuntu/+source/linux-aws/6.8.0-1038.40
https://launchpad.net/ubuntu/+source/linux-gcp/6.8.0-1039.41
https://launchpad.net/ubuntu/+source/linux-gke/6.8.0-1035.39
https://launchpad.net/ubuntu/+source/linux-gkeop/6.8.0-1022.24
https://launchpad.net/ubuntu/+source/linux-lowlatency/6.8.0-83.83.1
https://launchpad.net/ubuntu/+source/linux-oracle/6.8.0-1035.36
https://launchpad.net/ubuntu/+source/linux-hwe-6.8/6.8.0-83.83~22.04.1
https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-6.8/6.8.0-83.83.1~22.04.1
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