Packages
- linux - Linux kernel
- linux-aws - Linux kernel for Amazon Web Services (AWS) systems
- linux-aws-5.15 - Linux kernel for Amazon Web Services (AWS) systems
- linux-aws-fips - Linux kernel for Amazon Web Services (AWS) systems with FIPS
- linux-fips - Linux kernel with FIPS
- linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
- linux-gcp-5.15 - Linux kernel for Google Cloud Platform (GCP) systems
- linux-gcp-fips - Linux kernel for Google Cloud Platform (GCP) systems with FIPS
- linux-gke - Linux kernel for Google Container Engine (GKE) systems
- linux-gkeop - Linux kernel for Google Container Engine (GKE) systems
- linux-hwe-5.15 - Linux hardware enablement (HWE) kernel
- linux-ibm - Linux kernel for IBM cloud systems
- linux-ibm-5.15 - Linux kernel for IBM cloud systems
- linux-intel-iot-realtime - Linux kernel for Intel IoT Real-time platforms
- linux-intel-iotg - Linux kernel for Intel IoT platforms
- linux-kvm - Linux kernel for cloud environments
- linux-nvidia - Linux kernel for NVIDIA systems
- linux-nvidia-tegra - Linux kernel for NVIDIA Tegra systems
- linux-nvidia-tegra-5.15 - Linux kernel for NVIDIA Tegra systems
- linux-nvidia-tegra-igx - Linux kernel for NVIDIA Tegra IGX systems
- linux-oracle - Linux kernel for Oracle Cloud systems
- linux-raspi - Linux kernel for Raspberry Pi systems
- linux-realtime - Linux kernel for Real-time systems
Details
It was discovered that the Linux kernel did not properly handle shared page
fragments during socket buffer operations, collectively known as Dirty
Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the
RxRPC networking subsystem when processing paged fragments. A local
attacker could use this to escalate privileges, or possibly escape a
container. (CVE-2026-43284, CVE-2026-43500)
It was discovered that a logic flaw existed in the XFRM ESP-in-TCP
subsystem in the Linux kernel when handling socket buffer fragments. This
flaw is known as Fragnesia. A local attacker could use this to escalate
privileges, or possibly escape a container. (CVE-2026-43503,
CVE-2026-46300)
Qualys discovered that a race condition existed in the ptrace subsystem of
the Linux kernel...
It was discovered that the Linux kernel did not properly handle shared page
fragments during socket buffer operations, collectively known as Dirty
Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the
RxRPC networking subsystem when processing paged fragments. A local
attacker could use this to escalate privileges, or possibly escape a
container. (CVE-2026-43284, CVE-2026-43500)
It was discovered that a logic flaw existed in the XFRM ESP-in-TCP
subsystem in the Linux kernel when handling socket buffer fragments. This
flaw is known as Fragnesia. A local attacker could use this to escalate
privileges, or possibly escape a container. (CVE-2026-43503,
CVE-2026-46300)
Qualys discovered that a race condition existed in the ptrace subsystem of
the Linux kernel when privileged processes are exiting. An unprivileged
local attacker could use this issue to expose sensitive information.
(CVE-2026-46333)
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:
- RDS protocol
Update instructions
After a standard system update you need to reboot your computer to make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
Reduce your security exposure
Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.
References
Related notices
Have additional questions?