CVE-2026-53328
Description
A flaw was found in the Linux kernel's sched_ext component. When systemd's user manager interacts with subtree_control while sched_ext is loaded, a warning can be triggered. This occurs due to a mismatch in how cgroup and css identities are handled during task migration, potentially leading to system instability or a local denial of service.
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Crash, Exit, or Restart
NULL pointer dereferences usually result in the failure of the process unless exception handling (on some platforms) is available and implemented. Even when exception handling is being used, it can still be very difficult to return the software to a safe state of operation.
Integrity,Confidentiality
Technical Impact: Execute Unauthorized Code or Commands; Read Memory; Modify Memory
In rare circumstances, when NULL is equivalent to the 0x0 memory address and privileged code can access it, then writing or reading memory is possible, which may lead to code execution.
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