Memory Management Vulnerability in Linux Kernel by Linux Foundation

CVE-2026-52930

What is CVE-2026-52930?

A vulnerability exists in the Linux kernel's handling of IPC shared memory, specifically in the orphan cleanup process. The function shm_destroy_orphaned() does not properly serialize access to shared memory structures under certain conditions. This oversight allows for potential race conditions, as the attached processes can modify the reference count while another thread checks for orphaned segments. To mitigate this, the shm_may_destroy() validation must occur under the correct locking mechanisms to prevent unauthorized deletion of shared memory segments before the adequate permissions are obtained. This fix reinforces the integrity of the memory management subsystem in Linux, minimizing risks associated with concurrent access to shared memory resources.

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