Linux Kernel zram Vulnerability Affects Data Handling

CVE-2026-46089

What is CVE-2026-46089?

A vulnerability has been identified in the Linux kernel's zram module that affects how partial discard requests are handled. When executing the 'blkdiscard -p' command with partial requests, the system does not process these requests correctly, leading to a scenario where operations can hang indefinitely. This occurs because the zram module prematurely exits without marking the request as complete, preventing the process from concluding. The resolution involves implementing an immediate call to ensure proper completion of the I/O operations, thereby preventing the system from stalling.

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