Linux Kernel Netfs Vulnerability in Cache Management

CVE-2026-80898

What is CVE-2026-80898?

A vulnerability in the Linux kernel involves the netfs module where the PG_private_2 flag may not be cleared appropriately during failure scenarios. Specifically, if an append operation to the cache fails, the folio is left in an incorrect state, impacting its reference management and cache writeback processes. This can lead to resource leaks and unstable kernel behavior, necessitating prompt action to mitigate potential risks.

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