CVE-2022-50217: fuse: write inode in fuse_release()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-06-18 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: fuse: write inode in fuse_release() A race between write(2) and close(2) allows pages to be dirtied after fuse_flush -> write_inode_now(). If these pages are not flushed from fuse_release(), then there might not be a writable open file later. So any remaining dirty pages must be written back before the file is released. This is a partial revert of the blamed commit.

Affected products

Linux kernel: from 5.16 before 5.18.18; from 5.19 before 5.19.2 — fixed in 5.18.18, 5.19.2

How to fix

Upgrade to a fixed version: Linux kernel 5.18.18, 5.19.2. Check the vendor advisory for mitigations.

References

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