CVE-2024-47746: fuse: use exclusive lock when FUSE_I_CACHE_IO_MODE is set

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: 2024-10-21 · updated 2026-06-17
Weakness: CWE-667

Description

In the Linux kernel, the following vulnerability has been resolved: fuse: use exclusive lock when FUSE_I_CACHE_IO_MODE is set This may be a typo. The comment has said shared locks are not allowed when this bit is set. If using shared lock, the wait in `fuse_file_cached_io_open` may be forever.

Affected products

Linux kernel: from 6.9 before 6.10.13; from 6.11 before 6.11.2 — fixed in 6.10.13, 6.11.2

How to fix

Upgrade to a fixed version: Linux kernel 6.10.13, 6.11.2. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/2f3d8ff457982f4055fe8f7bf19d3821ba22c376
https://git.kernel.org/stable/c/4e181761ffec67307157a7e8a78d58ee4130cf00
https://git.kernel.org/stable/c/fa4890bd8237e5a1e7428acd7328729db2703b23

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