CVE-2023-4394: Memory leak in btrfs_get_dev_args_from_path()

Severity: medium (CVSS 6.0 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: 2023-08-17 · updated 2026-06-17
Weakness: CWE-400

Description

A use-after-free flaw was found in btrfs_get_dev_args_from_path in fs/btrfs/volumes.c in btrfs file-system in the Linux Kernel. This flaw allows a local attacker with special privileges to cause a system crash or leak internal kernel information

Affected products

Linux kernel: before 6.0; 6.0-rc1, 6.0-rc2 — fixed in 6.0

How to fix

Upgrade to a fixed version: Linux kernel 6.0. Check the vendor advisory for mitigations.

References

https://access.redhat.com/security/cve/CVE-2023-4394
https://bugzilla.redhat.com/show_bug.cgi?id=2219263
https://patchwork.kernel.org/project/linux-btrfs/patch/20220815151606.3479183-1-r33s3n6@gmail.com/
https://access.redhat.com/security/cve/CVE-2023-4394
https://bugzilla.redhat.com/show_bug.cgi?id=2219263
https://patchwork.kernel.org/project/linux-btrfs/patch/20220815151606.3479183-1-r33s3n6@gmail.com/

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