CVE-2023-4389

Name: CVE-2023-4389
Creator: NVD / NIST
Published: 2023-08-16T19:15:10.163+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 0.25%

Last modified Jun 17, 2026

CVE-2023-4389 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. A flaw was found in btrfs_get_root_ref in fs/btrfs/disk-io.c in the btrfs filesystem in the Linux Kernel due to a double decrement of the reference count. This issue may allow a local attacker with user privilege to crash the system or may lead to leaked internal kernel information.. EPSS estimates a 0.25% chance of exploitation in the next 30 days.

Description

A flaw was found in btrfs_get_root_ref in fs/btrfs/disk-io.c in the btrfs filesystem in the Linux Kernel due to a double decrement of the reference count. This issue may allow a local attacker with user privilege to crash the system or may lead to leaked internal kernel information.

Metrics

CVSS 3.1

7.1/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

EPSS Probability

0.25%

16.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 5.7, < 5.10.112
Linux	Linux Kernel	>= 5.11, < 5.15.35
Linux	Linux Kernel	>= 5.16, < 5.17.4

References

https://access.redhat.com/security/cve/CVE-2023-4389Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2219271Issue Tracking, Third Party Advisory
https://patchwork.kernel.org/project/linux-btrfs/patch/20220324134454.15192-1-baijiaju1990@gmail.com/Patch, Vendor Advisory
https://access.redhat.com/security/cve/CVE-2023-4389Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2219271Issue Tracking, Third Party Advisory
https://patchwork.kernel.org/project/linux-btrfs/patch/20220324134454.15192-1-baijiaju1990@gmail.com/Patch, Vendor Advisory

Timeline

Published: Aug 16, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-4389?

How severe is CVE-2023-4389?

CVE-2023-4389 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.

How do I fix CVE-2023-4389?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-4389?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST