What is CVE-2023-4385?

CVE-2023-4385 is a medium-severity vulnerability in Linux Kernel, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2023-08-16.

How severe is CVE-2023-4385?

Medium severity. CVSS v3 base score is 5.5 out of 10.

NULL pointer dereference in Linux Kernel

CVE-2023-4385

A NULL pointer dereference flaw was found in dbFree in fs/jfs/jfs_dmap.c in the journaling file system (JFS) in the Linux Kernel. This issue may allow a local attacker to crash the system due to a missing sanity check.

Published 2023-08-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (12.9th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 12.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

access.redhat.com/security/cve/CVE-2023-4385 (Third Party Advisory, vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking, Third Party Advisory, Issue Tracking)
github.com/torvalds/linux/commit/0d4837fdb796f99369cf7691d33de1b856bcaf1f (Patch)

Frequently asked questions

What is CVE-2023-4385?: CVE-2023-4385 is a medium-severity vulnerability in Linux Kernel, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2023-08-16.
How severe is CVE-2023-4385?: Medium severity. CVSS v3 base score is 5.5 out of 10.