CVE-2023-4385 Kernel: jfs: null pointer dereference in dbfree()

What is CVE-2023-4385?

CVE-2023-4385 is a medium-severity vulnerability in Linux kernel, published on 16 Aug 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-476

Which versions are affected by CVE-2023-4385?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-4385?

Apply the vendor's patch.

Is CVE-2023-4385 being exploited?

There is no known exploitation of CVE-2023-4385 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-27958, DEBIAN-CVE-2023-4385, GHSA-r4x5-77vp-hgvg, UBUNTU-CVE-2023-4385.