What’s Vulnerable › Vulnerabilities

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

• 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: 2023-08-16 · updated 2026-06-17
• Weakness: CWE-476

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.

Affected products

• Linux kernel: through 5.18.19

References

• https://access.redhat.com/security/cve/CVE-2023-4385
• https://bugzilla.redhat.com/show_bug.cgi?id=2219272
• https://github.com/torvalds/linux/commit/0d4837fdb796f99369cf7691d33de1b856bcaf1f
• https://access.redhat.com/security/cve/CVE-2023-4385
• https://bugzilla.redhat.com/show_bug.cgi?id=2219272
• https://github.com/torvalds/linux/commit/0d4837fdb796f99369cf7691d33de1b856bcaf1f

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