{"id":"CVE-2023-4385","title":"Kernel: jfs: null pointer dereference in dbfree()","summary":"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.","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-476"],"vendor":"Red Hat","product":"kernel","affected":["kernel","kernel","kernel-rt","kernel","kernel-rt","kernel","kernel-rt"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2025-02-26T21:50:19.074150Z"},"published":"2023-08-16","updated":"2026-11-07","sourceUpdated":"2026-11-07T13:41:48.853Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-4385","references":[{"url":"https://access.redhat.com/security/cve/CVE-2023-4385"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2219272","label":"RHBZ#2219272"},{"url":"https://github.com/torvalds/linux/commit/0d4837fdb796f99369cf7691d33de1b856bcaf1f"}],"tags":["cve.org"],"epss":0.00233,"epssPercentile":0.14315,"ingestedAt":"2026-11-07T14:18:21.468Z","slug":"CVE-2023-4385","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `kernel`\n- `kernel`\n- `kernel-rt`\n- `kernel`\n- `kernel-rt`\n- `kernel`\n- `kernel-rt`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}