{"id":"CVE-2023-6915","title":"Kernel: null pointer dereference vulnerability in ida_free in lib/idr.c","summary":"A Null pointer dereference problem was found in ida_free in lib/idr.c in the Linux Kernel. This issue may allow an attacker using this library to cause a denial of service problem due to a missing check at a function return.","severity":"medium","cvss":6.2,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-476"],"vendor":"Red Hat","product":"kernel-rt","affected":["kernel-rt (all versions)","kernel (all versions)","kernel (all versions)","kernel (all versions)","kernel","kernel","kernel-rt","kernel-rt (all versions)"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2025-06-17T20:13:23.064257Z"},"published":"2024-01-15","updated":"2026-11-05","sourceUpdated":"2026-11-05T11:37:55.195Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-6915","references":[{"url":"https://access.redhat.com/errata/RHSA-2024:2394","label":"RHSA-2024:2394"},{"url":"https://access.redhat.com/errata/RHSA-2024:2950","label":"RHSA-2024:2950"},{"url":"https://access.redhat.com/errata/RHSA-2024:3138","label":"RHSA-2024:3138"},{"url":"https://access.redhat.com/security/cve/CVE-2023-6915"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2254982","label":"RHBZ#2254982"},{"url":"https://github.com/torvalds/linux/commit/af73483f4e8b6f5c68c9aa63257bdd929a9c194a"}],"tags":["cve.org"],"epss":0.00278,"epssPercentile":0.20316,"ingestedAt":"2026-11-05T21:36:00.814Z","slug":"CVE-2023-6915","body":"## Overview\n\nA Null pointer dereference problem was found in ida_free in lib/idr.c in the Linux Kernel. This issue may allow an attacker using this library to cause a denial of service problem due to a missing check at a function return.\n\n## Affected\n\n- `kernel-rt (all versions)`\n- `kernel (all versions)`\n- `kernel (all versions)`\n- `kernel (all versions)`\n- `kernel`\n- `kernel`\n- `kernel-rt`\n- `kernel-rt (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nMitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":34.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}