{"id":"CVE-2023-4732","title":"Kernel: race between task migrating pages and another task calling exit_mmap to release those same pages getting invalid opcode bug in include/linux/swapops.h","summary":"A flaw was found in pfn_swap_entry_to_page in memory management subsystem in the Linux Kernel. In this flaw, an attacker with a local user privilege may cause a denial of service problem due to a BUG statement referencing pmd_t x.","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-366"],"vendor":"Red Hat","product":"kernel-rt","affected":["kernel-rt (all versions)","kernel (all versions)","kernel (all versions)","kernel (all versions)","kernel (all versions)","kernel","kernel","kernel-rt","kernel","kernel-rt"],"published":"2023-10-03","updated":"2026-11-07","sourceUpdated":"2026-11-07T13:41:48.890Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-4732","references":[{"url":"https://access.redhat.com/errata/RHSA-2023:6901","label":"RHSA-2023:6901"},{"url":"https://access.redhat.com/errata/RHSA-2023:7077","label":"RHSA-2023:7077"},{"url":"https://access.redhat.com/errata/RHSA-2023:7539","label":"RHSA-2023:7539"},{"url":"https://access.redhat.com/errata/RHSA-2024:0412","label":"RHSA-2024:0412"},{"url":"https://access.redhat.com/security/cve/CVE-2023-4732"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2236982","label":"RHBZ#2236982"}],"tags":["cve.org"],"epss":0.00183,"epssPercentile":0.07934,"ingestedAt":"2026-11-07T14:18:21.468Z","slug":"CVE-2023-4732","body":"## Overview\n\nA flaw was found in pfn_swap_entry_to_page in memory management subsystem in the Linux Kernel. In this flaw, an attacker with a local user privilege may cause a denial of service problem due to a BUG statement referencing pmd_t x.\n\n## Affected\n\n- `kernel-rt (all versions)`\n- `kernel (all versions)`\n- `kernel (all versions)`\n- `kernel (all versions)`\n- `kernel (all versions)`\n- `kernel`\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.\n\n### Workarounds\n\nA possible workaround is disabling Transparent Hugepage","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}