# CVE-2023-4732

## Summary

- **CVE ID:** CVE-2023-4732
- **Severity:** MEDIUM
- **CVSS Score:** 4.7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-366
- **Published:** Oct 3, 2023
- **Last Modified:** Mar 13, 2026

## Description

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.

## Affected Products

- Red Hat — Red Hat Enterprise Linux 8 (0:4.18.0-513.5.1.rt7.307.el8_9)
- Red Hat — Red Hat Enterprise Linux 8 (0:4.18.0-513.5.1.el8_9)
- Red Hat — Red Hat Enterprise Linux 8.6 Extended Update Support (0:4.18.0-372.87.1.el8_6)
- Red Hat — Red Hat Enterprise Linux 8.8 Extended Update Support (0:4.18.0-477.36.1.el8_8)
- Red Hat — Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 (0:4.18.0-372.87.1.el8_6)

## References

- [CNA](https://access.redhat.com/errata/RHSA-2023:6901)
- [CNA](https://access.redhat.com/errata/RHSA-2023:7077)
- [CNA](https://access.redhat.com/errata/RHSA-2023:7539)
- [CNA](https://access.redhat.com/errata/RHSA-2024:0412)
- [CNA](https://access.redhat.com/security/cve/CVE-2023-4732)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2236982)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.01%
- **EPSS Percentile:** 2.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._