CVE-2023-4732

Public on 2023-09-20

Modified on 2024-02-03

Description

A flaw was found in the Linux Kernel's memory management subsytem. In this flaw, A task is exiting and releasing 2MB page in a vma (vm_area_struct) and hits the BUG statement in pfn_swap_entry_to_page() referencing pmd_t x. This may allow a local user to crash the Linux kernel.

Severity

Medium

See what this means

CVSS v3 Base Score

4.7

See breakdown

Affected Packages

Platform	Package	Release Date	Advisory	Status
Amazon Linux 1	kernel			Not Affected
Amazon Linux 2 - Core	kernel			Not Affected
Amazon Linux 2 - Kernel-5.15 Extra	kernel			Not Affected
Amazon Linux 2 - Kernel-5.4 Extra	kernel			Not Affected
Amazon Linux 2 - Kernel-5.10 Extra	kernel	2022-01-28	ALAS2KERNEL-5.10-2022-004	Fixed
Amazon Linux 2023	kernel			Not Affected

CVSS Scores

	Score Type	Score	Vector
Amazon Linux	CVSSv3	4.7	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD	CVSSv3	4.7	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2023-4732 Mitre: CVE-2023-4732