Vulnerability identifier: #VU83479

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-4732

CWE-ID: CWE-362

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a race condition caused by a BUG statement referencing pmd_t x within the pfn_swap_entry_to_page () function. A local user can exploit the race and crash the kernel.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel:

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External links
http://access.redhat.com/security/cve/CVE-2023-4732
http://bugzilla.redhat.com/show_bug.cgi?id=2236982
http://access.redhat.com/errata/RHSA-2023:6901
http://access.redhat.com/errata/RHSA-2023:7077

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.