CVE-2023-4732 Race condition in Red Hat Enterprise Linux 6

What is CVE-2023-4732?

CVE-2023-4732 is a medium-severity vulnerability in Linux kernel, published on 3 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-362, CWE-366

Which versions are affected by CVE-2023-4732?

It affects 10 products.

Products include Linux kernel, Redhat Codeready Linux Builder, Redhat Codeready Linux Builder for Arm64, Redhat Codeready Linux Builder for Power Little Endian, Redhat Enterprise Linux, Redhat Enterprise Linux for Arm 64 and 4 more.

How do I fix CVE-2023-4732?

Apply the vendor's patch.

Is CVE-2023-4732 being exploited?

There is no known exploitation of CVE-2023-4732 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2023-4732, GHSA-c9mw-vpxm-p7rq, UBUNTU-CVE-2023-4732.