medium
4.7
CWE
366 362
Advisory Published
CVE Published
Updated

CVE-2023-4732: 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

First published: Sat Sep 02 2023(Updated: )

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.

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel<=5.13.19
Redhat Enterprise Linux=8.0
redhat/Kernel<5.14
5.14
Redhat Codeready Linux Builder=8.0
Redhat Codeready Linux Builder For Arm64=8.0_aarch64
Redhat Codeready Linux Builder For Power Little Endian=8.0_ppc64le
Redhat Enterprise Linux For Arm 64=8.0_aarch64
Redhat Enterprise Linux For Ibm Z Systems=8.0_s390x
Redhat Enterprise Linux For Power Little Endian=8.0_ppc64le
Redhat Enterprise Linux For Real Time=8.0
Redhat Enterprise Linux For Real Time For Nfv=8.0

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2023-4732?

    The severity of CVE-2023-4732 is medium with a CVSS score of 4.7.

  • What is the affected software for CVE-2023-4732?

    The affected software for CVE-2023-4732 includes the Linux Kernel version up to and including 5.13.19, and Redhat Enterprise Linux 8.0.

  • How can an attacker exploit CVE-2023-4732?

    An attacker with local user privilege can exploit CVE-2023-4732 by causing a denial of service problem through a BUG statement referencing pmd_t x in the Linux Kernel's memory management subsystem.

  • How can I fix CVE-2023-4732?

    To fix CVE-2023-4732, update your Linux Kernel to version 5.14 or apply the appropriate remedy provided by Redhat.

  • Where can I find more information about CVE-2023-4732?

    You can find more information about CVE-2023-4732 in the references provided: [1](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2236982#c1), [2](https://bugzilla.redhat.com/show_bug.cgi?id=2236982), [3](https://access.redhat.com/security/cve/CVE-2023-4732)

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