What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 4.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-10-03 · updated 2026-06-17
• Weakness: CWE-366

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

• Linux kernel: through 5.13.19
• 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
• Red Hat Enterprise Linux: 8.0
• 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

References

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

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