CVE-2023-4732: Kernel: race between task migrating pages and another task calling exit_mma

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

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Red Hat Red Hat Enterprise Linux 8

Default version status: affected

0:4.18.0-513.5.1.rt7.307.el8_9 to < *unaffected

Red Hat Red Hat Enterprise Linux 8

Default version status: affected

0:4.18.0-513.5.1.el8_9 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support

Default version status: affected

0:4.18.0-372.87.1.el8_6 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support

Default version status: affected

0:4.18.0-477.36.1.el8_8 to < *unaffected