An incorrect setting of UXN bits within mmu_flags_to_s1_pte_attr lead to privileged executable pages being mapped as executable from an unprivileged context. This can be leveraged by an attacker to bypass executability restrictions of kernel-mode pages from user-mode. An incorrect setting of PXN bits within mmu_flags_to_s1_pte_attr lead to unprivileged executable pages being mapped as executable from a privileged context. This can be leveraged by an attacker to bypass executability restrictions of user-mode pages from kernel-mode. Typically this allows a potential attacker to circumvent a mitigation, making exploitation of potential kernel-mode vulnerabilities easier. We recommend updating kernel beyond commit 7d731b4e9599088ac3073956933559da7bca6a00 and rebuilding.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: Google

Published: 2022-01-18T14:10:10

Updated: 2024-08-03T18:44:14.082Z

Reserved: 2021-01-05T00:00:00

Link: CVE-2021-22566

cve-icon Vulnrichment

Updated: 2024-08-03T18:44:14.082Z

cve-icon NVD

Status : Modified

Published: 2022-01-18T14:15:07.920

Modified: 2024-05-29T20:15:10.247

Link: CVE-2021-22566

cve-icon Redhat

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