CVE-2021-22566
Incorrect mapping of Executable bits in Fuchsia Kernel
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Incorrect mapping of Executable bits in Fuchsia Kernel
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.
Reserved 2021-01-05 | Published 2022-01-18 | Updated 2024-08-03 | Assigner Googlefuchsia.googlesource.com/...9599088ac3073956933559da7bca6a00
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