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Unscored CVE-2021-39802 EUVD-2021-26159GHSA-pw5p-gx3j-x3xv

In change_pte_range of mprotect.c , there is a possible way to make a shared mmap writable due to a permissions bypass. This could lead to …

Published Apr 12, 2022 · Updated Aug 4, 2024 · Assigned by google_android

Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.3 Package: linux-aws-5.8 Package: linux-azure Package: linux-azure-5.11 Package: linux-azure-5.3 Package: linux-azure-5.8 Package: linux-azure-edge Package: linux-gcp Package: linux-gcp-5.11 Package: linux-gcp-5.3 Package: linux-gcp-5.8 Package: linux-gke-4.15 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.8 Package: linux-hwe-edge Package: linux-intel-5.13 Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.6 Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.3 Package: linux-oracle-5.8 Package: linux-raspi2 Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.8 Platform: Android Ecosystem: Ubuntu

Description

In change_pte_range of mprotect.c , there is a possible way to make a shared mmap writable due to a permissions bypass. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-213339151References: Upstream kernel

Affected products

VendorProductAffectedFixed
— Android Android kernel —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu 20.04 LTS linux-riscv +17 No fix yet —
Ubuntu 18.04 LTS linux-gcp +12 No fix yet —
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —

References