CVE-2021-0942

Description

The path in this case is a little bit convoluted. The end result is that via an ioctl an untrusted app can control the ui32PageIndex offset in the expression:sPA.uiAddr = page_to_phys(psOSPageArrayData->pagearray[ui32PageIndex]);With the current PoC this crashes as an OOB read. However, given that the OOB read value is ending up as the address field of a struct I think i seems plausible that this could lead to an OOB write if the attacker is able to cause the OOB read to pull an interesting kernel address. Regardless if this is a read or write, it is a High severity issue in the kernel.Product: AndroidVersions: Android SoCAndroid ID: A-238904312

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.06%
Vendor Advisory android.com
Affected: n/a Android
Published at:
Updated at:

References

Link Tags
https://source.android.com/security/bulletin/2022-09-01 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-0942?
CVE-2021-0942 has been scored as a critical severity vulnerability.
How to fix CVE-2021-0942?
To fix CVE-2021-0942, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-0942 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-0942 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-0942?
CVE-2021-0942 affects n/a Android.
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