CVE-2022-20421: Use After Free
First published: Mon Oct 03 2022(Updated: )
In binder_inc_ref_for_node of binder.c, there is a possible way to corrupt memory due to a use after free. 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-239630375References: Upstream kernel
Credit: security@android.com security@android.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Google Android | ||
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =11.0 | |
| Google Android | ||
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.11-1 6.12.12-1 |
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Reference Links
- https://source.android.com/security/bulletin/2022-10-01
- https://www.debian.org/security/2022/dsa-5257
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html
- https://launchpad.net/bugs/cve/CVE-2022-20421
- https://android.googlesource.com/kernel/common/+/19bb609b45fb
- https://source.android.com/docs/security/bulletin/2022-10-01 (Advisory)
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-20421
- https://nvd.nist.gov/vuln/detail/CVE-2022-20421
- https://security-tracker.debian.org/tracker/CVE-2022-20421
- https://ubuntu.com/security/CVE-2022-20421
- https://git.kernel.org/linus/a0e44c64b6061dda7e00b7c458e4523e2331b739
Frequently Asked Questions
What is the severity of CVE-2022-20421?
CVE-2022-20421 is a medium severity vulnerability that allows local escalation of privilege due to a use after free error.
How do I fix CVE-2022-20421?
To mitigate CVE-2022-20421, update your system to the latest kernel versions specified by your Linux distribution.
Who is affected by CVE-2022-20421?
CVE-2022-20421 affects users of Android and specific Debian Linux versions, particularly 10.0 and 11.0.
What types of devices are impacted by CVE-2022-20421?
CVE-2022-20421 impacts devices running the Google Android kernel and certain Debian-based systems.
Is user interaction necessary to exploit CVE-2022-20421?
No, user interaction is not required to exploit CVE-2022-20421, making it potentially more dangerous.
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