Privilege escalation via unchecked wlandata encoding
Published Dec 16, 2022 · Updated Apr 17, 2025
Out-of-bounds write in rild_exynos in Google Cloud Android allows local users with System privileges to elevate privileges without interaction. The encode operation in wlandata.cpp inadequately validates input before writing beyond the intended buffer bounds. Exploitation requires existing System execution privileges on an affected device and can corrupt memory to obtain higher privileges.
Summary
What happened
Out-of-bounds write in rild_exynos in Google Cloud Android allows local users with System privileges to elevate privileges without interaction. The encode operation in wlandata.cpp inadequately validates input before writing beyond the intended buffer bounds. Exploitation requires existing System execution privileges on an affected device and can corrupt memory to obtain higher privileges.
The record
- CVE
- CVE-2022-42521
- Published
- Dec 16, 2022
- Updated
- Apr 17, 2025
- Vendor
- Google Cloud
- Product
- Android
- Classifications
- CWE-787, T1068
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Dec 16, 2022CVE publishedPublication date reported by the CVE source.
- Apr 17, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=Android kernel
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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