Local privilege escalation via unchecked page unmapping
Published Nov 8, 2022 · Updated May 1, 2025
Out-of-bounds write in the PowerVR GPU kernel driver for Android SoC allows local users to escalate privileges without user interaction. MMU_UnmapPages omits a bounds check while unmapping pages, allowing a caller-controlled range to write beyond the intended memory boundary. Local low-privileged access to the driver is required, and successful exploitation grants elevated privileges without additional execution rights.
Summary
What happened
Out-of-bounds write in the PowerVR GPU kernel driver for Android SoC allows local users to escalate privileges without user interaction. MMU_UnmapPages omits a bounds check while unmapping pages, allowing a caller-controlled range to write beyond the intended memory boundary. Local low-privileged access to the driver is required, and successful exploitation grants elevated privileges without additional execution rights.
The record
- CVE
- CVE-2021-1050
- Published
- Nov 8, 2022
- Updated
- May 1, 2025
- Vendor
- Imagination Technologies
- Product
- PowerVR GPU
- Classifications
- CWE-787, T1404
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Nov 8, 2022CVE publishedPublication date reported by the CVE source.
- May 1, 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 SoC
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
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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