Local privilege escalation via unchecked allocation size
Published Apr 19, 2023 · Updated Feb 5, 2025
Integer overflow in the PowerVR kernel driver for Android SoC allows local users to escalate privileges through out-of-bounds heap access. PVRSRVBridgePhysmemNewRamBackedLockedPMR omits a size check before computing a RAM-backed allocation size, so an overflowing value permits heap access beyond the allocated buffer. Exploitation requires local low-privileged code on an affected device, needs no user interaction, and can obtain elevated execution privileges.
Summary
What happened
Integer overflow in the PowerVR kernel driver for Android SoC allows local users to escalate privileges through out-of-bounds heap access. PVRSRVBridgePhysmemNewRamBackedLockedPMR omits a size check before computing a RAM-backed allocation size, so an overflowing value permits heap access beyond the allocated buffer. Exploitation requires local low-privileged code on an affected device, needs no user interaction, and can obtain elevated execution privileges.
The record
- CVE
- CVE-2021-0876
- Published
- Apr 19, 2023
- Updated
- Feb 5, 2025
- Vendor
- Imagination Technologies
- Product
- PowerVR GPU
- Classifications
- CWE-190, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 19, 2023CVE publishedPublication date reported by the CVE source.
- Feb 5, 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?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
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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