Security readout for executives and security teams
Plain-English summary
CVE-2021-0945 is an Android SoC vulnerability in the PowerVR kernel driver. A missing bounds check can allow heap memory overwrite and may let a local attacker gain higher privileges. The source bundle does not provide CVSS, exact device models, or public exploitation evidence.
Executive priority
Treat this as a high-priority mobile platform patching issue where affected Android SoC devices exist. Business urgency depends on fleet exposure and update availability. Lack of public exploitation evidence lowers immediacy, but kernel-level privilege escalation raises impact.
Technical view
The flaw is CWE-787 in _PMRCreate of the PowerVR kernel driver. PhysmemNewRamBackedPMR can trigger a heap overwrite because bounds checking is missing. Reported impact is local escalation of privilege without additional execution privileges or user interaction.
Likely exposure
Exposure is likely limited to Android devices whose SoC build includes the affected PowerVR kernel driver. The provided sources identify Android SoC generally, but do not list OEMs, chipsets, device models, or affected Android versions.
Exploitation context
The vulnerability is local privilege escalation, not a remote entry point. The source bundle says user interaction is not required. It is not listed as KEV, and no cited source in the bundle states active exploitation.
Researcher notes
Key gaps are CVSS, exact affected versions, and OEM/device mapping. Analysis should focus on Android SoC builds containing the PowerVR kernel driver and whether the June 2023 Android bulletin fix reached deployed devices.
Mitigation direction
- Check the Android June 2023 security bulletin and OEM advisories for applicable fixes.
- Apply vendor-provided Android security updates to affected devices.
- Prioritize devices with PowerVR GPU drivers or affected Android SoC builds.
- If updates are unavailable, reduce exposure on high-risk shared or unmanaged devices.
Validation and detection
- Inventory Android devices by OEM, SoC, GPU driver, and security patch level.
- Confirm whether devices received the June 2023 Android security bulletin fixes.
- Review vendor release notes for CVE-2021-0945 coverage.
- Track unmanaged or unsupported Android devices separately for risk acceptance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-0945 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://source.android.com/security/bulletin/2023-06-01CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.