Security readout for executives and security teams
Plain-English summary
CVE-2021-0884 is a high-severity Android SoC issue in a PowerVR kernel driver path. A local attacker could exploit an integer overflow to access heap memory out of bounds and potentially gain higher privileges. No user interaction is required, but the attacker needs local access or code execution on the device.
Executive priority
Treat this as a high-priority mobile fleet patching issue, especially for Android devices outside current security patch levels. It is not a remote internet-facing vulnerability, but it can materially increase impact if malware or a malicious app lands on an affected device.
Technical view
The flaw is a missing size check in PVRSRVBridgePhysmemImportSparseDmaBuf in the PowerVR kernel driver. The CVE describes a CWE-190 integer overflow that can cause out-of-bounds heap access. CVSS 3.1 is 7.8 with local attack vector, low complexity, low privileges, no UI, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to Android SoC builds using the affected PowerVR kernel driver component. The public source bundle does not identify specific device models, OEMs, chipsets, or Android release branches, so asset owners must map exposure through OEM firmware and Android bulletin coverage.
Exploitation context
The provided sources do not report active exploitation, and this CVE is not marked as CISA KEV. The issue is locally exploitable with low privileges and no user interaction, making it most relevant after an attacker already has app-level or local code execution on an affected device.
Researcher notes
Evidence is limited to Android and CVE metadata. The sources identify the vulnerable function, bug class, Android ID A-270393454, Android SoC scope, and CVSS vector, but do not provide affected model lists, exploit availability, or detailed patch mechanics.
Mitigation direction
- Apply OEM Android security updates that include the April 2023 Android Security Bulletin coverage.
- Check device vendor advisories for PowerVR or Android SoC firmware updates.
- Prioritize managed Android devices with delayed or missing security patch levels.
- Restrict untrusted app installation on devices pending vendor updates.
- Retire or isolate devices that cannot receive applicable OEM fixes.
Validation and detection
- Inventory Android devices and record vendor, model, SoC, and security patch level.
- Confirm whether OEM firmware includes April 2023 Android bulletin fixes.
- Ask OEMs to confirm applicability where PowerVR driver exposure is unclear.
- Review mobile device management data for outdated Android security patch levels.
- Track remediation evidence by device model and firmware build.
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-190: 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-2021-0884 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
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://source.android.com/security/bulletin/2023-04-01CVE 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.
Integer Overflow or Wraparound
Integer Overflow or Wraparound represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.