Security readout for executives and security teams
Plain-English summary
CVE-2021-0563 is an Android 11 issue in a media encoding component. A heap buffer overflow can cause an out-of-bounds read, potentially exposing local information. The public record says exploitation needs no extra privileges and no user interaction, but it does not provide a CVSS score or evidence of active exploitation.
Executive priority
Treat this as a maintenance-priority mobile security update, not an emergency based on current evidence. The main business risk is information exposure on unpatched Android 11 devices, especially unsupported or unmanaged endpoints.
Technical view
The issue is in ih264e_fmt_conv_422i_to_420sp within ih264e_fmt_conv.c. The CVE describes a possible out-of-bounds read caused by heap buffer overflow, with local information disclosure impact on Android 11. The source bundle does not include CWE mapping, CVSS vectors, exploit details, or broader affected-version evidence.
Likely exposure
Exposure is limited to Android 11 systems using affected Android media encoder code. The bundle names Android 11 only, so do not assume other Android versions, downstream forks, or non-Android products are affected without vendor confirmation.
Exploitation context
The CVE record says exploitation requires local context, no additional execution privileges, and no user interaction. The bundle does not cite CISA KEV listing, public exploitation, proof-of-concept code, or exploitation in the wild.
Researcher notes
Evidence is sparse: one Android source reference, no CVSS, no CWE, and no KEV signal. Analysis should stay tied to Android 11 and the named function unless additional vendor or code review evidence expands the affected surface.
Mitigation direction
- Apply Android or Pixel security updates covering the June 2021 bulletin where applicable.
- Confirm OEM firmware includes the relevant Android security fix for A-172908358.
- Prioritize unsupported Android 11 devices for upgrade or replacement planning.
- Check vendor guidance before assuming a compensating control fully mitigates this issue.
Validation and detection
- Inventory Android 11 devices and their Android security patch levels.
- Verify Pixel or OEM bulletin coverage for CVE-2021-0563 or Android ID A-172908358.
- Review mobile device management data for devices missing June 2021 or later security updates.
- For custom Android builds, confirm patched media encoder source is integrated.
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.
CVE-2021-0563 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/pixel/2021-06-01CVE reference · x_refsource_MISC
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.