Security readout for executives and security teams
Plain-English summary
CVE-2021-0476 is an Android Bluetooth-related flaw that could let a local attacker gain higher privileges on affected devices. The sources say exploitation needs no user interaction and no additional execution privileges, but they do not provide CVSS scoring or active exploitation evidence.
Executive priority
Treat this as a patch governance issue for Android fleets. It is local rather than remote, but the privilege-escalation impact and no-user-interaction condition justify prioritizing unpatched or unsupported devices.
Technical view
The issue is a possible use-after-free in FindOrCreatePeer of btif_av.cc caused by a race condition. Android identifies it as A-169252501. The stated impact is local escalation of privilege on Android 9, 10, and 11. No CWE, CVSS vector, proof of exploitation, or detailed fix mechanics are provided in the supplied sources.
Likely exposure
Exposure is most likely on Android 9, Android 10, or Android 11 devices that have not received the relevant May 2021 Android security bulletin fixes from Google or the device OEM.
Exploitation context
The CVE record describes local privilege escalation with no user interaction required. The source bundle does not cite CISA KEV listing, public exploitation, exploit code, or campaign use, so active exploitation is not established.
Researcher notes
Evidence is limited to the CVE text and Android bulletin reference. Key missing details include CVSS scoring, exact vulnerable code path conditions, patch diff details, and exploitation telemetry. Do not assume active exploitation from the supplied sources.
Mitigation direction
- Apply OEM updates that include Android Security Bulletin 2021-05-01 fixes.
- Prioritize affected Android 9, 10, and 11 devices.
- Replace or isolate devices that can no longer receive security updates.
- Check vendor guidance for model-specific patch availability and deployment notes.
Validation and detection
- Inventory managed Android devices by OS version and security patch level.
- Confirm affected devices received the May 2021 bulletin fix or OEM equivalent.
- Identify unsupported Android 9, 10, and 11 devices still in use.
- Review MDM compliance reports for missing or delayed Android security updates.
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-2021-0476 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/2021-05-01CVE 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.