Security readout for executives and security teams
Plain-English summary
CVE-2021-0558 is an Android 11 flaw that could let an attacker remotely disclose information if a user interacts with malicious content. The source does not show active exploitation or privilege escalation. Business urgency is mainly around Android 11 fleet exposure and whether devices received the June 2021 Android/Pixel security fixes.
Executive priority
Handle as a routine but real mobile security update item. It is not supported by KEV evidence, but remote information disclosure on Android 11 warrants confirmation that affected devices received vendor security updates.
Technical view
The issue is in fillMainDataBuf in pvmp3_framedecoder.cpp. The CVE describes a possible out-of-bounds read caused by a heap buffer overflow, leading to remote information disclosure. Exploitation requires user interaction and no additional execution privileges. No CVSS vector, CWE mapping, or exploit details are provided in the bundle.
Likely exposure
Exposure appears limited to Android 11 devices, based on the CVE product and version data. The reference is the Android Pixel June 2021 security bulletin, but the bundle does not provide OEM-specific fixed builds or non-Pixel coverage details.
Exploitation context
The provided evidence says remote information disclosure is possible with user interaction. KEV status is false, and no cited source in the bundle states active exploitation. Treat exploit availability and real-world targeting as unconfirmed from these sources.
Researcher notes
Evidence is sparse. The bundle provides the affected version, vulnerable function, impact, and user-interaction requirement, but no CVSS, CWE, patch build, or exploit status. Avoid assuming broader Android versions or active exploitation without additional vendor evidence.
Mitigation direction
- Check Android and OEM guidance for CVE-2021-0558 fixed security patch levels.
- Prioritize updating Android 11 devices that process untrusted media content.
- Inventory remaining Android 11 devices and confirm their current security patch level.
- Use mobile device management controls to enforce minimum supported Android patch levels.
Validation and detection
- Identify Android 11 devices in managed mobile inventory.
- Confirm each device security patch level against Android or OEM guidance.
- Review vulnerability scanner findings for CVE-2021-0558 on Android assets.
- Verify unsupported or unpatched devices have compensating controls or retirement plans.
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-2021-0558 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.