Security readout for executives and security teams
Plain-English summary
CVE-2021-0699 is an Android SoC kernel privilege escalation issue. A local attacker could potentially use it to gain kernel-level control on an affected Android device. The public sources do not show active exploitation or broad technical detail.
Executive priority
Treat as high priority for Android fleets handling business data. Kernel privilege escalation can turn a lower-level local compromise into full device compromise, but urgency should be driven by affected-device inventory and patch status.
Technical view
The CVE describes a missing bounds check in HTBLogKM causing a possible out-of-bounds write. Android rates it high with CVSS 7.8: local access, low complexity, low privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to Android devices using affected Android SoC builds. Real fleet exposure depends on OEM firmware, SoC vendor integration, and whether Android security updates covering the October 2022 bulletin were applied.
Exploitation context
The sources support local escalation of privilege in the kernel with no user interaction required. They do not identify remote exploitation, public exploit availability, or active exploitation; the CVE is not listed as KEV in the supplied bundle.
Researcher notes
Public detail is sparse: HTBLogKM and “TBD” are not enough to identify exact reachable code paths from the bundle. Avoid assuming exploitability beyond the stated local kernel escalation and validate through vendor patch metadata.
Mitigation direction
- Review the Android October 2022 security bulletin and OEM guidance.
- Apply applicable Android, OEM, and SoC vendor security updates.
- Prioritize managed Android devices with outdated security patch levels.
- Replace or isolate unsupported devices that cannot receive fixes.
Validation and detection
- Inventory Android devices and record model, SoC, OS version, and patch level.
- Check OEM advisories for CVE-2021-0699 coverage.
- Verify EMM or MDM compliance data for October 2022 or later patches.
- Confirm unsupported devices are removed from sensitive workflows.
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
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Open ATT&CK lookupCVE-2021-0699 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/2022-10-01CVE 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.