Security readout for executives and security teams
Plain-English summary
CVE-2023-21241 is an Android vulnerability that could let local code gain higher privileges. The issue is in Android's NFC component and is caused by an integer overflow leading to a possible out-of-bounds write. The source bundle does not show active exploitation or a CVSS score.
Executive priority
Treat this as a priority mobile endpoint patching item, especially for fleets with Android 11 through 13 devices. Urgency is elevated by local privilege escalation and no user interaction requirement, but the sources do not show active exploitation.
Technical view
Google describes a possible out-of-bounds write in rw_i93_send_to_upper of rw_i93.cc, caused by integer overflow. The impact is local escalation of privilege with no additional execution privileges and no user interaction required. Affected Android versions are 11, 12, 12L, and 13.
Likely exposure
Exposure is most likely on Android 11, 12, 12L, and 13 devices that have not received the relevant July 2023 Android security update or OEM equivalent. The issue is tied to Android's NFC system code.
Exploitation context
The provided sources indicate local escalation of privilege and no required user interaction. They do not provide evidence of remote exploitation, public exploit availability, or inclusion in CISA KEV.
Researcher notes
The evidence identifies the vulnerable function and class of memory corruption but lacks CVSS, CWE, exploit detail, and runtime preconditions. Analysis should focus on Android NFC code provenance, patch presence, and device/OEM update status rather than speculative exploitability.
Mitigation direction
- Apply Android security updates that include the July 2023 bulletin fixes.
- Confirm OEM firmware updates include CVE-2023-21241 remediation.
- Prioritize managed Android devices running versions 11 through 13.
- Check vendor guidance before assuming NFC disabling is sufficient.
Validation and detection
- Inventory Android devices by OS version and patch level.
- Verify July 2023 or later security patch status where applicable.
- Review OEM advisories for CVE-2023-21241 inclusion.
- Track unmanaged or unsupported Android devices separately.
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-2023-21241 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
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.