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CVE Record

CVE-2023-21255: In multiple functions of binder.c, there is a possible memory corruption due to a use after free.

In multiple functions of binder.c, there is a possible memory corruption due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2023-21255 is a use-after-free memory corruption issue in Android kernel Binder code. A local attacker could potentially gain higher privileges without user interaction. The source bundle does not provide CVSS, affected version ranges, or confirmed exploitation.

Executive priority

Treat as high priority for Android or vendor-confirmed affected systems, especially endpoints running untrusted apps. The lack of KEV listing lowers evidence of emergency exploitation, but kernel local privilege escalation can materially increase compromise impact.

Technical view

The CVE identifies multiple binder.c functions where use-after-free could corrupt memory and enable local escalation of privilege. Android published the issue in the July 2023 security bulletin and links to a kernel/common change. Debian and NetApp also published advisories, indicating downstream tracking.

Likely exposure

Primary exposure is Android systems using affected Android kernel Binder code. Debian and NetApp references show broader vendor assessment, but the bundle does not identify exact affected Debian, NetApp, or Android product versions.

Exploitation context

The CVE states exploitation is local, requires no additional execution privileges, and does not require user interaction. It is not listed as CISA KEV in the bundle, and no cited source confirms active exploitation.

Researcher notes

Evidence is thin: no CVSS, CWE, affected version ranges, or exploit observations are provided in the bundle. Focus validation on vendor bulletins, the referenced kernel/common change, and downstream advisory mappings rather than assumptions about all Binder implementations.

Mitigation direction

  • Apply relevant Android security updates from July 2023 or later where applicable.
  • Review Debian DSA-5480 and LTS guidance for affected Linux packages.
  • Review NetApp advisory NTAP-20240119-0010 for product-specific status.
  • Check vendor guidance before applying unsupported kernel changes.
  • Prioritize systems where untrusted local code can run.

Validation and detection

  • Inventory Android and Android-derived kernel deployments.
  • Confirm installed security patch level includes the July 2023 bulletin fixes.
  • Map Debian systems against DSA-5480 and the LTS announcement.
  • Check NetApp assets against the cited NetApp advisory.
  • Verify vendor update records for CVE-2023-21255 coverage.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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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CVE-2023-21255 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
GoogleAndroidAndroid kernelunaffected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.