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CVE-2023-21017

ROUTINE

Telemetry drift only. No threshold crossed and no authority ruling changed.

CVE record, CISA KEV and EPSS as of 2026-10-18.

CVEs like this one computed, by meaning

What to do now held facts and links

  1. No fix version is held. The CNA's first reference is the place to look: source.android.com
  2. Record your decision, dated and frozen with today's evidence: patch by a date · mitigated by a compensating control · deferred · accepted the risk · not affected
  3. Check your version against the ranges this record publishes.

What it is stated by the CNA

In InstallStart of InstallStart.java, there is a possible way to change the installer package name due to an improper input validation. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-236687884

weakness
Elevation of privilege
affected
n/a Android
published ranges
google android 13.0
fixed in
No fix version in held sources.
fixed by package (from OSV advisories)
platform/frameworks/base (Android): 13:2023-03-01 PUB-A-236687884
assigned by
google_android
published
2023-03-24

check us source.android.com

Exploit code held, dated

exploit code
None held in the PoC-in-GitHub feed. A public repository changes this brief.

What moved held, dated

dateEPSSevent
25 Mar 20230.00042
17 Mar 20250.00012scoring model v2025.03.14
29 Mar 20250.00015
30 Mar 20250.00012
18 Nov 20250.00015
21 Nov 20250.00012
17 Dec 20250.00014
18 Jan 20260.00015
6 Apr 20260.00017
8 Apr 20260.00031
9 Apr 20260.00039
10 Apr 20260.00037
11 Apr 20260.00016
15 Jun 20260.00095scoring model v2026.06.15

14 observations held. A step marked with a scoring model moved because the measurement was replaced, not because the vulnerability changed.

Outside the record researched, cited

This section reads the record's references and adds cited findings from outside it. It needs an account. Everything above is held facts and is complete without it.

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What would change this brief held, dated

CISA KEV
Not listed in the catalogue we hold. A listing changes this brief.
exploit probability
0.00 on 2026-06-15 (FIRST's EPSS, a probability and not evidence of exploitation). Next band line: 10% (0.10). Crossing a line changes this brief.
fix
No fix version is held. One published by the CNA or OSV changes this brief.

Watch this CVE What counts as a move

How to check this

Every value above is held with two dates: when it was true upstream (as_of) and when we recorded it (tx_from). Re-derive the exploit probability as it stood on any date:

SELECT value, source, source_version, as_of, tx_from
FROM volatile_valid_as_of('CVE-2023-21017', '2026-10-30T23:59:59.999999Z', now());