CVE-2023-21136
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedIn multiple functions of JobStore.java, there is a possible way to cause a crash on startup due to improper input validation. This could lead to local denial of service with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-12 Android-12L Android-13Android ID: A-246542285
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceIn multiple functions of Android's JobStore.java (part of the JobScheduler framework), improper input validation can cause a crash during system startup when jobs are being loaded or processed. This leads to a local denial of service where the device may fail to start properly or experience crashes related to job scheduling services.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 11.0= 12.0= 12.1= 13.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Check Android versionGo to Settings > About Phone > Android version, or run 'getprop ro.build.version.release' via ADB shellAffected if The Android version is 11.0, 12.0, 12.1, or 13.0 exactly (not later security patch versions that may contain fixes)
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Verify build fingerprintRun 'getprop ro.build.fingerprint' via ADB shell to confirm the exact build being runAffected if The build shows Android 11, 12, 12.1, or 13 without a later security patch level (patched versions are 14 and above for this CVE)
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Check for JobScheduler crash logsRun 'logcat -d | grep -i jobstore' or 'logcat -d | grep -i jobscheduler' via ADB shell to look for crashes during bootAffected if Crash logs show JobStore.java related exceptions or ANRs occurring during system startup when jobs are loaded
A device is affected if it runs Android 11.0, 12.0, 12.1, or 13.0 specifically and exhibits JobStore/JobScheduler crashes during boot sequences.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scopedThis vulnerability requires a framework-level patch from Google (AOSP) to add proper input validation in JobStore.java. End users should apply available Android security updates. For custom ROMs or AOSP-based systems, developers must modify the JobStore.java source to validate inputs before processing jobs and job parameters.
Android-13 with 2023-06-01 security patch level or later (or corresponding patch level for Android 11/12/12L)
- Check your Android device's current security patch level in Settings > Security > Security update
- Verify if your device has received the June 2023 security patch level (2023-06-01) or later
- If not updated, check for available system updates from your device manufacturer
- Apply any pending Android system updates to obtain the security fix
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-21136 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-21136 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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