CVE-2021-0424
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 memory management driver, there is a possible system crash due to a missing bounds check. This could lead to local denial of service with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS05403499; Issue ID: ALPS05393787.
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 confidenceA missing bounds check in the memory management driver allows a local attacker to cause a system crash (denial of service) without requiring any additional privileges or user interaction. The vulnerability stems from inadequate input validation when handling memory operations in the driver.
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= 10.0= 11.0CVSS 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 versionNavigate to Settings > About Phone (or About Device) and look at the Android version field. Alternatively, run 'getprop ro.build.version.release' in ADB shell.Affected if The version listed is exactly 10.0 or 11.0 (not newer patch levels)
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Identify memory management driver presenceIn ADB shell, run 'getprop | grep mem' or check /sys/module/ for memory management related modules (e.g., 'ls /sys/module/' and look for memory, mm, or ion related entries).Affected if A memory management driver module is loaded on the device
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Review system crash logs for memory driver failuresRun 'adb logcat -d | grep -i "memory"' or 'adb logcat -d | grep -i "mm"' in a terminal to search for crash logs mentioning memory management driver issues.Affected if Recent crash logs show kernel panics or driver faults related to memory management operations
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Check for unexpected system crashesReview /sys/fs/pstore/ (if available) or run 'adb shell dmesg' to look for kernel oops or panic messages, particularly those mentioning memory management subsystem.Affected if Kernel logs show unexplained crashes or memory management driver faults without user-initiated actions
A device is affected if it runs Android 10.0 or 11.0 and has experienced unexplained system crashes or kernel panics that reference the memory management driver.
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.
From vendor dataApply patch ALPS05403499 which adds proper bounds checking to the memory management driver. Until the patch is available, monitor for unexpected system crashes potentially linked to memory driver operations.
- Consultation3.0 h
- Implementation6.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,992.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-0424 — 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-2021-0424 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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