CVE-2019-2001
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 · uneditedThe permissions on /proc/iomem were world-readable. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android. Versions: Android kernel. Android ID: A-117422211.
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 · high confidenceThe /proc/iomem file in the Android kernel had world-readable permissions (likely 0444), allowing any local user to read memory mapped I/O region information. This exposes sensitive system memory layout details including device addresses and memory regions that could aid further exploitation.
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 dataall versionsCVSS 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
- High
- Integrity
- None
- Availability
- None
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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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Verify /proc/iomem existsRun `ls -la /proc/iomem` on the Android device to confirm the file is presentAffected if The file does not exist (not applicable to this CVE) - this check confirms the target exists for further inspection
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Check file permissions on /proc/iomemRun `ls -la /proc/iomem` and examine the permission bits in the first column (e.g., -r--r--r--)Affected if Permissions show world-readability (any combination of 'r' in positions 4,7,10) indicating 0444 or similar readable-by-all mode
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Test read access as non-root userAttempt to read the file using a non-root shell: `cat /proc/iomem` or `head /proc/iomem`Affected if The command succeeds and outputs memory region data without permission denied error, indicating any local user can read the file
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Identify exposed sensitive informationExamine the output of /proc/iomem for device addresses, memory regions, and hardware layout details that should be restrictedAffected if The output contains system memory mapped I/O regions, device addresses, or other sensitive memory layout information visible to all users
If /proc/iomem is readable by non-root users (world or group permissions include read), the Android device is affected by this vulnerability and exposes sensitive memory layout information to any local attacker.
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 dataFix the /proc/iomem permissions to restrict read access to root-only (e.g., 0400) in the kernel source code, then update Android devices with the patched kernel version.
- Consultation3.0 h
- Implementation6.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-2001 — 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-2019-2001 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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