CVE-2024-20820
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 · uneditedImproper input validation in bootloader prior to SMR Feb-2024 Release 1 allows local privileged attackers to cause an Out-Of-Bounds read.
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 confidenceImproper input validation in the bootloader allows a local privileged attacker to cause an out-of-bounds read. This could enable information disclosure or potentially facilitate further exploitation, though the attacker already requires elevated privileges.
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= 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
- High
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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 OS versionRun 'adb shell getprop ro.build.version.release' or go to Settings > About Phone > Android versionAffected if Version is 11.0, 12.0, or 13.0 specifically (exact match per the CVE advisory)
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Check bootloader versionRun 'adb shell getprop ro.bootloader' or 'adb reboot bootloader' to view bootloader screenAffected if Bootloader version is present and older than the Feb-2024 SMR patch level
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Check security patch levelRun 'adb shell getprop ro.build.version.security_patch'Affected if Patch level is before February 2024 (indicates vulnerable bootloader)
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Verify device model is SamsungRun 'adb shell getprop ro.product.model' or check Settings > About Phone > Model numberAffected if Device is a Samsung Galaxy or other Samsung Android device running the affected OS versions
Device is affected if it runs Android 11, 12, or 13 (exact versions) on Samsung hardware AND has a security patch level earlier than February 2024 SMR.
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 · scopedApply the SMR Feb-2024 Release 1 security patch or later Samsung firmware updates. Organizations should verify bootloader version compliance across managed devices.
Samsung Android devices with SMR Feb-2024 Release 1 or later (security patch level February 2024)
- 1. Check for available system updates on the Samsung device by navigating to Settings > Software Update.
- 2. Download and install the February 2024 Samsung Maintenance Release (SMR) or later security update.
- 3. Verify the security patch level after installation by going to Settings > About Phone > Software Information and checking that the Security patch level is February 2024 or later.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation8.0 h
- Implementation2.0 h
- Testing4.0 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 $4,960.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-20820 — 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-2024-20820 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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
- No spam, self-promotion, credentials, or personal data