CVE-2023-20761
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 ril, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07628604; Issue ID: ALPS07628582.
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 the Radio Interface Layer (ril), a missing bounds check allows an out-of-bounds write when processing certain operations. This memory corruption vulnerability can be exploited locally to escalate privileges to System level, though exploitation requires System execution privileges already. No user interaction is needed.
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= 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
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/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 'getprop ro.build.version.release' or check Settings > About Phone > Android versionAffected if The version returned is exactly 12.0 or 13.0
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Verify RIL component presenceCheck for /vendor/lib64/libril* or /system/lib64/libril* files on the device filesystemAffected if RIL library files exist on the device, indicating the component is present
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Confirm system-level execution contextRun 'id' or 'whoami' to check current process privileges; this vulnerability requires System-level execution alreadyAffected if Process is running with System UID (uid 1000) or root (uid 0) privileges
A device is affected if it runs Android 12.0 or 13.0, has the RIL component present, and the attacker already has System-level execution privileges to trigger the out-of-bounds write in the Radio Interface Layer.
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 vendor patch ALPS07628604 from the device/system vendor to add proper bounds validation in the ril component. Since this is a system-level radio component, a full system update may be required.
Apply the OEM security update containing MediaTek patch ALPS07628604 (typically included in subsequent Android security patch levels after the vulnerability disclosure)
- Contact your device OEM (Original Equipment Manufacturer) to verify if your device uses a MediaTek chipset and is affected by this vulnerability
- Check for and apply the latest Android security patch level from your device OEM that includes the MediaTek patch ALPS07628604
- Verify the installed security patch level includes the fix for CVE-2023-20761 (refer to MediaTek's monthly security bulletin)
- If your device is no longer supported by the OEM and does not receive security updates, consider upgrading to a device that receives regular security updates
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation6.0 h
- Testing8.0 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 $5,472.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-20761 — 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-2023-20761 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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