CVE-2026-20462
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 Telephony, there is a possible memory corruption due to a heap buffer overflow. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11006447; Issue ID: MSV-7871.
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 confidenceHeap buffer overflow vulnerability in the Telephony component allowing local privilege escalation from System privilege to higher privileges without user interaction. This is a memory corruption issue in Telephony that could be exploited by an attacker who already has System-level access.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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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Identify Telephony component presenceLocate telephony-related processes or services on the system. Common process names include 'telephony', 'rild', 'phone', 'telecom', or similar. Use commands like 'ps -A | grep -i telecom' or check system logs for telephony module loading.Affected if Telephony component is not found on the system (not applicable)
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Determine Telephony component versionRetrieve the version of the installed Telephony component. This may be found in system settings under 'About Phone' > 'Software Info', via 'getprop' command on Android systems, or by checking the telephony service binary version. Compare against any available version information from the vendor.Affected if The installed version matches or precedes the patched version ALPS11006447, or no version information is available to confirm otherwise.
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Verify System privilege access controlsReview current user privilege levels and System-level access configurations. Check which users or processes hold System-level privileges on the device or server using 'whoami', 'id', or privilege enumeration tools.Affected if Multiple users or processes have System-level access beyond the device owner, increasing exploitability.
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Monitor telephony process behaviorInspect running telephony processes for unusual memory allocation patterns, unexpected child processes, or privilege escalation attempts. Use process monitoring tools to observe system calls and memory usage of telephony services.Affected if Telephony processes exhibit abnormal behavior such as unexpected memory growth, crashes, or attempts to spawn elevated child processes.
A user is affected if the Telephony component is present with a version at or before ALPS11006447, and the system allows System-level access to multiple entities or shows anomalous telephony process behavior.
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 the vendor patch ALPS11006447. Until the patch is available, restrict System privilege access and monitor for indicators of compromise in telephony processes.
- Consultation4.0 h
- Implementation8.0 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-2026-20462 — 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-2026-20462 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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