CVE-2025-20705
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 monitor_hang, there is a possible memory corruption due to use after free. 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: ALPS09989078; Issue ID: MSV-3964.
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 use-after-free vulnerability exists in the monitor_hang component, allowing a local attacker who already has System privileges to escalate to higher privileges. The vulnerability involves memory corruption where a freed memory region is accessed after being deallocated, leading to potential arbitrary code execution. No user interaction is required for 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 data= 2.6= 13.0= 14.0= 15.0= 16.0= 19.07.0= 21.02.0CVSS 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
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/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 your product and versionRun 'cat /etc/os-release' or check system info to determine if you are running Yocto 2.6, Android 13.0-16.0, or Openwrt 19.07.0/21.02.0Affected if Your product version matches exactly one of the listed affected versions (Yocto 2.6, Android 13.0/14.0/15.0/16.0, or Openwrt 19.07.0/21.02.0)
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Determine if monitor_hang component is presentSearch for the monitor_hang binary or module on the system using 'find / -name *monitor_hang* 2>/dev/null' or check kernel modules if applicableAffected if The monitor_hang component exists on the system and is loaded or accessible
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Check current user privilege levelRun 'id' or 'whoami' to determine your current privilege levelAffected if You have System-level or root privileges, as exploitation requires an attacker with System access to escalate further
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Verify monitor_hang process is runningUse 'ps aux | grep monitor_hang' or check running processes for the monitor_hang componentAffected if The monitor_hang process is actively running on the system
You are affected if you are running one of the listed product versions AND the monitor_hang component is present and running on your system with System-level access available.
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 ALPS09989078 to address the use-after-free in monitor_hang. Since exploitation requires System-level access, ensure strict access controls and monitoring for privilege escalation attempts.
- Consultation3.0 h
- Implementation6.0 h
- Testing5.0 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 $4,752.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-20705 — 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-2025-20705 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
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