CVE-2023-20925
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 setUclampMinLocked of PowerSessionManager.cpp, there is a possible way to corrupt memory due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-236674672References: N/A
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 confidenceUse-after-free vulnerability in the setUclampMinLocked function of PowerSessionManager.cpp in the Android kernel. The function accesses memory after it has been freed, leading to memory corruption that can be exploited for local privilege escalation without requiring additional execution privileges or user interaction.
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
- 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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Check the running Android kernel versionRun 'uname -r' or check /proc/version on the Android device to obtain the kernel version stringAffected if The kernel version is older than the version that includes the A-236674672 patch (patch date unknown; compare against vendor release notes for the fix)
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Verify PowerSessionManager kernel module or component is loadedCheck /sys/kernel/debug/power_session or look for 'PowerSessionManager' in /proc/kallsyms or kernel config: 'grep -i POWER_SESSION_MANAGER /boot/config-$(uname -r)'Affected if The PowerSessionManager component is present and the kernel lacks the A-236674672 patch
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Confirm the setUclampMinLocked function exists in the kernelSearch for the function symbol: 'grep setUclampMinLocked /proc/kallsyms' or examine the kernel image for the exported symbolAffected if The setUclampMinLocked symbol is present in the running kernel
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Check Android security patch levelRun 'getprop ro.build.version.security_patch' or check Settings > About Phone > Android security patch levelAffected if The security patch level is earlier than the month when A-236674672 was released (vendor release notes specify the patch date)
The system is affected if the Android kernel lacks the A-236674672 fix and the setUclampMinLocked function in PowerSessionManager is present in the running kernel.
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 Android kernel security patch for A-236674672 once available through the standard Android update mechanism. This is a kernel-level fix requiring vendor-supplied updates.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA8.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $12,352.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-20925 — 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-2023-20925 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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