CVE-2025-27577
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 OpenHarmony v5.0.3 and prior versions allow a local attacker arbitrary code execution in tcb through race condition.
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 race condition vulnerability in OpenHarmony v5.0.3 and prior versions allows a local attacker to achieve arbitrary code execution within the trusted computing base (tcb). The vulnerability stems from insufficient synchronization in a code path that the attacker can manipulate to win the race and inject/execute arbitrary code in a privileged context.
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<= 5.0.3CVSS 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
- High
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:H/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 OpenHarmony installation and versionRun 'grep -i openharmony /etc/os-release' or check system package management for OpenHarmony version (e.g., 'pkg dump' or equivalent command on the system)Affected if OpenHarmony is installed and version is 5.0.3 or lower (any version <= 5.0.3)
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Verify the trusted computing base (tcb) code pathsReview system audit logs and security event logs for any suspicious activity involving tcb operations, especially repeated attempts or unusual patterns that could indicate race condition probingAffected if Tcb-related code paths are exposed to unprivileged local users without proper access controls or monitoring
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Check for synchronization primitives in tcb modulesIf source code or binary analysis is possible, examine tcb-related modules for use of locks/mutexes/synchronization primitives around privileged code paths; otherwise, review system configuration for any security modules that should enforce such controlsAffected if The tcb code paths lack proper synchronization mechanisms or security controls that would prevent race condition exploitation
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Assess local access controls and attack surfaceReview local user accounts, group memberships, and any processes running with elevated privileges; check for unnecessary local accounts or services that could provide a foothold for a local attackerAffected if Local unprivileged accounts exist and have access to trigger or interact with the vulnerable tcb code path
A system is affected if it runs OpenHarmony version 5.0.3 or earlier AND has local unprivileged access that can reach the vulnerable tcb code path lacking proper synchronization.
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 dataUpgrade to a patched version of OpenHarmony when available. As an interim control, strictly limit local access to the system and minimize the attack surface for privilege escalation. Code-level fix involves adding proper synchronization primitives (locks/mutexes) around the vulnerable tcb code path to eliminate the race window.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-27577 — 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-2025-27577 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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