CVE-2025-27577

Local code execution via TCB race condition

Published Aug 11, 2025 · Updated Aug 11, 2025

Race condition in liteos_a in OpenHarmony 5.0.3 through 5.0.3.x allows local users to execute arbitrary code in the TCB component. OpenHarmony identifies the affected locus only as TCB and does not disclose which shared resource lacks synchronization or which racing operation corrupts state. Low privileges and no user interaction are required; successful exploitation crosses a security boundary, exposes data, and enables service interruption.

CVSS severity8.4
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in liteos_a in OpenHarmony 5.0.3 through 5.0.3.x allows local users to execute arbitrary code in the TCB component. OpenHarmony identifies the affected locus only as TCB and does not disclose which shared resource lacks synchronization or which racing operation corrupts state. Low privileges and no user interaction are required; successful exploitation crosses a security boundary, exposes data, and enables service interruption.

The record

CVE
CVE-2025-27577
Published
Aug 11, 2025
Updated
Aug 11, 2025
Vendor
OpenHarmony
Product
OpenHarmony
Classifications
CWE-362, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=v5.0.3 <=v5.0.3.x

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

OpenHarmony · OpenHarmonyversion=v5.0.3 <=v5.0.3.x

Published CVSS scores

8.4OpenHarmonyCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H
7.0NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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