CVE-2025-54626 – This CVE describes a use-after-free vulnerabili... (How to Fix)

Q: What is the severity of CVE-2025-54626?

CVE-2025-54626 has a CVSS score of 4.4 (MEDIUM). This CVE describes a use-after-free vulnerability in the cjwindow module where a pointer is not properly cleared after memory is freed. Successful exploitation could cause application crashes or unexpected behavior. This affects systems using the vulnerable cjwindow module.

📋 TL;DR

This CVE describes a use-after-free vulnerability in the cjwindow module where a pointer is not properly cleared after memory is freed. Successful exploitation could cause application crashes or unexpected behavior. This affects systems using the vulnerable cjwindow module.

💻 Affected Systems

Products:

Huawei products using cjwindow module

Versions: Specific versions not detailed in reference; check Huawei advisory

Operating Systems: OS-specific details not provided

Default Config Vulnerable: ⚠️ Yes

Notes: Vulnerability exists in default configurations of affected products

📦 What is this software?

Harmonyos by Huawei

View all CVEs affecting Harmonyos →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Application crash leading to denial of service or potential code execution if combined with other vulnerabilities

🟠

Likely Case

Application instability, crashes, or unexpected behavior in affected functions

🟢

If Mitigated

Minimal impact with proper memory protections and exploit mitigations enabled

🌐 Internet-Facing: LOW - Requires local access or specific conditions to exploit

🏢 Internal Only: MEDIUM - Could affect internal application stability if exploited

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Exploitation requires specific conditions to trigger the use-after-free scenario

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Check Huawei security bulletin for specific fixed versions

Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2025/8/

Restart Required: No

Instructions:

1. Review Huawei security bulletin. 2. Identify affected products/versions. 3. Apply vendor-provided patches. 4. Test functionality after patching.

🔧 Temporary Workarounds

Memory protection hardening

all

Enable ASLR and other memory protection mechanisms

🧯 If You Can't Patch

Isolate affected systems from untrusted networks
Implement strict access controls and monitoring

🔍 How to Verify

Check if Vulnerable:

Check system against Huawei security bulletin for affected products/versions

Check Version:

System-specific command to check software version (consult product documentation)

Verify Fix Applied:

Verify patch installation and test cjwindow module functionality

📡 Detection & Monitoring

Log Indicators:

Application crashes
Memory access violation errors
Unexpected termination of cjwindow-related processes

Network Indicators:

No specific network indicators for this local vulnerability

SIEM Query:

Search for application crash events related to cjwindow module or memory access violations

📊 Metadata

CVE ID: CVE-2025-54626

CVSS v3 Score: 4.4 (MEDIUM)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

CWE: CWE-416

EPSS Score: 0.01% exploit probability (1.1th percentile)

Published: August 6, 2025

Last Updated: December 8, 2025

🔗 References

https://consumer.huawei.com/en/support/bulletin/2025/8/ Vendor Advisory

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🔗 Related Vulnerabilities

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