CVE-2025-26503
📋 TL;DR
This vulnerability allows an attacker to cause memory corruption by providing a crafted argument to a system call. This affects systems running vulnerable versions of Wind River VxWorks where an attacker has local access or can trigger the system call remotely. Memory corruption can lead to system instability or potential code execution.
💻 Affected Systems
- Wind River VxWorks
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or persistent backdoor installation.
Likely Case
System crash or denial of service due to memory corruption, potentially requiring reboot.
If Mitigated
Limited impact with proper memory protection mechanisms and exploit mitigations in place.
🎯 Exploit Status
Exploitation requires understanding of system call interface and memory layout; no public exploit available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Wind River advisory for specific patched versions.
Vendor Advisory: https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2025-26503
Restart Required: No
Instructions:
1. Review Wind River advisory for affected versions. 2. Apply the recommended patch or update to a fixed version. 3. Test in non-production environment first. 4. Deploy to production systems.
🔧 Temporary Workarounds
Restrict System Call Access
VxWorksLimit access to vulnerable system calls through access controls or service hardening.
Configure VxWorks security policies to restrict untrusted access to system calls.
🧯 If You Can't Patch
- Implement strict input validation for all system call arguments.
- Deploy memory protection mechanisms like ASLR and stack canaries if supported.
🔍 How to Verify
Check if Vulnerable:
Check system version against Wind River's affected version list in the advisory.Check Version:
Use VxWorks shell command 'uname -a' or check version in system configuration.Verify Fix Applied:
Verify system version matches patched version from Wind River advisory.📡 Detection & Monitoring
Log Indicators:
- System crashes, memory access violations, or unexpected process termination logs.
Network Indicators:
- Unusual system call patterns or traffic to system call interfaces.
SIEM Query:
Search for events indicating memory corruption or system instability in VxWorks logs.