CVE-2025-62220
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 · uneditedHeap-based buffer overflow in Windows Subsystem for Linux GUI allows an unauthorized attacker to execute code over a network.
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 heap-based buffer overflow vulnerability exists in the Windows Subsystem for Linux (WSL) GUI component. This memory corruption flaw allows an unauthenticated attacker to achieve remote code execution by sending specially crafted network traffic to exploit the overflow, potentially giving them execution privileges on the affected system.
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< 2.6.2CVSS 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.
-
Verify WSL is installedRun 'wsl --version' or 'wsl -l -v' in Command Prompt or PowerShell to list installed WSL instances and their versionsAffected if WSL is installed and the version shown is lower than 2.6.2
-
Check WSL kernel versionRun 'wsl cat /proc/version' inside a WSL distribution to view the kernel version, or check via 'wsl --status'Affected if The kernel version corresponds to a WSL release earlier than 2.6.2
-
Confirm GUI component is in useDetermine if WSLg (Windows Subsystem for Linux GUI) is enabled by checking for the presence of wslg.exe process or by verifying GUI applications can launch from WSLAffected if The WSL GUI feature (WSLg) is enabled and being used on the system
-
Assess network exposureReview firewall rules and network configuration to determine if the WSL VM network interfaces are accessible from untrusted or external networksAffected if WSL network interfaces are exposed to untrusted networks, allowing external attackers to reach the vulnerable component
You are affected if WSL with GUI support (WSLg) is installed with a version lower than 2.6.2 and the system is network-accessible to untrusted parties.
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.
dbcve · scoped2.6.2
Apply Microsoft security patches for Windows Subsystem for Linux as they become available. Ensure WSL instances are updated to the latest version and consider network segmentation to limit exposure to untrusted networks until the patch is applied.
Windows Subsystem for Linux version 2.6.2 or later
- Open PowerShell or Command Prompt as Administrator
- Run 'wsl --version' to check the current WSL version
- Run 'wsl --update' to update WSL to the latest version
- Run 'wsl --version' again to confirm the update to version 2.6.2 or later
- If automatic update doesn't work, run 'wsl --install' to perform a clean installation of the latest WSL version
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation3.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,680.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-62220 — 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-2025-62220 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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
- No spam, self-promotion, credentials, or personal data