Local privilege escalation
Published Oct 13, 2026 · Updated Oct 13, 2026
A TOCTOU race in Microsoft Corporation Windows Subsystem for Linux allows local users to elevate privileges via unspecified vectors. The available CNA record does not identify the raced operation or the input whose state changes between checking and use. Exploitation requires authorized local access and a successful race; the record does not specify the resulting privilege level.
Summary
What happened
A TOCTOU race in Microsoft Corporation Windows Subsystem for Linux allows local users to elevate privileges via unspecified vectors. The available CNA record does not identify the raced operation or the input whose state changes between checking and use. Exploitation requires authorized local access and a successful race; the record does not specify the resulting privilege level.
The record
- CVE
- CVE-2026-85879
- Published
- Oct 13, 2026
- Updated
- Oct 13, 2026
- Vendor
- Microsoft Corporation
- Product
- Windows Subsystem for Linux
- Classifications
- CWE-367, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 13, 2026CVE publishedPublication date reported by the CVE source.
- Oct 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5.0.0.0 <2.7.10
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
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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