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Medium 6.3Published Jul 14, 2026
CVE-2026-57973Windows Subsystem for Linux (WSL2) Kernel Tampering Vulnerability
Updated under an hour ago ()
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It affects Microsoft Windows Subsystem for Linux (WSL2) and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Time-of-check time-of-use (toctou) race condition in Windows Subsystem for Linux allows an authorized attacker to perform tampering locally.
- CVSS
- 6.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
- Weakness (CWE)
- CWE-367
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Windows Subsystem for Linux (WSL2) microsoft:windows_subsystem_for_linux_wsl2 (from the name) | 5.0.0.0 builds before 2.7.10 | CNA record |
microsoft windows_subsystem_for_linux microsoft:windows_subsystem_for_linux | before 2.7.10 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57973vendor-advisory, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.