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Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-85879

Time-of-check time-of-use (toctou) race condition in Windows Subsystem for Linux allows an authorized attacker to elevate privileges locally.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.002

EPSS Ranking 12.5%

CVSS Severity

CVSS v3 Score 7.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85879

Products affected by CVE-2026-85879

Microsoft » Windows Subsystem For Linux » Version: 2.0.0

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.0.0
Microsoft » Windows Subsystem For Linux » Version: 2.0.1

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.0.1
Microsoft » Windows Subsystem For Linux » Version: 2.0.11

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.0.11
Microsoft » Windows Subsystem For Linux » Version: 2.0.12

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.0.12
Microsoft » Windows Subsystem For Linux » Version: 2.0.14

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.0.14
Microsoft » Windows Subsystem For Linux » Version: 2.0.15

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.0.15
Microsoft » Windows Subsystem For Linux » Version: 2.0.2

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.0.2
Microsoft » Windows Subsystem For Linux » Version: 2.0.3

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.0.3
Microsoft » Windows Subsystem For Linux » Version: 2.0.4

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.0.4
Microsoft » Windows Subsystem For Linux » Version: 2.0.5

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.0.5
Microsoft » Windows Subsystem For Linux » Version: 2.0.6

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.0.6
Microsoft » Windows Subsystem For Linux » Version: 2.0.7

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.0.7
Microsoft » Windows Subsystem For Linux » Version: 2.0.8

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.0.8
Microsoft » Windows Subsystem For Linux » Version: 2.0.9

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.0.9
Microsoft » Windows Subsystem For Linux » Version: 2.1.0

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.1.0
Microsoft » Windows Subsystem For Linux » Version: 2.1.1

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.1.1
Microsoft » Windows Subsystem For Linux » Version: 2.1.3

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.1.3
Microsoft » Windows Subsystem For Linux » Version: 2.1.4

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.1.4
Microsoft » Windows Subsystem For Linux » Version: 2.1.5

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.1.5
Microsoft » Windows Subsystem For Linux » Version: 2.2.1

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.2.1
Microsoft » Windows Subsystem For Linux » Version: 2.2.2

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.2.2
Microsoft » Windows Subsystem For Linux » Version: 2.2.3

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.2.3
Microsoft » Windows Subsystem For Linux » Version: 2.2.4

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.2.4
Microsoft » Windows Subsystem For Linux » Version: 2.3.11

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.3.11
Microsoft » Windows Subsystem For Linux » Version: 2.3.12

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.3.12
Microsoft » Windows Subsystem For Linux » Version: 2.3.13

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.3.13
Microsoft » Windows Subsystem For Linux » Version: 2.3.14

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.3.14
Microsoft » Windows Subsystem For Linux » Version: 2.3.17

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.3.17
Microsoft » Windows Subsystem For Linux » Version: 2.3.21

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.3.21
Microsoft » Windows Subsystem For Linux » Version: 2.3.22

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.3.22
Microsoft » Windows Subsystem For Linux » Version: 2.3.24

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.3.24
Microsoft » Windows Subsystem For Linux » Version: 2.3.25

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.3.25
Microsoft » Windows Subsystem For Linux » Version: 2.3.26

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.3.26
Microsoft » Windows Subsystem For Linux » Version: 2.4.10

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.4.10
Microsoft » Windows Subsystem For Linux » Version: 2.4.11

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.4.11
Microsoft » Windows Subsystem For Linux » Version: 2.4.12

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.4.12
Microsoft » Windows Subsystem For Linux » Version: 2.4.13

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.4.13
Microsoft » Windows Subsystem For Linux » Version: 2.4.4

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.4.4
Microsoft » Windows Subsystem For Linux » Version: 2.4.5

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.4.5
Microsoft » Windows Subsystem For Linux » Version: 2.4.8

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.4.8
Microsoft » Windows Subsystem For Linux » Version: 2.4.9

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.4.9
Microsoft » Windows Subsystem For Linux » Version: 2.5.1

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.5.1
Microsoft » Windows Subsystem For Linux » Version: 2.5.10

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.5.10
Microsoft » Windows Subsystem For Linux » Version: 2.5.4

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.5.4
Microsoft » Windows Subsystem For Linux » Version: 2.5.6

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.5.6
Microsoft » Windows Subsystem For Linux » Version: 2.5.7

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.5.7
Microsoft » Windows Subsystem For Linux » Version: 2.5.8

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.5.8
Microsoft » Windows Subsystem For Linux » Version: 2.5.9

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.5.9
Microsoft » Windows Subsystem For Linux » Version: 2.6.0

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.6.0
Microsoft » Windows Subsystem For Linux » Version: 2.6.1

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.6.1
Microsoft » Windows Subsystem For Linux » Version: 2.6.2

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.6.2
Microsoft » Windows Subsystem For Linux » Version: 2.6.3

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.6.3
Microsoft » Windows Subsystem For Linux » Version: 2.7.1

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.7.1
Microsoft » Windows Subsystem For Linux » Version: 2.7.3

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.7.3
Microsoft » Windows Subsystem For Linux » Version: 2.7.5

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.7.5
Microsoft » Windows Subsystem For Linux » Version: 2.7.7

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.7.7
Microsoft » Windows Subsystem For Linux » Version: 2.7.8

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.7.8
Microsoft » Windows Subsystem For Linux » Version: 2.7.9

cpe:2.3:a:microsoft:windows_subsystem_for_linux:2.7.9

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Vulnerability Details CVE-2026-85879

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