CVE-2026-88149

Double free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to…

Risk score: 44/100
CVSS: 7.0 v3.1
Exploit chance (30 days): 0.2%
Published: 13 Oct 2026

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What to know

What it is: Double free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Affected: See advisory
Fix: Apply the vendor's security update; see the linked advisory.
Exploitation: No known exploitation

Why it is Yellow

CVSS 7.0 high

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88149

Original description

Double free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

Last activity 13 Oct 2026. Patch Forecast updates every hour.