afd.sys

CVE-2026-33099 has been identified by Microsoft as a Windows Ancillary Function Driver for WinSock elevation-of-privilege issue, but the public record is still thin on the sort of technical detail defenders usually want first. That combination matters: Microsoft is signaling that the flaw is...

Microsoft’s CVE-2026-33100 advisory for the Windows Ancillary Function Driver for WinSock is another reminder that the most operationally important Windows flaws are often the ones that never generate splashy headlines. The public record currently describes a use-after-free issue that lets an...

Microsoft’s CVE-2026-26177 entry is exactly the kind of Windows security advisory that defenders need to read twice: it is an elevation-of-privilege issue in the Ancillary Function Driver for WinSock layer, and Microsoft’s own confidence metric is designed to tell you how certain the company is...

Understanding CVE-2026-26173 and Microsoft’s AFD.sys Confidence Metric Microsoft’s CVE-2026-26173 entry points to a familiar but still dangerous Windows pattern: a kernel-adjacent privilege-escalation issue in the Ancillary Function Driver for WinSock (AFD.sys), the long-lived networking...

Microsoft has published a security update for CVE-2025-60719, an untrusted pointer dereference in the Windows Ancillary Function Driver for WinSock (afd.sys) that can be abused by a local, authenticated attacker to gain elevated privileges; administrators should treat this as a high-priority...

Microsoft has recorded CVE-2025-62213 as a use‑after‑free elevation‑of‑privilege in the Windows Ancillary Function Driver for WinSock (afd.sys), a kernel‑mode networking component, and administrators are urged to apply the vendor's security update immediately to close a local post‑compromise...

Microsoft’s security channels added CVE-2025-62217 to the public record on November 11, 2025: the flaw is a race condition in the Windows Ancillary Function Driver for WinSock (afd.sys) that can be abused by an authenticated local actor to elevate privileges on affected Windows hosts. Background...

Microsoft’s security channels added CVE-2025-58714 to the record this week: an elevation‑of‑privilege weakness in the Windows Ancillary Function Driver for WinSock (the afd.sys stack) that — if left unpatched on an affected host — lets a locally authorized attacker raise their process context to...

Microsoft’s advisory identifies a vulnerability in the Windows Ancillary Function Driver for WinSock (afd.sys) that can be triggered locally to escalate privileges — described on the vendor page as a buffer overflow in the WinSock ancillary driver — and administrators must treat this as a...

Microsoft’s Security Update Guide entry for CVE-2025-53718 describes a use‑after‑free (UAF) flaw in the Windows Ancillary Function Driver for WinSock (AFD.sys) that can be triggered by a locally authorized user to obtain elevated privileges on affected Windows hosts — a kernel‑level...

Microsoft’s Security Response Guide flags a null-pointer dereference in the Windows Ancillary Function Driver for WinSock (AFD.sys) that, when reached by a local, authorized user, can be weaponized into an elevation‑of‑privilege to SYSTEM — a high‑impact kernel vulnerability that demands...

A use‑after‑free vulnerability in the Windows Ancillary Function Driver for WinSock (AFD.sys) — tracked as CVE-2025-53147 — can allow an authorized local attacker to escalate privileges to a higher level on affected Windows systems by forcing the kernel driver to operate on freed memory...

Microsoft’s advisory confirms that a null pointer dereference in the Windows Ancillary Function Driver for WinSock (AFD.sys) can be triggered by a locally authorized attacker to elevate privileges to SYSTEM, creating a high-impact local elevation-of-privilege (EoP) risk for affected Windows...

A use‑after‑free vulnerability in the Windows Ancillary Function Driver for WinSock (AFD.sys), tracked as CVE-2025-53137, can be abused by an authorized local user to escalate privileges to SYSTEM on affected Windows hosts — a high‑impact kernel vulnerability that follows a string of similar AFD...

Title: What sysadmins need to know about the WinSock AFD race-condition EoP entry you sent (CVE-2025-53134) — situation, risk, and what to do now Executive summary You sent the MSRC URL for CVE-2025-53134 (Windows Ancillary Function Driver for WinSock — race condition / improper synchronization...

A recently published Microsoft advisory warns that CVE-2025-49762 — a race-condition flaw in the Windows Ancillary Function Driver for WinSock (AFD.sys) — can allow a locally authorized attacker to elevate privileges by exploiting concurrent execution using a shared resource with improper...

The cybersecurity landscape for Windows users is continually evolving, with both defenders and attackers persistently engaged in a race for dominance. One of the latest and most critical pieces of this ongoing battle is CVE-2025-32709—a newly disclosed use-after-free vulnerability in the Windows...

Memory test has come out clear. Not sure which software is creating BSOD. Any help would be greatly appreciated. The system is a DELL XPS.

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The BSOD also shows errors from other sources than afd.sys, but recently it has started after hibernate also. In most cases the BSOD happens when playing youtube videos for more than 10 minutes, and it starts with the audio sounding distorted and looping and then it crashes. The BSOD does not...