Researcher Publishes Windows Defender 0-Day ‘BlueHammer’ LPE Proof‑of‑Concept

Researcher Publishes Windows Defender 0-Day ‘BlueHammer’ LPE Proof‑of‑Concept

A security researcher using the handle Chaotic Eclipse has publicly released a working proof‑of‑concept for a Windows zero‑day local privilege escalation (LPE) exploit called “BlueHammer.” The disclosure, accompanied by full source code on GitHub, was confirmed as functional by vulnerability researcher Will Dormann and demonstrates that a low‑privileged local user can escalate to NT AUTHORITYSYSTEM on affected machines. The release

CrackArmor: Nine AppArmor Flaws Let Local Users Escalate to Root — What Organizations Need to Know

CrackArmor: Nine AppArmor Flaws Let Local Users Escalate to Root — What Organizations Need to Know

AppArmor, a widely deployed Linux Mandatory Access Control (MAC) framework, is at the center of a set of serious vulnerabilities that researchers have dubbed “CrackArmor.” Disclosed on March 12, 2026 by the Qualys Threat Research Unit (TRU), the collection of flaws affects AppArmor’s implementation as a Linux Security Module (LSM) and has been present in the upstream kernel since around