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security: Active attack: Dirty Frag Linux vulnerability expands post-compromise risk
May 8, 2026
Dirty Frag is a newly disclosed Linux local privilege escalation vulnerability in kernel networking and memory-fragment handling components such as esp4, esp6, and rxrpc. It can escalate an unprivileged user to root and has been seen in limited in-the-wild activity; Microsoft Defender includes detection coverage.
- Source: Microsoft Security Blog