Image-mode RHEL and bootc move /usr to a read-only ostree commit and turn host updates into container pulls. That fixes one class of problem and creates a different one for defenders. Here is what actually changes on disk, what to detect, and where the model breaks.
A defender-oriented look at where HTTP/2-to-HTTP/1.1 request smuggling sits in 2026 — the parser-differential class that keeps finding new homes, what the detection actually looks like in Splunk, and what most teams miss on the first tuning pass.
Chaotic Eclipse dropped two unpatched Windows zero-days on May 13, 2026. YellowKey turns an NTFS transaction log on a USB stick into a BitLocker bypass through WinRE — physical access, no recovery key, no PIN required on TPM-only boxes. GreenPlasma is the companion privilege escalation through CTFMON. No CVEs, no patches, and a researcher who has promised more for June’s Patch Tuesday.
Device Bound Session Credentials are landing in Chrome and Edge, but the gap between the protocol promise and what your SIEM sees is wider than the vendor decks suggest. A defender-oriented look at what detection actually requires right now.
A defender-oriented walkthrough of investigating adversary-in-the-middle token theft against Entra ID now that token protection, CAE, and device-bound sessions are widely on — what the logs actually contain, what the first detection misses, and where the artifacts live outside Entra.
ClickFix initial access has been pasting PowerShell into RunMRU for two years and most detection content still treats it like a primer. Here is what the telemetry actually looks like, what tunes out, and where teams keep getting it wrong.
CVE-2026-7482 turns Ollama’s /api/create into a heap-read primitive that exfiltrates prompts, system messages, and process environment variables through a crafted GGUF tensor shape. Patch to 0.17.1; everything else is a stopgap.
A defender-focused analysis of how APT29-aligned and Storm-2372-style intrusion sets are abusing device authorization grants and long-lived OAuth consent in Entra ID through 2026 — what to detect, what to revoke, and where it maps to 800-53.
A defender-oriented analysis of firmware- and bootloader-resident implants on perimeter network appliances, what they look like in practice, how to detect them, and how to map the response to NIST 800-53.
Hyunwoo Kim’s Dirty Frag chain extends the Dirty Pipe / Copy Fail class to skb paged fragments. The xfrm ESP receive path provides a deterministic 4-byte page-cache store (CVE-2026-43284); the rxrpc receive path provides a namespace-free trigger (CVE-2026-43500). One PoC, no race, root on Ubuntu, RHEL, CentOS Stream, AlmaLinux, Fedora, and openSUSE — including hosts that already blocklisted algif_aead for Copy Fail.
