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How Does mHC Use Its Residual Streams? Selective Routing and Near-Identity Mixing
Analysis of DeepSeek-V4-Flash shows four-stream mHC residual blocks use only about two streams effectively, with late-layer mixing providing little benefit.
The study examines the four-stream residual pathway of DeepSeek-V4-Flash, finding typical attention or FFN sites effectively use about two streams and that residual mixing is modest, occurring primarily in early layers. Replacing late mixers with identity increases C4 perplexity by only 1.9% while replacing early mixers raises it by 41%. Retaining the three largest routing weights per token increases perplexity by at most 2.7%, showing the model uses only part of the flexibility afforded by the four-stream design.
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NVIDIA Brings Real-Time AI to Broadcast, Sports and Global Streaming at IBC
NVIDIA expanded its AI for Media suite at IBC 2026, adding NIM microservices for synthetic video detection, body pose, frame generation, upscaling and HDR.
At IBC 2026 in Amsterdam, NVIDIA announced a major expansion of NVIDIA AI for Media, a collection of GPU-accelerated SDKs, NIM microservices and blueprints for broadcast and streaming workflows. The Synthetic Video Detector (SVD) NIM microservice reaches 99.3% accuracy on text-to-video and 97.7% on image-to-video content, while Video Frame Generation boosts frame rates 2x-4x and Video Super Resolution adds 10-bit support; TrueHDR converts SDR to HDR at up to roughly 2,000 nits. Partners including Dalet, TwelveLabs, Wowza, Vizrt and Ross Video are integrating the new services into verification, compliance and live-production workflows.
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CVE-2026-16028: Protocol::HTTP2 versions before 1.14 for Perl allow memory exhaustion via closed streams that stream_state never removes from the connection stream table
CVE-2026-16028: Protocol::HTTP2 Perl library before 1.14 lets closed streams linger in the connection table, enabling remote memory exhaustion.
Protocol::HTTP2 versions before 1.14 for Perl allow memory exhaustion because closed streams are never removed from the connection stream table by stream_state. The flaw was disclosed on oss-security by Robert Rothenberg on September 7, 2026. Users should upgrade to Protocol-HTTP2 1.14 or later on CPAN.
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Hackers Spend Nearly $7 Million on Expired Domains to Redirect Traffic to Scams and Malware
Infoblox reports Sable Squirrel spent nearly $7 million on expired domains to redirect traffic to illegal sports streaming, gambling, and malware infrastructure.
Infoblox tracked 50,400 dropcatch domains re-registered daily in gTLDs during H1 2026, nearly 20% of all registrations, with .net and .xyz leading. The threat actor Sable Squirrel has acquired more than 10,000 expired domains supporting Asian sports piracy brands such as Xoilac, Cakhia, 90phut, Socolive, and MiTom while promoting betting services like VSBet, ColaScore, and 8xbet. The operation, assessed as Vietnam-based and overlapping the dismantled Xoi Lac TV streaming network, targets users in Vietnam, South Korea, Japan, Taiwan, Singapore, and Australia via a traffic distribution system, publishes Android apps through suspected compromised Google Play developer accounts, and deployed over 31,000 malware samples including Quasar RAT, AsyncRAT, DCRat, NanoCore, Remcos RAT, and njRAT.
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NS1 adds new capabilities and video streaming support to its Pulsar Active Traffic Steering solution
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