Add kernelCTF CVE-2025-38477_cos

[n132]

[iwr-redmond]

For reference, here are links to the NF4 BnB versions of the newer Flux models:

• Krea
• Kontext

[psychedelicious]

Also GGUF quant for T5-XXL (which needs a bit more work, as we don't have model loading code for T5 GGUF yet): https://huggingface.co/city96/t5-v1_1-xxl-encoder-gguf/