Tempting to spray glyphosate (Roundup) on green winter weeds/fescue in dormant Bermuda—but only on fully dormant Bermuda, with extreme caution.
Get on hands and knees. Examine base of grass plants. If ANY greenery, DO NOT SPRAY.
Centipedegrass, zoysiagrass, St. Augustinegrass NEVER go fully dormant. Too dangerous to ever apply Roundup to them.
Results not immediate; weed damage visible in weeks.

this bermudagrass is not dormant

Roundup damage
Grass Won't Grow Under a Globe Willow: Convert to a Planting Bed Instead
Fescue in Shade and Seed Purity: Federal Law Allows "Impurities"
Overseeding Bermuda with St. Augustine or Zoysia: Not Effective
Burning Bermuda Grass: Risks Outweigh Benefits; Sugar Is Not a Soil Amendment
Fescue Grass: Cold-Hardy, Fast-Establishing for Northern Lawns
Recycling Bermuda Grass Clippings: Best Practices
Mowing Fescue the Right Way: Height, Frequency, and Blade Care
Converting Grass to River Rock: Removal Methods and Underlayment
Eradicating Bermuda Grass in Desert Rock Landscaping: Tucson Strategies
Marathon II Grass Identification and Weed Control Strategy
Planting a Lawn from Seed: A Homeowner's Guide
Dethatching Bermudagrass: When It's Needed and How to Do It
Controlling Bermudagrass in Fescue and Other Cool-Season Lawns
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