For the first time in this electoral cycle, the state of Texas is officially a tossup.
The CBS News/YouGov poll is not an outlier over the last month. There have been eight polls released publicly since the beginning of June. The result is that Biden and Trump are basically tied, with Biden up by a mere 0.3 points in Texas. Importantly, and unlike in other states, the polls in Texas have not overestimated Democrats over the last few cycles. If anything Democrats actually slightly outperformed their final polls in the 2016 presidential race and 2018 Senate races.