Greg Kroah-Hartman has announced the release of the 5.15.10, 5.10.87, and 5.4.167 stable kernels. These are fairly
small updates, but, unlike yesterday’s single
self-test bug fix updates, do contain important fixes throughout the tree; users
should upgrade.

Source: LWN.net – Stable kernels 5.15.10, 5.10.87, and 5.4.167