In the Linux kernel, the following vulnerability has been resolved:

net: stmmac: Fix zero-division error when disabling tc cbs

The commit b8c43360f6e4 ("net: stmmac: No need to calculate speed divider
when offload is disabled") allows the "port_transmit_rate_kbps" to be
set to a value of 0, which is then passed to the "div_s64" function when
tc-cbs is disabled. This leads to a zero-division error.

When tc-cbs is disabled, the idleslope, sendslope, and credit values the
credit values are not required to be configured. Therefore, adding a return
statement after setting the txQ mode to DCB when tc-cbs is disabled would
prevent a zero-division error.

kernel.org https://git.kernel.org/stable/c/03582f4752427f60817d896f1a827aff772bd31e [No types assigned]

kernel.org https://git.kernel.org/stable/c/5d43e1ad4567d67af2b42d3ab7c14152ffed25c6 [No types assigned]

kernel.org https://git.kernel.org/stable/c/675faf5a14c14a2be0b870db30a70764df81e2df [No types assigned]

kernel.org https://git.kernel.org/stable/c/837d9df9c0792902710149d1a5e0991520af0f93 [No types assigned]

kernel.org https://git.kernel.org/stable/c/b0da9504a528f05f97d926b4db74ff21917a33e9 [No types assigned]

kernel.org https://git.kernel.org/stable/c/e297a2bf56d12fd7f91a0c209eb6ea84361f3368 [No types assigned]

kernel.org https://git.kernel.org/stable/c/e33fe25b1efe4f2e6a5858786dbc82ae4c44ed4c [No types assigned]