Vulnerabilities > CVE-2024-49977 - Divide By Zero vulnerability in Linux Kernel
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
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.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
References
- https://git.kernel.org/stable/c/e33fe25b1efe4f2e6a5858786dbc82ae4c44ed4c
- https://git.kernel.org/stable/c/b0da9504a528f05f97d926b4db74ff21917a33e9
- https://git.kernel.org/stable/c/5d43e1ad4567d67af2b42d3ab7c14152ffed25c6
- https://git.kernel.org/stable/c/03582f4752427f60817d896f1a827aff772bd31e
- https://git.kernel.org/stable/c/e297a2bf56d12fd7f91a0c209eb6ea84361f3368
- https://git.kernel.org/stable/c/837d9df9c0792902710149d1a5e0991520af0f93
- https://git.kernel.org/stable/c/675faf5a14c14a2be0b870db30a70764df81e2df