CVE-2025-38125

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

net: stmmac: make sure that ptp_rate is not 0 before configuring EST

If the ptp_rate recorded earlier in the driver happens to be 0, this bogus value will propagate up to EST configuration, where it will trigger a division by 0.

Prevent this division by 0 by adding the corresponding check and error code.

This patch fixes a division-by-zero issue in the stmmac_est driver where an invalid ptp_rate value of 0 could lead to a kernel crash during Enhanced Scheduled Traffic configuration. A local attacker with high privileges could trigger this by misconfiguring the PTP subsystem.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.