CVE-2025-37909

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

net: lan743x: Fix memleak issue when GSO enabled

Always map the skb to the LS descriptor. Previously skb was mapped to EXT descriptor when the number of fragments is zero with GSO enabled. Mapping the skb to EXT descriptor prevents it from being freed, leading to a memory leak

Microchip LAN743x driver suffers from a memory leak when GSO is enabled. If a TX frame has zero fragments, the skb was incorrectly mapped to an EXT descriptor instead of the LS descriptor, preventing proper release of memory. Fix ensures that skb is always mapped to the LS descriptor even in the single-fragment case, preventing memory leak during transmission.

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.