The vulnerability of the phy_prepare_data() function in the net/ethtool/phy.c module, which is part of the Linux kernel’s networking functions, allows a hacker to cause a service failure.

The vulnerability of the phypreparedata function in the net/ethtool/phy.c module of the Linux kernel’s networking functions is related to the use of pointers. Exploiting this vulnerability could allow an attacker to cause a service failure...

CVE-2026-64120

A flaw was found in the Linux kernel's ethtool network utility. Insufficient error handling in the phypreparedata function, specifically for memory allocation failures when handling network device names, can lead to a NULL pointer dereference. This vulnerability can cause a kernel panic in...

CVE-2026-64120

The CVE-2026-64120 issue affects the Linux kernel’s ethtool/phy_prepare_data path. It arises from unverified allocations via kstrdup() for strings like name, drvname, upstream_sfp_name, and downstream_sfp_name, which can yield NULL and cause a NULL pointer dereference in phy_reply_size() and a ke...

CVE-2026-64120: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: net: ethtool: fix NULL pointer dereference in phyreplysize In phypreparedata, several strings such as 'name', 'drvname', 'upstreamsfpname', and 'downstreamsfpname' are allocated using kstrdup. However, these allocations were not...