CVE-2025-39986: Linux 4.4

Affected technology

Linux · 0738eff14d817a02ab082c392c96a1613006f158 to before 063539db42203b29d5aa2adf0cae3d68c646a6b6, 0738eff14d817a02ab082c392c96a1613006f158 to before 4f382cc887adca8478b9d3e6b81aa6698a95fff4, 0738eff14d817a02ab082c392c96a1613006f158 to before 60463a1c138900494cb3adae41142a11cd8feb3c, 0738eff14d817a02ab082c392c96a1613006f158 to before a61ff7ac93270d20ca426c027d6d01c8ac8e904c, 0738eff14d817a02ab082c392c96a1613006f158 to before 2e423e1990f3972cbea779883fef52c2f2acb858, 0738eff14d817a02ab082c392c96a1613006f158 to before de77841652e57afbc46e9e1dbf51ee364fc008e1, 0738eff14d817a02ab082c392c96a1613006f158 to before 7f7b21026a6febdb749f6f6f950427245aa86cce, 0738eff14d817a02ab082c392c96a1613006f158 to before 61da0bd4102c459823fbe6b8b43b01fb6ace4a22
Linux

Linux · 4.4
Linux

Component: Not specified by the source
Function: of
File: drivers/net/can/sun4i_can.c

Attack conditions (Source advisory, CVSS 3.1): Local · Low privileges required · No user interaction required

What an attacker can do

The source says unfortunately, because the sun4i_can driver does not populate its net_device_ops->ndo_change_mtu(), it is possible for an attacker to configure an invalid MTU by doing, for example: $ ip link set can0 mtu 9999 After doing so, the attacker could open a PF_PACKET socket using the ETH_P_CANXL protocol: socket(PF_PACKET, SOCK_RAW, htons(ETH_P_CANXL)) to inject a malicious CAN XL frames. Source advisory’s CVSS 3.1 assessment (base score 7.8/10) rates confidentiality, integrity and availability impact as high.