Threats Tagged 'cve-2025-68799'

A vulnerability in the Linux kernel's caif subsystem was resolved involving an integer underflow in the cffrml_receive() function. The function subtracts 2 from a length field without ensuring the length is at least 2 when FCS is disabled. Malicious packets with length 0 or 1 can trigger this underflow, potentially causing memory exhaustion, kernel instability, and information disclosure from uninitialized kernel memory. The issue is fixed by validating the length before subtraction.

In the Linux kernel, the following vulnerability has been resolved: caif: fix integer underflow in cffrml_receive() The cffrml_receive() function extracts a length field from the packet header and, when FCS is disabled, subtracts 2 from this length without validating that len >= 2. If an attacker sends a malicious packet with a length field of 0 or 1 to an interface with FCS disabled, the subtraction causes an integer underflow. This can lead to memory exhaustion and kernel instability, potential information disclosure if padding contains uninitialized kernel memory. Fix this by validating that len >= 2 before performing the subtraction.