Foster Snowhill

**Name of the Vulnerable Software and Affected Versions** Linux kernel (affected versions not specified) **Description** The issue concerns an out-of-bounds DPE read in the Linux kernel, specifically in the ipheth component of the usbnet module. The problem has been fixed by limiting the number of processed DPEs to the amount that fits into the fixed-size NDP16 header. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** Linux kernel (affected versions not specified) **Description** A vulnerability in the Linux kernel has been identified, specifically in the usbnet: ipheth component. The issue arises from the original code allowing the start of NDP16 to be anywhere within the URB based on the `wNdpIndex` value in NTH16. This led to a potential out-of-bounds read, as only the start position of NDP16 was checked, allowing the fixed-length part of NDP16 to extend past the end of URB. To address this, the code now relies on and checks for the specific format where the NDP16 header directly follows NTH16, as seen on iOS devices. Additionally, an existing NCM-specific minimal URB length check ensures that the fixed-length part of NDP16 plus a set amount of DPEs fit within the URB. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** Linux kernel (affected versions not specified) **Description** A potential overflow issue in the DPE length check was identified, which could lead to an out-of-bounds (OoB) read. The issue occurred when `wDatagramIndex + wDatagramLength` exceeded `U16 MAX`. To resolve this, the `wDatagramIndex` term was moved to the other side of the inequality. An existing condition ensures that `wDatagramIndex` is less than `urb->actual length`. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.