CVE-2024-41091: Linux Kernel

High severity, CVSS 7.1. EPSS: 0.3% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: tun: add missing verification for short frame The cited commit missed to check against the validity of the frame length in the tun_xdp_one() path, which could cause a corrupted skb to be sent downstack. Even before the skb is transmitted, the tun_xdp_one-->eth_type_trans() may access the Ethernet header although it can be less than ETH_HLEN. Once transmitted, this could either cause out-of-bound access beyond the actual length, or confuse the underlayer with incorrect or inconsistent header length in the skb metadata. In the alternative path, tun_get_user() already prohibits short frame which has the length less than Ethernet header size from being transmitted for IFF_TAP. This is to drop any frame shorter than the Ethernet header size just like how tun_get_user() does. CVE: CVE-2024-41091

Affected products

• Linux Linux Kernel: from 4.20, before 5.4.281 (fixed in 5.4.281); from 5.5, before 5.10.223 (fixed in 5.10.223); from 5.11, before 5.15.164 (fixed in 5.15.164); from 5.16, before 6.1.102 (fixed in 6.1.102); from 6.2, before 6.6.43 (fixed in 6.6.43); from 6.7, before 6.9.12 (fixed in 6.9.12); …

Published 2024-07-29. Last modified 2026-08-04.