CVE-2024-41091

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