CVE-2024-41090

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> tap: add missing verification for short frame<br /> <br /> The cited commit missed to check against the validity of the frame length<br /> in the tap_get_user_xdp() path, which could cause a corrupted skb to be<br /> sent downstack. Even before the skb is transmitted, the<br /> tap_get_user_xdp()--&gt;skb_set_network_header() may assume the size is more<br /> than ETH_HLEN. Once transmitted, this could either cause out-of-bound<br /> access beyond the actual length, or confuse the underlayer with incorrect<br /> or inconsistent header length in the skb metadata.<br /> <br /> In the alternative path, tap_get_user() already prohibits short frame which<br /> has the length less than Ethernet header size from being transmitted.<br /> <br /> This is to drop any frame shorter than the Ethernet header size just like<br /> how tap_get_user() does.<br /> <br /> CVE: CVE-2024-41090