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ubuntucveUbuntu.comUB:CVE-2024-41091
HistoryJul 29, 2024 - 12:00 a.m.

CVE-2024-41091

2024-07-2900:00:00
ubuntu.com
ubuntu.com
2
linux kernel
vulnerability
cve-2024-41091
frame length verification
tun
ethernet header

AI Score

6.8

Confidence

High

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