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Unrated severityNVD Advisory· Published Jul 29, 2024· Updated Nov 3, 2025

tun: add missing verification for short frame

CVE-2024-41091

Description

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

182

Patches

8
049584807f1d
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
8418f55302fa
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
a9d1c27e2ee3
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
d5ad89b7d01e
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
ad6b3f622ccf
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
589382f50b4a
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
6100e0237204
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
32b0aaba5dbc
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit

Vulnerability mechanics

Generated on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.

References

8

News mentions

0

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