CVE-2026-46322

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: tun: free page on build_skb failure in tun_xdp_one() When build_skb() fails in tun_xdp_one(), the function sets ret to -ENOMEM and jumps to the out label, which returns without freeing the page that vhost_net_build_xdp() allocated for the frame. As with the short-frame rejection path, tun_sendmsg() discards the per-buffer error and still returns total_len, so vhost_tx_batch() takes the success path and never frees the page. Each build_skb() failure in a batch leaks one page-frag chunk. Free the page before taking the error...

Affected product and versions

Product

Linux Linux, linux kernel

Affected versions

>= 043d222f93ab8c76b56a3b315cd8692e35affb6c < 26fe549b5192536b6c1c68a2dfdc8c0dcf9fa4a9, >= 043d222f93ab8c76b56a3b315cd8692e35affb6c < 793385c154771603b8671dd8338927221e9d8d78, >= 043d222f93ab8c76b56a3b315cd8692e35affb6c < 2638a9c1521905bb5c5d1e95c8fbc09f79148ed7, >= 043d222f93ab8c76b56a3b315cd8692e35affb6c < 60d9c0d6cdde5420d6483c921b16fe5465eb5238, >= 043d222f93ab8c76b56a3b315cd8692e35affb6c < d16e38fac09a47bfcf98c1ad65a1bb53f94540f5, >= 043d222f93ab8c76b56a3b315cd8692e35affb6c < aa308e9dbb9acb17cacdbbce9e4504f69bac8385, >= 043d222f93ab8c76b56a3b315cd8692e35affb6c < 4fefc6156a162a9f50035c12091a5e5130c82c6e, >= 043d222f93ab8c76b56a3b315cd8692e35affb6c < aa8963fdce667a42fb7f0bdd2909fadcab02f9a8, >= 4.20, >= 4.20 < 5.10.259, >= 5.11 < 5.15.210, >= 5.16 < 6.1.176, >= 6.2 < 6.6.143, >= 6.7 < 6.12.93, >= 6.13 < 6.18.35, >= 6.19 < 7.0.12, 7.1

Fixed versions

5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.93, 6.18.35, 7.0.12

Technical data

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CWE

Not available