CVE-2026-46322
7.1 HIGHIn the Linux kernel, the following vulnerability has been resolved: tun: free page on build_skb failure in tun_xdp_one() When build_skb...
Published: 2026-06-09 · Last updated: 2026-06-14
Severity and scoring
- CVSS
- 7.1 HIGH
- Vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Description
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 path, matching the put_page() the other error exits of tun_xdp_one() already perform.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-46322
- [Other]https://git.kernel.org/stable/c/4fefc6156a162a9f50035c12091a5e5130c82c6e
- [Other]https://git.kernel.org/stable/c/aa308e9dbb9acb17cacdbbce9e4504f69bac8385
- [Other]https://git.kernel.org/stable/c/aa8963fdce667a42fb7f0bdd2909fadcab02f9a8
- [Other]https://git.kernel.org/stable/c/d16e38fac09a47bfcf98c1ad65a1bb53f94540f5