CVE Watch19 oct 2026

CVE-2026-46322

In the Linux kernel, the following vulnerability has been resolved: tun: free page on build_skb failure in tun_xdp_one() When build_skb()

CVSS

7.1

Alto

EPSS

0.1%

KEV

—

Exploit Today

0-100

Publicado: 9 jun 2026 · Última mod.: 19 oct 2026 · CWE-401

EPSS · 30d

0.1%EPSS · 30 días0.2%

2026-09-282026-10-25

Descripción técnica

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.

Referencias oficiales

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