{"id":16126,"date":"2026-09-04T19:05:09","date_gmt":"2026-09-04T11:05:09","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-46321"},"modified":"2026-09-04T19:05:09","modified_gmt":"2026-09-04T11:05:09","slug":"cve-2026-46321","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-46321","title":{"rendered":"CVE-2026-46321 [HIGH] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\ntun: free page on sho"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>tun: free page on short-frame rejection in tun_xdp_one()<\/p>\n<p>tun_xdp_one() returns -EINVAL on a frame shorter than ETH_HLEN without<br \/>\nfreeing the page that vhost_net_build_xdp() allocated for it.<br \/>\ntun_sendmsg() discards that -EINVAL and still returns total_len, so<br \/>\nvhost_tx_batch() takes the success path and never frees the page; each<br \/>\nshort frame in a batch leaks one page-frag chunk.<\/p>\n<p>A local process that can open \/dev\/net\/tun and \/dev\/vhost-net can hit<br \/>\nthis path: it attaches a tun\/tap device as the vhost-net backend and<br \/>\nfeeds TX descriptors whose length minus the virtio-net header is below<br \/>\nETH_HLEN. Each kick leaks the page-frag chunks for that batch, and a<br \/>\ntight submission loop exhausts host memory and triggers an OOM panic.<br \/>\nFree the page before returning -EINVAL, matching the XDP-program error<br \/>\npath in the same function.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>tun: free page on short-frame rejection in tun_xdp_one()<\/p>\n<p>tun_xdp_one() returns -EINVAL on a frame shorter than ETH_HLEN without<br \/>\nfr<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-16126","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/16126","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16126"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16126"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16126"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}