{"id":"CVE-2026-46322","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ntun: free page on build_skb failure in tun_xdp_one()\n\nWhen build_skb() fails in tun_xdp_one(), the function sets ret to\n-ENOMEM and jumps to the out label, which return…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ntun: free page on build_skb failure in tun_xdp_one()\n\nWhen build_skb() fails in tun_xdp_one(), the function sets ret to\n-ENOMEM and jumps to the out label, which return…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 4.20, < 5.10.259","linux_kernel >= 5.11, < 5.15.210","linux_kernel >= 5.16, < 6.1.176","linux_kernel >= 6.2, < 6.6.143","linux_kernel >= 6.7, < 6.12.93","linux_kernel >= 6.13, < 6.18.35","linux_kernel >= 6.19, < 7.0.12","linux_kernel = 7.1"],"patched":["linux_kernel 7.0.12"],"published":"2026-06-09","updated":"2026-10-15","sourceUpdated":"2026-10-15T02:19:53.747","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-46322","references":[{"url":"https://git.kernel.org/stable/c/2638a9c1521905bb5c5d1e95c8fbc09f79148ed7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/26fe549b5192536b6c1c68a2dfdc8c0dcf9fa4a9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4fefc6156a162a9f50035c12091a5e5130c82c6e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/60d9c0d6cdde5420d6483c921b16fe5465eb5238","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/793385c154771603b8671dd8338927221e9d8d78","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/aa308e9dbb9acb17cacdbbce9e4504f69bac8385","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/aa8963fdce667a42fb7f0bdd2909fadcab02f9a8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d16e38fac09a47bfcf98c1ad65a1bb53f94540f5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-784472.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00129,"epssPercentile":0.02232,"ingestedAt":"2026-10-15T03:30:12.899Z","slug":"CVE-2026-46322","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ntun: free page on build_skb failure in tun_xdp_one()\n\nWhen build_skb() fails in tun_xdp_one(), the function sets ret to\n-ENOMEM and jumps to the out label, which returns without freeing the\npage that vhost_net_build_xdp() allocated for the frame. As with the\nshort-frame rejection path, tun_sendmsg() discards the per-buffer error\nand still returns total_len, so vhost_tx_batch() takes the success path\nand never frees the page. Each build_skb() failure in a batch leaks one\npage-frag chunk.\n\nFree the page before taking the error path, matching the put_page() the\nother error exits of tun_xdp_one() already perform.\n\n## Affected\n\n- `linux_kernel >= 4.20, < 5.10.259`\n- `linux_kernel >= 5.11, < 5.15.210`\n- `linux_kernel >= 5.16, < 6.1.176`\n- `linux_kernel >= 6.2, < 6.6.143`\n- `linux_kernel >= 6.7, < 6.12.93`\n- `linux_kernel >= 6.13, < 6.18.35`\n- `linux_kernel >= 6.19, < 7.0.12`\n- `linux_kernel = 7.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.12`","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}