{"id":"CVE-2026-46322","revision":null,"records":[{"revision":"7f48807d359a4368b6c860b443edcb4d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-46322","aliases":[],"title":"tun: free page on build_skb failure in tun_xdp_one()","description":"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 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.","state":0,"publishedAt":"2026-06-09T12:11:14.776+00:00","modifiedAt":"2026-10-19T19:36:58.325+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/tun.c\"\n ],\n \"versions\": [\n {\n \"version\": \"043d222f93ab8c76b56a3b315cd8692e35affb6c\",\n \"lessThan\": \"26fe549b5192536b6c1c68a2dfdc8c0dcf9fa4a9\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"043d222f93ab8c76b56a3b315cd8692e35affb6c\",\n \"lessThan\": \"793385c154771603b8671dd8338927221e9d8d78\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"043d222f93ab8c76b56a3b315cd8692e35affb6c\",\n \"lessThan\": \"2638a9c1521905bb5c5d1e95c8fbc09f79148ed7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"043d222f93ab8c76b56a3b315cd8692e35affb6c\",\n \"lessThan\": \"60d9c0d6cdde5420d6483c921b16fe5465eb5238\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"043d222f93ab8c76b56a3b315cd8692e35affb6c\",\n \"lessThan\": \"d16e38fac09a47bfcf98c1ad65a1bb53f94540f5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"043d222f93ab8c76b56a3b315cd8692e35affb6c\",\n \"lessThan\": \"aa308e9dbb9acb17cacdbbce9e4504f69bac8385\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"043d222f93ab8c76b56a3b315cd8692e35affb6c\",\n \"lessThan\": \"4fefc6156a162a9f50035c12091a5e5130c82c6e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"043d222f93ab8c76b56a3b315cd8692e35affb6c\",\n \"lessThan\": \"aa8963fdce667a42fb7f0bdd2909fadcab02f9a8\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/tun.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4.20\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"4.20\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.259\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.210\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.176\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.143\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.93\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.35\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0.12\",\n \"lessThanOrEqual\": \"7.0.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/26fe549b5192536b6c1c68a2dfdc8c0dcf9fa4a9","https://git.kernel.org/stable/c/793385c154771603b8671dd8338927221e9d8d78","https://git.kernel.org/stable/c/2638a9c1521905bb5c5d1e95c8fbc09f79148ed7","https://git.kernel.org/stable/c/60d9c0d6cdde5420d6483c921b16fe5465eb5238","https://git.kernel.org/stable/c/d16e38fac09a47bfcf98c1ad65a1bb53f94540f5","https://git.kernel.org/stable/c/aa308e9dbb9acb17cacdbbce9e4504f69bac8385","https://git.kernel.org/stable/c/4fefc6156a162a9f50035c12091a5e5130c82c6e","https://git.kernel.org/stable/c/aa8963fdce667a42fb7f0bdd2909fadcab02f9a8"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-46322","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-46322","identifiers":["CVE-2026-46322"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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