{"id":"CVE-2026-46320","revision":null,"records":[{"revision":"caa9f25401b94371b601d99ff225fa58","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-46320","aliases":[],"title":"tap: free page on error paths in tap_get_user_xdp()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntap: free page on error paths in tap_get_user_xdp()\n\ntap_get_user_xdp() rejects a frame shorter than ETH_HLEN with -EINVAL,\nand returns -ENOMEM when build_skb() fails. Both paths jump to the err\nlabel without freeing the page that vhost_net_build_xdp() allocated for\nthe frame. tap_sendmsg() discards the per-buffer return value and always\nreturns 0, so vhost_tx_batch() takes the success path and never frees\nthe page; each rejected frame in a batch leaks one page-frag chunk.\n\nFree the page on both error paths, before the skb is built. This is the\ntap counterpart of the same leak in tun_xdp_one().","state":0,"publishedAt":"2026-06-09T12:11:12.882+00:00","modifiedAt":"2026-10-19T19:36:58.167+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/tap.c\"\n ],\n \"versions\": [\n {\n \"version\": \"0efac27791ee068075d80f07c55a229b1335ce12\",\n \"lessThan\": \"8d03e65eb6cfbffec471a6b65416f93679bf3286\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0efac27791ee068075d80f07c55a229b1335ce12\",\n \"lessThan\": \"f979971835dddbca86cf99e3b2e2b94a408a1ab2\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0efac27791ee068075d80f07c55a229b1335ce12\",\n \"lessThan\": \"3f52a86a482a69294c50a5a2a097bd6f4104990a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0efac27791ee068075d80f07c55a229b1335ce12\",\n \"lessThan\": \"d30aac0fa00ca0afc3e08174cf7f974a66bdcf05\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0efac27791ee068075d80f07c55a229b1335ce12\",\n \"lessThan\": \"d68eab61944a9b0826fa2e954e42db1aa3201b7a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0efac27791ee068075d80f07c55a229b1335ce12\",\n \"lessThan\": \"e27c17346628cb56843a83f93ac63c314c00f388\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0efac27791ee068075d80f07c55a229b1335ce12\",\n \"lessThan\": \"18a84c35842e19cd3c5534d8cee73d31863f696d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0efac27791ee068075d80f07c55a229b1335ce12\",\n \"lessThan\": \"3bcf7aec6a9d16438f2cec29f5d7c8d5b8edf9b2\",\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/tap.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\": \"6.12.94\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.36\",\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:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","score":7.4,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/8d03e65eb6cfbffec471a6b65416f93679bf3286","https://git.kernel.org/stable/c/f979971835dddbca86cf99e3b2e2b94a408a1ab2","https://git.kernel.org/stable/c/3f52a86a482a69294c50a5a2a097bd6f4104990a","https://git.kernel.org/stable/c/d30aac0fa00ca0afc3e08174cf7f974a66bdcf05","https://git.kernel.org/stable/c/d68eab61944a9b0826fa2e954e42db1aa3201b7a","https://git.kernel.org/stable/c/e27c17346628cb56843a83f93ac63c314c00f388","https://git.kernel.org/stable/c/18a84c35842e19cd3c5534d8cee73d31863f696d","https://git.kernel.org/stable/c/3bcf7aec6a9d16438f2cec29f5d7c8d5b8edf9b2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-46320","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-46320","identifiers":["CVE-2026-46320"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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