{"id":"CVE-2026-46320","summary":"tap: free page on error paths in tap_get_user_xdp()","details":"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().","modified":"2026-07-11T09:29:27.989239335Z","published":"2026-06-09T12:11:12.882Z","related":["CGA-rm52-v6v7-fxf9","SUSE-SU-2026:22521-1","SUSE-SU-2026:22522-1","SUSE-SU-2026:2799-1","SUSE-SU-2026:2800-1","SUSE-SU-2026:2840-1","SUSE-SU-2026:2841-1","openSUSE-SU-2026:11014-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46320.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/18a84c35842e19cd3c5534d8cee73d31863f696d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3bcf7aec6a9d16438f2cec29f5d7c8d5b8edf9b2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3f52a86a482a69294c50a5a2a097bd6f4104990a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8d03e65eb6cfbffec471a6b65416f93679bf3286"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d30aac0fa00ca0afc3e08174cf7f974a66bdcf05"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d68eab61944a9b0826fa2e954e42db1aa3201b7a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e27c17346628cb56843a83f93ac63c314c00f388"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f979971835dddbca86cf99e3b2e2b94a408a1ab2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46320.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46320"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0efac27791ee068075d80f07c55a229b1335ce12"},{"fixed":"8d03e65eb6cfbffec471a6b65416f93679bf3286"},{"fixed":"f979971835dddbca86cf99e3b2e2b94a408a1ab2"},{"fixed":"3f52a86a482a69294c50a5a2a097bd6f4104990a"},{"fixed":"d30aac0fa00ca0afc3e08174cf7f974a66bdcf05"},{"fixed":"d68eab61944a9b0826fa2e954e42db1aa3201b7a"},{"fixed":"e27c17346628cb56843a83f93ac63c314c00f388"},{"fixed":"18a84c35842e19cd3c5534d8cee73d31863f696d"},{"fixed":"3bcf7aec6a9d16438f2cec29f5d7c8d5b8edf9b2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46320.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.10.259"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.210"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.176"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.143"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.94"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.36"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.12"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46320.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H"}]}