{"id":25495,"date":"2026-09-18T04:31:28","date_gmt":"2026-09-17T20:31:28","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-90086"},"modified":"2026-09-18T04:31:28","modified_gmt":"2026-09-17T20:31:28","slug":"cve-2026-90086","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-90086","title":{"rendered":"CVE-2026-90086 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: honor XDP_TX_MET"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>xsk: honor XDP_TX_METADATA in zero-copy path<\/p>\n<p>The zero-copy path reads TX metadata whenever the UMEM has metadata space,<br \/>\neven if the descriptor does not set XDP_TX_METADATA. Pass descriptor<br \/>\noptions through the metadata helpers and ignore metadata unless the option<br \/>\nis set.<\/p>\n<p>This does not fix the existing per-WQE metadata handling for mlx5 MPWQEs.<br \/>\nOnly the descriptor that starts a session passes through<br \/>\nxsk_tx_metadata_request() and configures offload state shared by the batch.<br \/>\nMetadata on descriptors joining an open session is therefore not validated<br \/>\nand does not configure its requested offloads. In addition, a non-NULL<br \/>\nmetadata pointer from such a descriptor is treated as a timestamp<br \/>\ncompletion request even when XDP_TXMD_FLAGS_TIMESTAMP is not set, so its<br \/>\nmetadata union can be overwritten with an unrequested timestamp. Fixing<br \/>\nmixed metadata states within one MPWQE requires a separate change.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>xsk: honor XDP_TX_METADATA in zero-copy path<\/p>\n<p>The zero-copy path reads TX metadata whenever the UMEM has metadata space,<br \/>\neven if th<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25495","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25495","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=25495"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25495"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25495"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}