{"id":24637,"date":"2026-09-16T20:32:34","date_gmt":"2026-09-16T12:32:34","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89950"},"modified":"2026-09-16T20:32:34","modified_gmt":"2026-09-16T12:32:34","slug":"cve-2026-89950","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89950","title":{"rendered":"CVE-2026-89950 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: mcast: li"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>batman-adv: mcast: linearize skbuff for packet generation<\/p>\n<p>batadv_mcast_forw_packet() and batadv_mcast_forw_scrape() is not only<br \/>\ncalled (indirectly) by the unsharing+linearizing batadv_recv_mcast_packet()<br \/>\nhandler. When it is called (indirectly) by batadv_mcast_forw_mcsend() then<br \/>\nit will be unshared but not linearized. The SKB_LINEAR_ASSERT() can<br \/>\ntherefore cause a fatal BUG().<\/p>\n<p>The linearization should happen during the expansion of the head because<br \/>\nthe scrape function can be hit already during the initial<br \/>\nbatadv_mcast_forw_mode() selection code:<\/p>\n<p>* batadv_interface_tx<br \/>\n* batadv_mcast_forw_mode<br \/>\n* batadv_mcast_forw_mode_by_count()<br \/>\n* batadv_mcast_forw_push()<br \/>\n  -&gt; calls batadv_mcast_forw_expand_head() before everything else<br \/>\n* batadv_mcast_forw_push_tvlvs()<br \/>\n* batadv_mcast_forw_push_dests()<br \/>\n* batadv_mcast_forw_push_adjust_padding()<br \/>\n* batadv_mcast_forw_scrape()<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>batman-adv: mcast: linearize skbuff for packet generation<\/p>\n<p>batadv_mcast_forw_packet() and batadv_mcast_forw_scrape() is not only<br \/>\nca<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24637","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24637","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=24637"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24637"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24637"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}