{"id":4655,"date":"2026-09-04T18:46:40","date_gmt":"2026-09-04T10:46:40","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-64580"},"modified":"2026-09-04T18:46:40","modified_gmt":"2026-09-04T10:46:40","slug":"cve-2026-64580","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-64580","title":{"rendered":"CVE-2026-64580 [HIGH] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm6: clear dst.dev"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>xfrm6: clear dst.dev on error to avoid double netdev_put in xfrm6_fill_dst()<\/p>\n<p>On the error path where in6_dev_get(dev) returns NULL, xfrm6_fill_dst()<br \/>\nreleases the device reference with netdev_put() but leaves<br \/>\nxdst-&gt;u.dst.dev set. dst_destroy() later calls netdev_put(dst-&gt;dev)<br \/>\nagain, so the same net_device reference is released twice, underflowing<br \/>\nits refcount (ref_tracker WARNING + &#8220;unregister_netdevice: waiting for<br \/>\n to become free&#8221;).<\/p>\n<p>Clear xdst-&gt;u.dst.dev after the netdev_put(), the same way the XFRM<br \/>\ndevice-offload paths xfrm_dev_state_add() and xfrm_dev_policy_add() in<br \/>\nnet\/xfrm\/xfrm_device.c NULL -&gt;dev when releasing the reference on error.<\/p>\n<p>  ref_tracker: reference already released.<br \/>\n  ref_tracker: allocated in:<br \/>\n   xfrm6_fill_dst (net\/ipv6\/xfrm6_policy.c:86)<br \/>\n   &#8230;<br \/>\n   udpv6_sendmsg (net\/ipv6\/udp.c:1696)<br \/>\n   &#8230;<br \/>\n  ref_tracker: freed in:<br \/>\n   xfrm6_fill_dst (net\/ipv6\/xfrm6_policy.c:90)<br \/>\n   &#8230;<br \/>\n  WARNING: lib\/ref_tracker.c:322 at ref_tracker_free+0x58b\/0x780<br \/>\n   dst_destroy (net\/core\/dst.c:115)<br \/>\n   rcu_core<br \/>\n   handle_softirqs<br \/>\n   &#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>xfrm6: clear dst.dev on error to avoid double netdev_put in xfrm6_fill_dst()<\/p>\n<p>On the error path where in6_dev_get(dev) returns NULL<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-4655","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/4655","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=4655"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4655"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4655"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}