{"id":70045,"date":"2025-09-12T21:32:08","date_gmt":"2025-09-12T18:02:08","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2025-39796-net-lapbether-ignore-ops-locked-netdevs\/"},"modified":"2025-09-12T21:32:08","modified_gmt":"2025-09-12T18:02:08","slug":"cve-2025-39796-net-lapbether-ignore-ops-locked-netdevs","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2025-39796-net-lapbether-ignore-ops-locked-netdevs\/","title":{"rendered":"CVE-2025-39796 &#8211; net: lapbether: ignore ops-locked netdevs"},"content":{"rendered":"<p><strong>CVE ID : <\/strong>CVE-2025-39796<br \/>\n<br \/>\n<strong>Published : <\/strong> Sept. 12, 2025, 4:15 p.m. | 29\u00a0minutes ago<br \/>\n<br \/>\n<strong>Description : <\/strong>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net: lapbether: ignore ops-locked netdevs<\/p>\n<p>Syzkaller managed to trigger lock dependency in xsk_notify via<br \/>\nregister_netdevice. As discussed in [0], using register_netdevice<br \/>\nin the notifiers is problematic so skip adding lapbeth for ops-locked<br \/>\ndevices.<\/p>\n<p>       xsk_notifier+0xa4\/0x280 net\/xdp\/xsk.c:1645<br \/>\n       notifier_call_chain+0xbc\/0x410 kernel\/notifier.c:85<br \/>\n       call_netdevice_notifiers_info+0xbe\/0x140 net\/core\/dev.c:2230<br \/>\n       call_netdevice_notifiers_extack net\/core\/dev.c:2268 [inline]\n       call_netdevice_notifiers net\/core\/dev.c:2282 [inline]\n       unregister_netdevice_many_notify+0xf9d\/0x2700 net\/core\/dev.c:12077<br \/>\n       unregister_netdevice_many net\/core\/dev.c:12140 [inline]\n       unregister_netdevice_queue+0x305\/0x3f0 net\/core\/dev.c:11984<br \/>\n       register_netdevice+0x18f1\/0x2270 net\/core\/dev.c:11149<br \/>\n       lapbeth_new_device drivers\/net\/wan\/lapbether.c:420 [inline]\n       lapbeth_device_event+0x5b1\/0xbe0 drivers\/net\/wan\/lapbether.c:462<br \/>\n       notifier_call_chain+0xbc\/0x410 kernel\/notifier.c:85<br \/>\n       call_netdevice_notifiers_info+0xbe\/0x140 net\/core\/dev.c:2230<br \/>\n       call_netdevice_notifiers_extack net\/core\/dev.c:2268 [inline]\n       call_netdevice_notifiers net\/core\/dev.c:2282 [inline]\n       __dev_notify_flags+0x12c\/0x2e0 net\/core\/dev.c:9497<br \/>\n       netif_change_flags+0x108\/0x160 net\/core\/dev.c:9526<br \/>\n       dev_change_flags+0xba\/0x250 net\/core\/dev_api.c:68<br \/>\n       devinet_ioctl+0x11d5\/0x1f50 net\/ipv4\/devinet.c:1200<br \/>\n       inet_ioctl+0x3a7\/0x3f0 net\/ipv4\/af_inet.c:1001<\/p>\n<p>0: https:\/\/lore.kernel.org\/netdev\/20250625140357.6203d0af@kernel.org\/<br \/>\n<br \/>\n<strong>Severity:<\/strong> 0.0 | NA<br \/>\n<br \/>\nVisit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID : CVE-2025-39796 Published : Sept. 12, 2025, 4:15 p.m. | 29\u00a0minutes ago Description : In the Linux kernel, the following vulnerability has been resolved: net: lapbether: ignore ops-locked netdevs Syzkaller managed to trigger lock dependency in xsk_notify via register_netdevice. As discussed in [0], using register_netdevice in the notifiers is problematic so skip adding &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-70045","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/70045","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=70045"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/70045\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=70045"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=70045"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=70045"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}