{"cve":"CVE-2025-39796","nvd":{"published":"2025-09-12T16:15:33.987","modified":"2026-10-19T21:10:00.160","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: lapbether: ignore ops-locked netdevs\n\nSyzkaller managed to trigger lock dependency in xsk_notify via\nregister_netdevice. As discussed in [0], using register_netdevice\nin the notifiers is problematic so skip adding lapbeth for ops-locked\ndevices.\n\n       xsk_notifier+0xa4/0x280 net/xdp/xsk.c:1645\n       notifier_call_chain+0xbc/0x410 kernel/notifier.c:85\n       call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230\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\n       unregister_netdevice_many net/core/dev.c:12140 [inline]\n       unregister_netdevice_queue+0x305/0x3f0 net/core/dev.c:11984\n       register_netdevice+0x18f1/0x2270 net/core/dev.c:11149\n       lapbeth_new_device drivers/net/wan/lapbether.c:420 [inline]\n       lapbeth_device_event+0x5b1/0xbe0 drivers/net/wan/lapbether.c:462\n       notifier_call_chain+0xbc/0x410 kernel/notifier.c:85\n       call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230\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\n       netif_change_flags+0x108/0x160 net/core/dev.c:9526\n       dev_change_flags+0xba/0x250 net/core/dev_api.c:68\n       devinet_ioctl+0x11d5/0x1f50 net/ipv4/devinet.c:1200\n       inet_ioctl+0x3a7/0x3f0 net/ipv4/af_inet.c:1001\n\n0: https://lore.kernel.org/netdev/20250625140357.6203d0af@kernel.org/","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":[],"references":["https://git.kernel.org/stable/c/53898ebabe843bfa7baea9dae152797d5d0563c9","https://git.kernel.org/stable/c/57a7ef338a2cd62a22a15a199ab9afd3d953df55","https://git.kernel.org/stable/c/628e233c1fefcc227fae9bdcff6be8ac92e1b4d2"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2025-39796","score":0.00154,"percentile":0.04509,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}