{"id":"CVE-2025-38150","summary":"af_packet: move notifier's packet_dev_mc out of rcu critical section","details":"In the Linux kernel, the following vulnerability has been resolved:\n\naf_packet: move notifier's packet_dev_mc out of rcu critical section\n\nSyzkaller reports the following issue:\n\n BUG: sleeping function called from invalid context at kernel/locking/mutex.c:578\n __mutex_lock+0x106/0xe80 kernel/locking/mutex.c:746\n team_change_rx_flags+0x38/0x220 drivers/net/team/team_core.c:1781\n dev_change_rx_flags net/core/dev.c:9145 [inline]\n __dev_set_promiscuity+0x3f8/0x590 net/core/dev.c:9189\n netif_set_promiscuity+0x50/0xe0 net/core/dev.c:9201\n dev_set_promiscuity+0x126/0x260 net/core/dev_api.c:286 packet_dev_mc net/packet/af_packet.c:3698 [inline]\n packet_dev_mclist_delete net/packet/af_packet.c:3722 [inline]\n packet_notifier+0x292/0xa60 net/packet/af_packet.c:4247\n notifier_call_chain+0x1b3/0x3e0 kernel/notifier.c:85\n call_netdevice_notifiers_extack net/core/dev.c:2214 [inline]\n call_netdevice_notifiers net/core/dev.c:2228 [inline]\n unregister_netdevice_many_notify+0x15d8/0x2330 net/core/dev.c:11972\n rtnl_delete_link net/core/rtnetlink.c:3522 [inline]\n rtnl_dellink+0x488/0x710 net/core/rtnetlink.c:3564\n rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6955\n netlink_rcv_skb+0x219/0x490 net/netlink/af_netlink.c:2534\n\nCalling `PACKET_ADD_MEMBERSHIP` on an ops-locked device can trigger\nthe `NETDEV_UNREGISTER` notifier, which may require disabling promiscuous\nand/or allmulti mode. Both of these operations require acquiring\nthe netdev instance lock.\n\nMove the call to `packet_dev_mc` outside of the RCU critical section.\nThe `mclist` modifications (add, del, flush, unregister) are protected by\nthe RTNL, not the RCU. The RCU only protects the `sklist` and its\nassociated `sks`. The delayed operation on the `mclist` entry remains\nwithin the RTNL.","modified":"2026-04-02T12:47:49.894472Z","published":"2025-07-03T08:35:55.257Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38150.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2dd4781c5af99415ebbd2f7cc763feb109863c05"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d8d85ef0a631df9127f202e6371bb33a0b589952"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38150.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38150"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ad7c7b2172c388818a111455643491d75f535e90"},{"fixed":"2dd4781c5af99415ebbd2f7cc763feb109863c05"},{"fixed":"d8d85ef0a631df9127f202e6371bb33a0b589952"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38150.json"}}],"schema_version":"1.7.5"}