fkie_cve-2025-38150
Vulnerability from fkie_nvd
Published
2025-07-03 09:15
Modified
2025-07-03 15:13
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: af_packet: move notifier's packet_dev_mc out of rcu critical section Syzkaller reports the following issue: BUG: sleeping function called from invalid context at kernel/locking/mutex.c:578 __mutex_lock+0x106/0xe80 kernel/locking/mutex.c:746 team_change_rx_flags+0x38/0x220 drivers/net/team/team_core.c:1781 dev_change_rx_flags net/core/dev.c:9145 [inline] __dev_set_promiscuity+0x3f8/0x590 net/core/dev.c:9189 netif_set_promiscuity+0x50/0xe0 net/core/dev.c:9201 dev_set_promiscuity+0x126/0x260 net/core/dev_api.c:286 packet_dev_mc net/packet/af_packet.c:3698 [inline] packet_dev_mclist_delete net/packet/af_packet.c:3722 [inline] packet_notifier+0x292/0xa60 net/packet/af_packet.c:4247 notifier_call_chain+0x1b3/0x3e0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2214 [inline] call_netdevice_notifiers net/core/dev.c:2228 [inline] unregister_netdevice_many_notify+0x15d8/0x2330 net/core/dev.c:11972 rtnl_delete_link net/core/rtnetlink.c:3522 [inline] rtnl_dellink+0x488/0x710 net/core/rtnetlink.c:3564 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6955 netlink_rcv_skb+0x219/0x490 net/netlink/af_netlink.c:2534 Calling `PACKET_ADD_MEMBERSHIP` on an ops-locked device can trigger the `NETDEV_UNREGISTER` notifier, which may require disabling promiscuous and/or allmulti mode. Both of these operations require acquiring the netdev instance lock. Move the call to `packet_dev_mc` outside of the RCU critical section. The `mclist` modifications (add, del, flush, unregister) are protected by the RTNL, not the RCU. The RCU only protects the `sklist` and its associated `sks`. The delayed operation on the `mclist` entry remains within the RTNL.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2dd4781c5af99415ebbd2f7cc763feb109863c05
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d8d85ef0a631df9127f202e6371bb33a0b589952
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_packet: move notifier\u0027s 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."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: af_packet: mover packet_dev_mc del notificador fuera de la secci\u00f3n cr\u00edtica de rcu Syzkaller informa el siguiente problema: ERROR: funci\u00f3n inactiva llamada desde un contexto no v\u00e1lido en kernel/locking/mutex.c:578 __mutex_lock+0x106/0xe80 kernel/locking/mutex.c:746 team_change_rx_flags+0x38/0x220 drivers/net/team/team_core.c:1781 dev_change_rx_flags net/core/dev.c:9145 [inline] __dev_set_promiscuity+0x3f8/0x590 net/core/dev.c:9189 netif_set_promiscuity+0x50/0xe0 net/core/dev.c:9201 dev_set_promiscuity+0x126/0x260 net/core/dev_api.c:286 packet_dev_mc net/packet/af_packet.c:3698 [inline] packet_dev_mclist_delete net/packet/af_packet.c:3722 [inline] packet_notifier+0x292/0xa60 net/packet/af_packet.c:4247 notifier_call_chain+0x1b3/0x3e0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2214 [inline] call_netdevice_notifiers net/core/dev.c:2228 [inline] unregister_netdevice_many_notify+0x15d8/0x2330 net/core/dev.c:11972 rtnl_delete_link net/core/rtnetlink.c:3522 [inline] rtnl_dellink+0x488/0x710 net/core/rtnetlink.c:3564 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6955 netlink_rcv_skb+0x219/0x490 net/netlink/af_netlink.c:2534 Llamar a `PACKET_ADD_MEMBERSHIP` en un dispositivo con bloqueo de operaciones puede activar el notificador `NETDEV_UNREGISTER`, lo que puede requerir la desactivaci\u00f3n del modo promiscuo o multimodo. Ambas operaciones requieren adquirir el bloqueo de la instancia netdev. Mueva la llamada a `packet_dev_mc` fuera de la secci\u00f3n cr\u00edtica de RCU. Las modificaciones de `mclist` (a\u00f1adir, eliminar, vaciar, anular registro) est\u00e1n protegidas por el RTNL, no por la RCU. La RCU solo protege `sklist` y sus `sks` asociados. La operaci\u00f3n retardada en la entrada `mclist` permanece dentro del RTNL."
    }
  ],
  "id": "CVE-2025-38150",
  "lastModified": "2025-07-03T15:13:53.147",
  "metrics": {},
  "published": "2025-07-03T09:15:29.960",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2dd4781c5af99415ebbd2f7cc763feb109863c05"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d8d85ef0a631df9127f202e6371bb33a0b589952"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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