ghsa-r3wm-5qjq-c8qp
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5e: Harden uplink netdev access against device unbind
The function mlx5_uplink_netdev_get() gets the uplink netdevice pointer from mdev->mlx5e_res.uplink_netdev. However, the netdevice can be removed and its pointer cleared when unbound from the mlx5_core.eth driver. This results in a NULL pointer, causing a kernel panic.
BUG: unable to handle page fault for address: 0000000000001300 at RIP: 0010:mlx5e_vport_rep_load+0x22a/0x270 [mlx5_core] Call Trace: mlx5_esw_offloads_rep_load+0x68/0xe0 [mlx5_core] esw_offloads_enable+0x593/0x910 [mlx5_core] mlx5_eswitch_enable_locked+0x341/0x420 [mlx5_core] mlx5_devlink_eswitch_mode_set+0x17e/0x3a0 [mlx5_core] devlink_nl_eswitch_set_doit+0x60/0xd0 genl_family_rcv_msg_doit+0xe0/0x130 genl_rcv_msg+0x183/0x290 netlink_rcv_skb+0x4b/0xf0 genl_rcv+0x24/0x40 netlink_unicast+0x255/0x380 netlink_sendmsg+0x1f3/0x420 __sock_sendmsg+0x38/0x60 __sys_sendto+0x119/0x180 do_syscall_64+0x53/0x1d0 entry_SYSCALL_64_after_hwframe+0x4b/0x53
Ensure the pointer is valid before use by checking it for NULL. If it is valid, immediately call netdev_hold() to take a reference, and preventing the netdevice from being freed while it is in use.
{
"affected": [],
"aliases": [
"CVE-2025-39947"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-04T08:15:47Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Harden uplink netdev access against device unbind\n\nThe function mlx5_uplink_netdev_get() gets the uplink netdevice\npointer from mdev-\u003emlx5e_res.uplink_netdev. However, the netdevice can\nbe removed and its pointer cleared when unbound from the mlx5_core.eth\ndriver. This results in a NULL pointer, causing a kernel panic.\n\n BUG: unable to handle page fault for address: 0000000000001300\n at RIP: 0010:mlx5e_vport_rep_load+0x22a/0x270 [mlx5_core]\n Call Trace:\n \u003cTASK\u003e\n mlx5_esw_offloads_rep_load+0x68/0xe0 [mlx5_core]\n esw_offloads_enable+0x593/0x910 [mlx5_core]\n mlx5_eswitch_enable_locked+0x341/0x420 [mlx5_core]\n mlx5_devlink_eswitch_mode_set+0x17e/0x3a0 [mlx5_core]\n devlink_nl_eswitch_set_doit+0x60/0xd0\n genl_family_rcv_msg_doit+0xe0/0x130\n genl_rcv_msg+0x183/0x290\n netlink_rcv_skb+0x4b/0xf0\n genl_rcv+0x24/0x40\n netlink_unicast+0x255/0x380\n netlink_sendmsg+0x1f3/0x420\n __sock_sendmsg+0x38/0x60\n __sys_sendto+0x119/0x180\n do_syscall_64+0x53/0x1d0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\nEnsure the pointer is valid before use by checking it for NULL. If it\nis valid, immediately call netdev_hold() to take a reference, and\npreventing the netdevice from being freed while it is in use.",
"id": "GHSA-r3wm-5qjq-c8qp",
"modified": "2025-10-04T09:30:21Z",
"published": "2025-10-04T09:30:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39947"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2cb17c88edd3a1c7aa6bc880dcdb35a6866fcb2e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6b4be64fd9fec16418f365c2d8e47a7566e9eba5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8df354eb2dd63d111ed5ae2e956e0dbb22bcf93b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d1f3db4e7a3be29fc17f01850f162363f919370d"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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