CVE-2025-39947— net/mlx5e: Harden uplink netdev access against device unbind
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I. Basic Information for CVE-2025-39947
Vulnerability Information
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Vulnerability Title
net/mlx5e: Harden uplink netdev access against device unbind
Source: NVD (National Vulnerability Database)
Vulnerability Description
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: <TASK> 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于设备解绑时未正确保护上行链路网络设备访问，可能导致空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-39947
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Same Patch Batch · Linux · 2025-10-04 · 144 CVEs total
| CVE-2025-39946 | 9.8 CRITICAL | tls: make sure to abort the stream if headers are bogus |
| CVE-2022-50491 | coresight: cti: Fix hang in cti_disable_hw() | |
| CVE-2023-53581 | net/mlx5e: Check for NOT_READY flag state after locking | |
| CVE-2023-53580 | USB: Gadget: core: Help prevent panic during UVC unconfigure | |
| CVE-2022-50507 | fs/ntfs3: Validate data run offset | |
| CVE-2022-50508 | wifi: mt76: mt76x0: fix oob access in mt76x0_phy_get_target_power | |
| CVE-2022-50506 | drbd: only clone bio if we have a backing device | |
| CVE-2022-50504 | powerpc/rtas: avoid scheduling in rtas_os_term() | |
| CVE-2022-50505 | iommu/amd: Fix pci device refcount leak in ppr_notifier() | |
| CVE-2022-50503 | mtd: lpddr2_nvm: Fix possible null-ptr-deref | |
| CVE-2022-50501 | media: coda: Add check for dcoda_iram_alloc | |
| CVE-2022-50500 | netdevsim: fix memory leak in nsim_drv_probe() when nsim_dev_resources_register() failed | |
| CVE-2022-50499 | media: dvb-core: Fix double free in dvb_register_device() | |
| CVE-2022-50497 | binfmt_misc: fix shift-out-of-bounds in check_special_flags | |
| CVE-2022-50498 | eth: alx: take rtnl_lock on resume | |
| CVE-2022-50496 | dm cache: Fix UAF in destroy() | |
| CVE-2022-50494 | thermal: intel_powerclamp: Use get_cpu() instead of smp_processor_id() to avoid crash | |
| CVE-2022-50493 | scsi: qla2xxx: Fix crash when I/O abort times out | |
| CVE-2022-50492 | drm/msm: fix use-after-free on probe deferral | |
| CVE-2023-53572 | clk: imx: scu: use _safe list iterator to avoid a use after free |
Showing top 20 of 144 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2025-39947
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