Vulnerability-Lookup

FKIE_CVE-2025-39947

Vulnerability from fkie_nvd - Published: 2025-10-04 08:15 - Updated: 2026-01-27 19:47

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2cb17c88edd3a1c7aa6bc880dcdb35a6866fcb2e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6b4be64fd9fec16418f365c2d8e47a7566e9eba5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8df354eb2dd63d111ed5ae2e956e0dbb22bcf93b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d1f3db4e7a3be29fc17f01850f162363f919370d	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.17
linux	linux_kernel	6.17
linux	linux_kernel	6.17
linux	linux_kernel	6.17
linux	linux_kernel	6.17
linux	linux_kernel	6.17

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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            {
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              "versionEndExcluding": "6.12.49",
              "versionStartIncluding": "6.7",
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "vulnerable": true
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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": "CVE-2025-39947",
  "lastModified": "2026-01-27T19:47:34.887",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-10-04T08:15:47.867",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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    },
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2025-39947 (GCVE-0-2025-39947)

Vulnerability from cvelistv5 – Published: 2025-10-04 07:31 – Updated: 2025-10-04 07:31

Title

net/mlx5e: Harden uplink netdev access against device unbind

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/2cb17c88edd3a1c7a…
	https://git.kernel.org/stable/c/d1f3db4e7a3be29fc…
	https://git.kernel.org/stable/c/8df354eb2dd63d111…
	https://git.kernel.org/stable/c/6b4be64fd9fec1641…

Impacted products

Vendor

Product

Version

Linux

Affected: 7a9fb35e8c3a67145fca262c304de65cb2f83abf , < 2cb17c88edd3a1c7aa6bc880dcdb35a6866fcb2e (git)
Affected: 7a9fb35e8c3a67145fca262c304de65cb2f83abf , < d1f3db4e7a3be29fc17f01850f162363f919370d (git)
Affected: 7a9fb35e8c3a67145fca262c304de65cb2f83abf , < 8df354eb2dd63d111ed5ae2e956e0dbb22bcf93b (git)
Affected: 7a9fb35e8c3a67145fca262c304de65cb2f83abf , < 6b4be64fd9fec16418f365c2d8e47a7566e9eba5 (git)

Linux

Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 6.6.108 , ≤ 6.6.* (semver)
Unaffected: 6.12.49 , ≤ 6.12.* (semver)
Unaffected: 6.16.9 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en_rep.c",
            "drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c",
            "drivers/net/ethernet/mellanox/mlx5/core/lib/mlx5.h",
            "include/linux/mlx5/driver.h"
          ],
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en_rep.c",
            "drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c",
            "drivers/net/ethernet/mellanox/mlx5/core/lib/mlx5.h",
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          ],
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.12.49",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.16.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-04T07:31:08.636Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/6b4be64fd9fec16418f365c2d8e47a7566e9eba5"
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      "title": "net/mlx5e: Harden uplink netdev access against device unbind",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39947",
    "datePublished": "2025-10-04T07:31:08.636Z",
    "dateReserved": "2025-04-16T07:20:57.148Z",
    "dateUpdated": "2025-10-04T07:31:08.636Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2025-39947

CVE-2025-39947 (GCVE-0-2025-39947)

Tags

Sightings

Nomenclature