CVE-2026-22996 (GCVE-0-2026-22996)

Vulnerability from cvelistv5 – Published: 2026-01-25 14:36 – Updated: 2026-02-09 08:36
VLAI?
Title
net/mlx5e: Don't store mlx5e_priv in mlx5e_dev devlink priv
Summary
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Don't store mlx5e_priv in mlx5e_dev devlink priv mlx5e_priv is an unstable structure that can be memset(0) if profile attaching fails, mlx5e_priv in mlx5e_dev devlink private is used to reference the netdev and mdev associated with that struct. Instead, store netdev directly into mlx5e_dev and get mdev from the containing mlx5_adev aux device structure. This fixes a kernel oops in mlx5e_remove when switchdev mode fails due to change profile failure. $ devlink dev eswitch set pci/0000:00:03.0 mode switchdev Error: mlx5_core: Failed setting eswitch to offloads. dmesg: workqueue: Failed to create a rescuer kthread for wq "mlx5e": -EINTR mlx5_core 0012:03:00.1: mlx5e_netdev_init_profile:6214:(pid 37199): mlx5e_priv_init failed, err=-12 mlx5_core 0012:03:00.1 gpu3rdma1: mlx5e_netdev_change_profile: new profile init failed, -12 workqueue: Failed to create a rescuer kthread for wq "mlx5e": -EINTR mlx5_core 0012:03:00.1: mlx5e_netdev_init_profile:6214:(pid 37199): mlx5e_priv_init failed, err=-12 mlx5_core 0012:03:00.1 gpu3rdma1: mlx5e_netdev_change_profile: failed to rollback to orig profile, -12 $ devlink dev reload pci/0000:00:03.0 ==> oops BUG: kernel NULL pointer dereference, address: 0000000000000520 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP NOPTI CPU: 3 UID: 0 PID: 521 Comm: devlink Not tainted 6.18.0-rc5+ #117 PREEMPT(voluntary) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40 04/01/2014 RIP: 0010:mlx5e_remove+0x68/0x130 RSP: 0018:ffffc900034838f0 EFLAGS: 00010246 RAX: ffff88810283c380 RBX: ffff888101874400 RCX: ffffffff826ffc45 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffff888102d789c0 R08: ffff8881007137f0 R09: ffff888100264e10 R10: ffffc90003483898 R11: ffffc900034838a0 R12: ffff888100d261a0 R13: ffff888100d261a0 R14: ffff8881018749a0 R15: ffff888101874400 FS: 00007f8565fea740(0000) GS:ffff88856a759000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000520 CR3: 000000010b11a004 CR4: 0000000000370ef0 Call Trace: <TASK> device_release_driver_internal+0x19c/0x200 bus_remove_device+0xc6/0x130 device_del+0x160/0x3d0 ? devl_param_driverinit_value_get+0x2d/0x90 mlx5_detach_device+0x89/0xe0 mlx5_unload_one_devl_locked+0x3a/0x70 mlx5_devlink_reload_down+0xc8/0x220 devlink_reload+0x7d/0x260 devlink_nl_reload_doit+0x45b/0x5a0 genl_family_rcv_msg_doit+0xe8/0x140
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c4d7eb57687f358cd498ea3624519236af8db97e , < dcb2ad755a16cb0ecd2dc98234d71a6e216ae7fe (git)
Affected: c4d7eb57687f358cd498ea3624519236af8db97e , < a3d4f87d41f5140f1cf5c02fce5cdad2637f6244 (git)
Affected: c4d7eb57687f358cd498ea3624519236af8db97e , < 123eda2e5b1638e298e3a66bb1e64a8da92de5e1 (git)
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    Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 6.12.67 , ≤ 6.12.* (semver)
Unaffected: 6.18.7 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en.h",
            "drivers/net/ethernet/mellanox/mlx5/core/en_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "dcb2ad755a16cb0ecd2dc98234d71a6e216ae7fe",
              "status": "affected",
              "version": "c4d7eb57687f358cd498ea3624519236af8db97e",
              "versionType": "git"
            },
            {
              "lessThan": "a3d4f87d41f5140f1cf5c02fce5cdad2637f6244",
              "status": "affected",
              "version": "c4d7eb57687f358cd498ea3624519236af8db97e",
              "versionType": "git"
            },
            {
              "lessThan": "123eda2e5b1638e298e3a66bb1e64a8da92de5e1",
              "status": "affected",
              "version": "c4d7eb57687f358cd498ea3624519236af8db97e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en.h",
            "drivers/net/ethernet/mellanox/mlx5/core/en_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "lessThan": "5.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.67",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.67",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.7",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Don\u0027t store mlx5e_priv in mlx5e_dev devlink priv\n\nmlx5e_priv is an unstable structure that can be memset(0) if profile\nattaching fails, mlx5e_priv in mlx5e_dev devlink private is used to\nreference the netdev and mdev associated with that struct. Instead,\nstore netdev directly into mlx5e_dev and get mdev from the containing\nmlx5_adev aux device structure.\n\nThis fixes a kernel oops in mlx5e_remove when switchdev mode fails due\nto change profile failure.\n\n$ devlink dev eswitch set pci/0000:00:03.0 mode switchdev\nError: mlx5_core: Failed setting eswitch to offloads.\ndmesg:\nworkqueue: Failed to create a rescuer kthread for wq \"mlx5e\": -EINTR\nmlx5_core 0012:03:00.1: mlx5e_netdev_init_profile:6214:(pid 37199): mlx5e_priv_init failed, err=-12\nmlx5_core 0012:03:00.1 gpu3rdma1: mlx5e_netdev_change_profile: new profile init failed, -12\nworkqueue: Failed to create a rescuer kthread for wq \"mlx5e\": -EINTR\nmlx5_core 0012:03:00.1: mlx5e_netdev_init_profile:6214:(pid 37199): mlx5e_priv_init failed, err=-12\nmlx5_core 0012:03:00.1 gpu3rdma1: mlx5e_netdev_change_profile: failed to rollback to orig profile, -12\n\n$ devlink dev reload pci/0000:00:03.0 ==\u003e oops\n\nBUG: kernel NULL pointer dereference, address: 0000000000000520\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\nPGD 0 P4D 0\nOops: Oops: 0000 [#1] SMP NOPTI\nCPU: 3 UID: 0 PID: 521 Comm: devlink Not tainted 6.18.0-rc5+ #117 PREEMPT(voluntary)\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40 04/01/2014\nRIP: 0010:mlx5e_remove+0x68/0x130\nRSP: 0018:ffffc900034838f0 EFLAGS: 00010246\nRAX: ffff88810283c380 RBX: ffff888101874400 RCX: ffffffff826ffc45\nRDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000\nRBP: ffff888102d789c0 R08: ffff8881007137f0 R09: ffff888100264e10\nR10: ffffc90003483898 R11: ffffc900034838a0 R12: ffff888100d261a0\nR13: ffff888100d261a0 R14: ffff8881018749a0 R15: ffff888101874400\nFS:  00007f8565fea740(0000) GS:ffff88856a759000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000000520 CR3: 000000010b11a004 CR4: 0000000000370ef0\nCall Trace:\n \u003cTASK\u003e\n device_release_driver_internal+0x19c/0x200\n bus_remove_device+0xc6/0x130\n device_del+0x160/0x3d0\n ? devl_param_driverinit_value_get+0x2d/0x90\n mlx5_detach_device+0x89/0xe0\n mlx5_unload_one_devl_locked+0x3a/0x70\n mlx5_devlink_reload_down+0xc8/0x220\n devlink_reload+0x7d/0x260\n devlink_nl_reload_doit+0x45b/0x5a0\n genl_family_rcv_msg_doit+0xe8/0x140"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T08:36:47.852Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/dcb2ad755a16cb0ecd2dc98234d71a6e216ae7fe"
        },
        {
          "url": "https://git.kernel.org/stable/c/a3d4f87d41f5140f1cf5c02fce5cdad2637f6244"
        },
        {
          "url": "https://git.kernel.org/stable/c/123eda2e5b1638e298e3a66bb1e64a8da92de5e1"
        }
      ],
      "title": "net/mlx5e: Don\u0027t store mlx5e_priv in mlx5e_dev devlink priv",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-22996",
    "datePublished": "2026-01-25T14:36:11.195Z",
    "dateReserved": "2026-01-13T15:37:45.938Z",
    "dateUpdated": "2026-02-09T08:36:47.852Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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  • 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.
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