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CVE-2022-50002 (GCVE-0-2022-50002)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:01 – Updated: 2026-05-11 19:10
VLAI
Title
net/mlx5: LAG, fix logic over MLX5_LAG_FLAG_NDEVS_READY
Summary
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: LAG, fix logic over MLX5_LAG_FLAG_NDEVS_READY Only set MLX5_LAG_FLAG_NDEVS_READY if both netdevices are registered. Doing so guarantees that both ldev->pf[MLX5_LAG_P0].dev and ldev->pf[MLX5_LAG_P1].dev have valid pointers when MLX5_LAG_FLAG_NDEVS_READY is set. The core issue is asymmetry in setting MLX5_LAG_FLAG_NDEVS_READY and clearing it. Setting it is done wrongly when both ldev->pf[MLX5_LAG_P0].dev and ldev->pf[MLX5_LAG_P1].dev are set; clearing it is done right when either of ldev->pf[i].netdev is cleared. Consider the following scenario: 1. PF0 loads and sets ldev->pf[MLX5_LAG_P0].dev to a valid pointer 2. PF1 loads and sets both ldev->pf[MLX5_LAG_P1].dev and ldev->pf[MLX5_LAG_P1].netdev with valid pointers. This results in MLX5_LAG_FLAG_NDEVS_READY is set. 3. PF0 is unloaded before setting dev->pf[MLX5_LAG_P0].netdev. MLX5_LAG_FLAG_NDEVS_READY remains set. Further execution of mlx5_do_bond() will result in null pointer dereference when calling mlx5_lag_is_multipath() This patch fixes the following call trace actually encountered: [ 1293.475195] BUG: kernel NULL pointer dereference, address: 00000000000009a8 [ 1293.478756] #PF: supervisor read access in kernel mode [ 1293.481320] #PF: error_code(0x0000) - not-present page [ 1293.483686] PGD 0 P4D 0 [ 1293.484434] Oops: 0000 [#1] SMP PTI [ 1293.485377] CPU: 1 PID: 23690 Comm: kworker/u16:2 Not tainted 5.18.0-rc5_for_upstream_min_debug_2022_05_05_10_13 #1 [ 1293.488039] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 [ 1293.490836] Workqueue: mlx5_lag mlx5_do_bond_work [mlx5_core] [ 1293.492448] RIP: 0010:mlx5_lag_is_multipath+0x5/0x50 [mlx5_core] [ 1293.494044] Code: e8 70 40 ff e0 48 8b 14 24 48 83 05 5c 1a 1b 00 01 e9 19 ff ff ff 48 83 05 47 1a 1b 00 01 eb d7 0f 1f 44 00 00 0f 1f 44 00 00 <48> 8b 87 a8 09 00 00 48 85 c0 74 26 48 83 05 a7 1b 1b 00 01 41 b8 [ 1293.498673] RSP: 0018:ffff88811b2fbe40 EFLAGS: 00010202 [ 1293.500152] RAX: ffff88818a94e1c0 RBX: ffff888165eca6c0 RCX: 0000000000000000 [ 1293.501841] RDX: 0000000000000001 RSI: ffff88818a94e1c0 RDI: 0000000000000000 [ 1293.503585] RBP: 0000000000000000 R08: ffff888119886740 R09: ffff888165eca73c [ 1293.505286] R10: 0000000000000018 R11: 0000000000000018 R12: ffff88818a94e1c0 [ 1293.506979] R13: ffff888112729800 R14: 0000000000000000 R15: ffff888112729858 [ 1293.508753] FS: 0000000000000000(0000) GS:ffff88852cc40000(0000) knlGS:0000000000000000 [ 1293.510782] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1293.512265] CR2: 00000000000009a8 CR3: 00000001032d4002 CR4: 0000000000370ea0 [ 1293.514001] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1293.515806] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8a66e45859797e5dd77ff17dd37781f99d5f5b9b , < 4c040acf5744e87a7b3490f9ec8bedd0d15c9f29 (git)
Affected: 8a66e45859797e5dd77ff17dd37781f99d5f5b9b , < a6e675a66175869b7d87c0e1dd0ddf93e04f8098 (git)
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Linux Linux Affected: 5.14
Unaffected: 0 , < 5.14 (semver)
Unaffected: 5.19.6 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
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      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: LAG, fix logic over MLX5_LAG_FLAG_NDEVS_READY\n\nOnly set MLX5_LAG_FLAG_NDEVS_READY if both netdevices are registered.\nDoing so guarantees that both ldev-\u003epf[MLX5_LAG_P0].dev and\nldev-\u003epf[MLX5_LAG_P1].dev have valid pointers when\nMLX5_LAG_FLAG_NDEVS_READY is set.\n\nThe core issue is asymmetry in setting MLX5_LAG_FLAG_NDEVS_READY and\nclearing it. Setting it is done wrongly when both\nldev-\u003epf[MLX5_LAG_P0].dev and ldev-\u003epf[MLX5_LAG_P1].dev are set;\nclearing it is done right when either of ldev-\u003epf[i].netdev is cleared.\n\nConsider the following scenario:\n1. PF0 loads and sets ldev-\u003epf[MLX5_LAG_P0].dev to a valid pointer\n2. PF1 loads and sets both ldev-\u003epf[MLX5_LAG_P1].dev and\n   ldev-\u003epf[MLX5_LAG_P1].netdev with valid pointers. This results in\n   MLX5_LAG_FLAG_NDEVS_READY is set.\n3. PF0 is unloaded before setting dev-\u003epf[MLX5_LAG_P0].netdev.\n   MLX5_LAG_FLAG_NDEVS_READY remains set.\n\nFurther execution of mlx5_do_bond() will result in null pointer\ndereference when calling mlx5_lag_is_multipath()\n\nThis patch fixes the following call trace actually encountered:\n\n[ 1293.475195] BUG: kernel NULL pointer dereference, address: 00000000000009a8\n[ 1293.478756] #PF: supervisor read access in kernel mode\n[ 1293.481320] #PF: error_code(0x0000) - not-present page\n[ 1293.483686] PGD 0 P4D 0\n[ 1293.484434] Oops: 0000 [#1] SMP PTI\n[ 1293.485377] CPU: 1 PID: 23690 Comm: kworker/u16:2 Not tainted 5.18.0-rc5_for_upstream_min_debug_2022_05_05_10_13 #1\n[ 1293.488039] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n[ 1293.490836] Workqueue: mlx5_lag mlx5_do_bond_work [mlx5_core]\n[ 1293.492448] RIP: 0010:mlx5_lag_is_multipath+0x5/0x50 [mlx5_core]\n[ 1293.494044] Code: e8 70 40 ff e0 48 8b 14 24 48 83 05 5c 1a 1b 00 01 e9 19 ff ff ff 48 83 05 47 1a 1b 00 01 eb d7 0f 1f 44 00 00 0f 1f 44 00 00 \u003c48\u003e 8b 87 a8 09 00 00 48 85 c0 74 26 48 83 05 a7 1b 1b 00 01 41 b8\n[ 1293.498673] RSP: 0018:ffff88811b2fbe40 EFLAGS: 00010202\n[ 1293.500152] RAX: ffff88818a94e1c0 RBX: ffff888165eca6c0 RCX: 0000000000000000\n[ 1293.501841] RDX: 0000000000000001 RSI: ffff88818a94e1c0 RDI: 0000000000000000\n[ 1293.503585] RBP: 0000000000000000 R08: ffff888119886740 R09: ffff888165eca73c\n[ 1293.505286] R10: 0000000000000018 R11: 0000000000000018 R12: ffff88818a94e1c0\n[ 1293.506979] R13: ffff888112729800 R14: 0000000000000000 R15: ffff888112729858\n[ 1293.508753] FS:  0000000000000000(0000) GS:ffff88852cc40000(0000) knlGS:0000000000000000\n[ 1293.510782] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 1293.512265] CR2: 00000000000009a8 CR3: 00000001032d4002 CR4: 0000000000370ea0\n[ 1293.514001] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 1293.515806] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400"
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        "dateUpdated": "2026-05-11T19:10:49.568Z",
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        {
          "url": "https://git.kernel.org/stable/c/a6e675a66175869b7d87c0e1dd0ddf93e04f8098"
        }
      ],
      "title": "net/mlx5: LAG, fix logic over MLX5_LAG_FLAG_NDEVS_READY",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50002",
    "datePublished": "2025-06-18T11:01:02.653Z",
    "dateReserved": "2025-06-18T10:57:27.387Z",
    "dateUpdated": "2026-05-11T19:10:49.568Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
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      "date": "2026-09-20",
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      "percentile": "0.14065"
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        "configurations": [
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: LAG, fix logic over MLX5_LAG_FLAG_NDEVS_READY\n\nOnly set MLX5_LAG_FLAG_NDEVS_READY if both netdevices are registered.\nDoing so guarantees that both ldev-\u003epf[MLX5_LAG_P0].dev and\nldev-\u003epf[MLX5_LAG_P1].dev have valid pointers when\nMLX5_LAG_FLAG_NDEVS_READY is set.\n\nThe core issue is asymmetry in setting MLX5_LAG_FLAG_NDEVS_READY and\nclearing it. Setting it is done wrongly when both\nldev-\u003epf[MLX5_LAG_P0].dev and ldev-\u003epf[MLX5_LAG_P1].dev are set;\nclearing it is done right when either of ldev-\u003epf[i].netdev is cleared.\n\nConsider the following scenario:\n1. PF0 loads and sets ldev-\u003epf[MLX5_LAG_P0].dev to a valid pointer\n2. PF1 loads and sets both ldev-\u003epf[MLX5_LAG_P1].dev and\n   ldev-\u003epf[MLX5_LAG_P1].netdev with valid pointers. This results in\n   MLX5_LAG_FLAG_NDEVS_READY is set.\n3. PF0 is unloaded before setting dev-\u003epf[MLX5_LAG_P0].netdev.\n   MLX5_LAG_FLAG_NDEVS_READY remains set.\n\nFurther execution of mlx5_do_bond() will result in null pointer\ndereference when calling mlx5_lag_is_multipath()\n\nThis patch fixes the following call trace actually encountered:\n\n[ 1293.475195] BUG: kernel NULL pointer dereference, address: 00000000000009a8\n[ 1293.478756] #PF: supervisor read access in kernel mode\n[ 1293.481320] #PF: error_code(0x0000) - not-present page\n[ 1293.483686] PGD 0 P4D 0\n[ 1293.484434] Oops: 0000 [#1] SMP PTI\n[ 1293.485377] CPU: 1 PID: 23690 Comm: kworker/u16:2 Not tainted 5.18.0-rc5_for_upstream_min_debug_2022_05_05_10_13 #1\n[ 1293.488039] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n[ 1293.490836] Workqueue: mlx5_lag mlx5_do_bond_work [mlx5_core]\n[ 1293.492448] RIP: 0010:mlx5_lag_is_multipath+0x5/0x50 [mlx5_core]\n[ 1293.494044] Code: e8 70 40 ff e0 48 8b 14 24 48 83 05 5c 1a 1b 00 01 e9 19 ff ff ff 48 83 05 47 1a 1b 00 01 eb d7 0f 1f 44 00 00 0f 1f 44 00 00 \u003c48\u003e 8b 87 a8 09 00 00 48 85 c0 74 26 48 83 05 a7 1b 1b 00 01 41 b8\n[ 1293.498673] RSP: 0018:ffff88811b2fbe40 EFLAGS: 00010202\n[ 1293.500152] RAX: ffff88818a94e1c0 RBX: ffff888165eca6c0 RCX: 0000000000000000\n[ 1293.501841] RDX: 0000000000000001 RSI: ffff88818a94e1c0 RDI: 0000000000000000\n[ 1293.503585] RBP: 0000000000000000 R08: ffff888119886740 R09: ffff888165eca73c\n[ 1293.505286] R10: 0000000000000018 R11: 0000000000000018 R12: ffff88818a94e1c0\n[ 1293.506979] R13: ffff888112729800 R14: 0000000000000000 R15: ffff888112729858\n[ 1293.508753] FS:  0000000000000000(0000) GS:ffff88852cc40000(0000) knlGS:0000000000000000\n[ 1293.510782] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 1293.512265] CR2: 00000000000009a8 CR3: 00000001032d4002 CR4: 0000000000370ea0\n[ 1293.514001] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 1293.515806] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/mlx5: LAG, corregir la l\u00f3gica sobre MLX5_LAG_FLAG_NDEVS_READY Solo establezca MLX5_LAG_FLAG_NDEVS_READY si ambos dispositivos de red est\u00e1n registrados. Hacerlo garantiza que tanto ldev-\u0026gt;pf[MLX5_LAG_P0].dev como ldev-\u0026gt;pf[MLX5_LAG_P1].dev tengan punteros v\u00e1lidos cuando MLX5_LAG_FLAG_NDEVS_READY est\u00e9 establecido. El problema principal es la asimetr\u00eda en la configuraci\u00f3n de MLX5_LAG_FLAG_NDEVS_READY y su borrado. La configuraci\u00f3n se realiza incorrectamente cuando tanto ldev-\u0026gt;pf[MLX5_LAG_P0].dev como ldev-\u0026gt;pf[MLX5_LAG_P1].dev est\u00e1n establecidos; Se borra correctamente cuando se borra ldev-\u0026gt;pf[i].netdev. Considere el siguiente escenario: 1. PF0 carga y asigna un puntero v\u00e1lido a ldev-\u0026gt;pf[MLX5_LAG_P0].dev. 2. PF1 carga y asigna punteros v\u00e1lidos a ldev-\u0026gt;pf[MLX5_LAG_P1].dev y ldev-\u0026gt;pf[MLX5_LAG_P1].netdev. Esto da como resultado que MLX5_LAG_FLAG_NDEVS_READY se configure. 3. PF0 se descarga antes de asignar dev-\u0026gt;pf[MLX5_LAG_P0].netdev. MLX5_LAG_FLAG_NDEVS_READY permanece configurado. La ejecuci\u00f3n posterior de mlx5_do_bond() dar\u00e1 como resultado una desreferencia de puntero nulo al llamar a mlx5_lag_is_multipath(). Este parche corrige el siguiente seguimiento de llamada encontrado: [ 1293.475195] ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 00000000000009a8 [ 1293.478756] #PF: acceso de lectura del supervisor en modo kernel [ 1293.481320] #PF: error_code(0x0000) - p\u00e1gina no presente [ 1293.483686] PGD 0 P4D 0 [ 1293.484434] Oops: 0000 [#1] SMP PTI [ 1293.485377] CPU: 1 PID: 23690 Comm: kworker/u16:2 No contaminado 5.18.0-rc5_for_upstream_min_debug_2022_05_05_10_13 #1 [ 1293.488039] Nombre del hardware: PC est\u00e1ndar QEMU (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 01/04/2014 [ 1293.490836] Cola de trabajo: mlx5_lag mlx5_do_bond_work [mlx5_core] [ 1293.492448] RIP: 0010:mlx5_lag_is_multipath+0x5/0x50 [mlx5_core] [ 1293.494044] C\u00f3digo: e8 70 40 ff e0 48 8b 14 24 48 83 05 5c 1a 1b 00 01 e9 19 ff ff ff 48 83 05 47 1a 1b 00 01 eb d7 0f 1f 44 00 00 0f 1f 44 00 00 \u0026lt;48\u0026gt; 8b 87 a8 09 00 00 48 85 c0 74 26 48 83 05 a7 1b 1b 00 01 41 b8 [ 1293.498673] RSP: 0018:ffff88811b2fbe40 EFLAGS: 00010202 [ 1293.500152] RAX: ffff88818a94e1c0 RBX: ffff888165eca6c0 RCX: 0000000000000000 [ 1293.501841] RDX: 0000000000000001 RSI: ffff88818a94e1c0 RDI: 0000000000000000 [ 1293.503585] RBP: 0000000000000000 R08: ffff888119886740 R09: ffff888165eca73c [ 1293.505286] R10: 0000000000000018 R11: 0000000000000018 R12: ffff88818a94e1c0 [ 1293.506979] R13: ffff888112729800 R14: 0000000000000000 R15: ffff888112729858 [ 1293.508753] FS: 000000000000000(0000) GS:ffff88852cc40000(0000) knlGS:0000000000000000 [ 1293.510782] CS: 0010 DS: 0000 ES: 0000 CR0: 000000080050033 [ 1293.512265] CR2: 00000000000009a8 CR3: 00000001032d4002 CR4: 0000000000370ea0 [ 1293.514001] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1293.515806] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400"
          }
        ],
        "id": "CVE-2022-50002",
        "lastModified": "2026-06-17T05:22:31.917",
        "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": "2025-06-18T11:15:28.063",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/4c040acf5744e87a7b3490f9ec8bedd0d15c9f29"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/a6e675a66175869b7d87c0e1dd0ddf93e04f8098"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:34:52+00:00",
      "cve": "CVE-2022-50002",
      "id": "CVE-2022-50002",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "321",
      "product_status:known_affected": "52",
      "product_status:known_not_affected": "104",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net/mlx5: LAG, fix logic over MLX5_LAG_FLAG_NDEVS_READY",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50002.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-01T01:25:38Z",
      "cve": "CVE-2022-50002",
      "id": "CVE-2022-50002",
      "initial_release_date": "2025-06-19T03:44:19Z",
      "product_status:known_affected": "430",
      "product_status:known_not_affected": "384",
      "product_status:recommended": "139",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50002",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50002.json",
      "version": "37"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.