Vulnerability-Lookup

FKIE_CVE-2022-49295

Vulnerability from fkie_nvd - Published: 2025-02-26 07:01 - Updated: 2026-08-04 10:17

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: nbd: call genl_unregister_family() first in nbd_cleanup() Otherwise there may be race between module removal and the handling of netlink command, which can lead to the oops as shown below: BUG: kernel NULL pointer dereference, address: 0000000000000098 Oops: 0002 [#1] SMP PTI CPU: 1 PID: 31299 Comm: nbd-client Tainted: G E 5.14.0-rc4 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:down_write+0x1a/0x50 Call Trace: start_creating+0x89/0x130 debugfs_create_dir+0x1b/0x130 nbd_start_device+0x13d/0x390 [nbd] nbd_genl_connect+0x42f/0x748 [nbd] genl_family_rcv_msg_doit.isra.0+0xec/0x150 genl_rcv_msg+0xe5/0x1e0 netlink_rcv_skb+0x55/0x100 genl_rcv+0x29/0x40 netlink_unicast+0x1a8/0x250 netlink_sendmsg+0x21b/0x430 ____sys_sendmsg+0x2a4/0x2d0 ___sys_sendmsg+0x81/0xc0 __sys_sendmsg+0x62/0xb0 __x64_sys_sendmsg+0x1f/0x30 do_syscall_64+0x3b/0xc0 entry_SYSCALL_64_after_hwframe+0x44/0xae Modules linked in: nbd(E-)

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/06c4da89c24e7023ea448cadf8e9daf06a0aae6e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1be608e1ee1f222464b2856bda9b85ab5184a33e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3d5da1ffba3388c2ae2e6c598855a4d887d3bf79	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6f505bbb8063fd3a238a4239d2d8c165e5279f6f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8a1435c862ea09b06be7acda325128dc08458e25	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c0868f6e728c3c28bef0e8bee89d2daf86a8bbca	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cbeafa7a79d08ecdb55f8f1d41a11323d0f709db	Patch

Impacted products

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

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/block/nbd.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8a1435c862ea09b06be7acda325128dc08458e25",
              "status": "affected",
              "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
              "versionType": "git"
            },
            {
              "lessThan": "013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5c",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "1be608e1ee1f222464b2856bda9b85ab5184a33e",
              "status": "affected",
              "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
              "versionType": "git"
            },
            {
              "lessThan": "c0868f6e728c3c28bef0e8bee89d2daf86a8bbca",
              "status": "affected",
              "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
              "versionType": "git"
            },
            {
              "lessThan": "cbeafa7a79d08ecdb55f8f1d41a11323d0f709db",
              "status": "affected",
              "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
              "versionType": "git"
            },
            {
              "lessThan": "3d5da1ffba3388c2ae2e6c598855a4d887d3bf79",
              "status": "affected",
              "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/block/nbd.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.12"
            },
            {
              "lessThan": "4.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.283",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.247",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.198",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.122",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.47",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.15",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "42074657-A7B6-4740-88B7-67B440018C1C",
              "versionEndExcluding": "4.14.283",
              "vulnerable": true
            },
            {
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              "versionEndExcluding": "4.19.247",
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              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3EC49633-14DE-4EBD-BB80-76AE2E3EABB9",
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              "versionStartIncluding": "4.20",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1B42AA01-44D8-4572-95E6-FF8E374CF9C5",
              "versionEndExcluding": "5.10.122",
              "versionStartIncluding": "5.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FC042EE3-4864-4325-BE0B-4BCDBF11AA61",
              "versionEndExcluding": "5.15.47",
              "versionStartIncluding": "5.11",
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            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "53E7AA2E-2FB4-45CA-A22B-08B4EDBB51AD",
              "versionEndExcluding": "5.17.15",
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              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FA6D643C-6D6A-4821-8A8D-B5776B8F0103",
              "versionEndExcluding": "5.18.4",
              "versionStartIncluding": "5.18",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: call genl_unregister_family() first in nbd_cleanup()\n\nOtherwise there may be race between module removal and the handling of\nnetlink command, which can lead to the oops as shown below:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000098\n  Oops: 0002 [#1] SMP PTI\n  CPU: 1 PID: 31299 Comm: nbd-client Tainted: G            E     5.14.0-rc4\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)\n  RIP: 0010:down_write+0x1a/0x50\n  Call Trace:\n   start_creating+0x89/0x130\n   debugfs_create_dir+0x1b/0x130\n   nbd_start_device+0x13d/0x390 [nbd]\n   nbd_genl_connect+0x42f/0x748 [nbd]\n   genl_family_rcv_msg_doit.isra.0+0xec/0x150\n   genl_rcv_msg+0xe5/0x1e0\n   netlink_rcv_skb+0x55/0x100\n   genl_rcv+0x29/0x40\n   netlink_unicast+0x1a8/0x250\n   netlink_sendmsg+0x21b/0x430\n   ____sys_sendmsg+0x2a4/0x2d0\n   ___sys_sendmsg+0x81/0xc0\n   __sys_sendmsg+0x62/0xb0\n   __x64_sys_sendmsg+0x1f/0x30\n   do_syscall_64+0x3b/0xc0\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n  Modules linked in: nbd(E-)"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nbd: llamar a genl_unregister_family() primero en nbd_cleanup() De lo contrario, puede haber una ejecuci\u00f3n entre la eliminaci\u00f3n del m\u00f3dulo y la gesti\u00f3n del comando netlink, lo que puede provocar los errores que se muestran a continuaci\u00f3n: ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000098 Error: 0002 [#1] SMP PTI CPU: 1 PID: 31299 Comm: nbd-client Contaminado: GE 5.14.0-rc4 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:down_write+0x1a/0x50 Rastreo de llamadas: start_creating+0x89/0x130 debugfs_create_dir+0x1b/0x130 nbd_start_device+0x13d/0x390 [nbd] nbd_genl_connect+0x42f/0x748 [nbd] genl_family_rcv_msg_doit.isra.0+0xec/0x150 genl_rcv_msg+0xe5/0x1e0 netlink_rcv_skb+0x55/0x100 genl_rcv+0x29/0x40 netlink_unicast+0x1a8/0x250 netlink_sendmsg+0x21b/0x430 ____sys_sendmsg+0x2a4/0x2d0 ___sys_sendmsg+0x81/0xc0 __sys_sendmsg+0x62/0xb0 __x64_sys_sendmsg+0x1f/0x30 do_syscall_64+0x3b/0xc0 entry_SYSCALL_64_after_hwframe+0x44/0xae M\u00f3dulos vinculados en: nbd(E-)"
    }
  ],
  "id": "CVE-2022-49295",
  "lastModified": "2026-08-04T10:17:43.723",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.0,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-49295",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-10-01T19:45:04.172443Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-02-26T07:01:06.333",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/06c4da89c24e7023ea448cadf8e9daf06a0aae6e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/c0868f6e728c3c28bef0e8bee89d2daf86a8bbca"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/cbeafa7a79d08ecdb55f8f1d41a11323d0f709db"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

CVE-2022-49295 (GCVE-0-2022-49295)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:01 – Updated: 2026-08-05 08:54

Title

nbd: call genl_unregister_family() first in nbd_cleanup()

Summary

Severity

7 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

4.7 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-01 19:45 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/8a1435c862ea09b06…
https://git.kernel.org/stable/c/013a79f1b5c89290e…
https://git.kernel.org/stable/c/1be608e1ee1f22246…
https://git.kernel.org/stable/c/c0868f6e728c3c28b…
https://git.kernel.org/stable/c/cbeafa7a79d08ecdb…
https://git.kernel.org/stable/c/6f505bbb8063fd3a2…
https://git.kernel.org/stable/c/3d5da1ffba3388c2a…
https://git.kernel.org/stable/c/06c4da89c24e7023e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e46c7287b1c27683a8e30ca825fb98e2b97f1099 , < 8a1435c862ea09b06be7acda325128dc08458e25 (git) Affected: e46c7287b1c27683a8e30ca825fb98e2b97f1099 , < 013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5c (git) Affected: e46c7287b1c27683a8e30ca825fb98e2b97f1099 , < 1be608e1ee1f222464b2856bda9b85ab5184a33e (git) Affected: e46c7287b1c27683a8e30ca825fb98e2b97f1099 , < c0868f6e728c3c28bef0e8bee89d2daf86a8bbca (git) Affected: e46c7287b1c27683a8e30ca825fb98e2b97f1099 , < cbeafa7a79d08ecdb55f8f1d41a11323d0f709db (git) Affected: e46c7287b1c27683a8e30ca825fb98e2b97f1099 , < 6f505bbb8063fd3a238a4239d2d8c165e5279f6f (git) Affected: e46c7287b1c27683a8e30ca825fb98e2b97f1099 , < 3d5da1ffba3388c2ae2e6c598855a4d887d3bf79 (git) Affected: e46c7287b1c27683a8e30ca825fb98e2b97f1099 , < 06c4da89c24e7023ea448cadf8e9daf06a0aae6e (git)
Linux	Linux	Affected: 4.12 Unaffected: 0 , < 4.12 (semver) Unaffected: 4.14.283 , ≤ 4.14.* (semver) Unaffected: 4.19.247 , ≤ 4.19.* (semver) Unaffected: 5.4.198 , ≤ 5.4.* (semver) Unaffected: 5.10.122 , ≤ 5.10.* (semver) Unaffected: 5.15.47 , ≤ 5.15.* (semver) Unaffected: 5.17.15 , ≤ 5.17.* (semver) Unaffected: 5.18.4 , ≤ 5.18.* (semver) Unaffected: 5.19 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 4.7,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-49295",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T19:45:04.172443Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-476",
                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T19:46:59.873Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/block/nbd.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8a1435c862ea09b06be7acda325128dc08458e25",
              "status": "affected",
              "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
              "versionType": "git"
            },
            {
              "lessThan": "013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5c",
              "status": "affected",
              "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
              "versionType": "git"
            },
            {
              "lessThan": "1be608e1ee1f222464b2856bda9b85ab5184a33e",
              "status": "affected",
              "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
              "versionType": "git"
            },
            {
              "lessThan": "c0868f6e728c3c28bef0e8bee89d2daf86a8bbca",
              "status": "affected",
              "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
              "versionType": "git"
            },
            {
              "lessThan": "cbeafa7a79d08ecdb55f8f1d41a11323d0f709db",
              "status": "affected",
              "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
              "versionType": "git"
            },
            {
              "lessThan": "6f505bbb8063fd3a238a4239d2d8c165e5279f6f",
              "status": "affected",
              "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
              "versionType": "git"
            },
            {
              "lessThan": "3d5da1ffba3388c2ae2e6c598855a4d887d3bf79",
              "status": "affected",
              "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
              "versionType": "git"
            },
            {
              "lessThan": "06c4da89c24e7023ea448cadf8e9daf06a0aae6e",
              "status": "affected",
              "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/block/nbd.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.12"
            },
            {
              "lessThan": "4.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.283",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.247",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.198",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.122",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.47",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.15",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.283",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.247",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.198",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.122",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.47",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.17.15",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18.4",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: call genl_unregister_family() first in nbd_cleanup()\n\nOtherwise there may be race between module removal and the handling of\nnetlink command, which can lead to the oops as shown below:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000098\n  Oops: 0002 [#1] SMP PTI\n  CPU: 1 PID: 31299 Comm: nbd-client Tainted: G            E     5.14.0-rc4\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)\n  RIP: 0010:down_write+0x1a/0x50\n  Call Trace:\n   start_creating+0x89/0x130\n   debugfs_create_dir+0x1b/0x130\n   nbd_start_device+0x13d/0x390 [nbd]\n   nbd_genl_connect+0x42f/0x748 [nbd]\n   genl_family_rcv_msg_doit.isra.0+0xec/0x150\n   genl_rcv_msg+0xe5/0x1e0\n   netlink_rcv_skb+0x55/0x100\n   genl_rcv+0x29/0x40\n   netlink_unicast+0x1a8/0x250\n   netlink_sendmsg+0x21b/0x430\n   ____sys_sendmsg+0x2a4/0x2d0\n   ___sys_sendmsg+0x81/0xc0\n   __sys_sendmsg+0x62/0xb0\n   __x64_sys_sendmsg+0x1f/0x30\n   do_syscall_64+0x3b/0xc0\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n  Modules linked in: nbd(E-)"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerability is reached via local Generic Netlink sendmsg to the nbd family (and concurrent local delete_module); it is not reachable from network packets or remote protocols.\nAC:H - Exploitation requires winning a race against nbd module removal (rmmod/delete_module), which an unprivileged attacker cannot initiate and which depends on a privileged actor unloading the module.\nPR:L - NBD_CMD_STATUS has no capability check and is usable by an unprivileged local user, so the cleanup race can be exercised without CAP_SYS_ADMIN; CAP_SYS_ADMIN in init_user_ns is only required for connect/disconnect/reconfigure.\nUI:N - No victim interaction is required; the attacker only needs to send netlink commands while the module exit path runs.\nS:U - Impact remains within the local kernel\u2019s authority; this is not a VM escape, IOMMU bypass, or other cross-boundary breakout.\nC:H - The race is a use-after-free of nbd/debugfs/idr state during teardown, which can be leveraged for disclosure of freed kernel memory contents under the higher-severity UAF scoring rule.\nI:H - The same UAF on kernel objects during module cleanup can be abused for corruption/control-flow hijack primitives, not merely a crash.\nA:H - The documented outcome is a kernel NULL pointer dereference oops during nbd_genl_connect while the module is going away, which is a full availability impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:54:41.429Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8a1435c862ea09b06be7acda325128dc08458e25"
        },
        {
          "url": "https://git.kernel.org/stable/c/013a79f1b5c89290e2e97f1ebf14b14e0cf5fe5c"
        },
        {
          "url": "https://git.kernel.org/stable/c/1be608e1ee1f222464b2856bda9b85ab5184a33e"
        },
        {
          "url": "https://git.kernel.org/stable/c/c0868f6e728c3c28bef0e8bee89d2daf86a8bbca"
        },
        {
          "url": "https://git.kernel.org/stable/c/cbeafa7a79d08ecdb55f8f1d41a11323d0f709db"
        },
        {
          "url": "https://git.kernel.org/stable/c/6f505bbb8063fd3a238a4239d2d8c165e5279f6f"
        },
        {
          "url": "https://git.kernel.org/stable/c/3d5da1ffba3388c2ae2e6c598855a4d887d3bf79"
        },
        {
          "url": "https://git.kernel.org/stable/c/06c4da89c24e7023ea448cadf8e9daf06a0aae6e"
        }
      ],
      "title": "nbd: call genl_unregister_family() first in nbd_cleanup()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49295",
    "datePublished": "2025-02-26T02:01:25.659Z",
    "dateReserved": "2025-02-26T01:49:39.302Z",
    "dateUpdated": "2026-08-05T08:54:41.429Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.
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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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FKIE_CVE-2022-49295

CVE-2022-49295 (GCVE-0-2022-49295)

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Sightings

Nomenclature

Related by attack behaviour