Vulnerability-Lookup

FKIE_CVE-2022-50405

Vulnerability from fkie_nvd - Published: 2025-09-18 16:15 - Updated: 2026-08-04 10:18

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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/tunnel: wait until all sk_user_data reader finish before releasing the sock There is a race condition in vxlan that when deleting a vxlan device during receiving packets, there is a possibility that the sock is released after getting vxlan_sock vs from sk_user_data. Then in later vxlan_ecn_decapsulate(), vxlan_get_sk_family() we will got NULL pointer dereference. e.g. #0 [ffffa25ec6978a38] machine_kexec at ffffffff8c669757 #1 [ffffa25ec6978a90] __crash_kexec at ffffffff8c7c0a4d #2 [ffffa25ec6978b58] crash_kexec at ffffffff8c7c1c48 #3 [ffffa25ec6978b60] oops_end at ffffffff8c627f2b #4 [ffffa25ec6978b80] page_fault_oops at ffffffff8c678fcb #5 [ffffa25ec6978bd8] exc_page_fault at ffffffff8d109542 #6 [ffffa25ec6978c00] asm_exc_page_fault at ffffffff8d200b62 [exception RIP: vxlan_ecn_decapsulate+0x3b] RIP: ffffffffc1014e7b RSP: ffffa25ec6978cb0 RFLAGS: 00010246 RAX: 0000000000000008 RBX: ffff8aa000888000 RCX: 0000000000000000 RDX: 000000000000000e RSI: ffff8a9fc7ab803e RDI: ffff8a9fd1168700 RBP: ffff8a9fc7ab803e R8: 0000000000700000 R9: 00000000000010ae R10: ffff8a9fcb748980 R11: 0000000000000000 R12: ffff8a9fd1168700 R13: ffff8aa000888000 R14: 00000000002a0000 R15: 00000000000010ae ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #7 [ffffa25ec6978ce8] vxlan_rcv at ffffffffc10189cd [vxlan] #8 [ffffa25ec6978d90] udp_queue_rcv_one_skb at ffffffff8cfb6507 #9 [ffffa25ec6978dc0] udp_unicast_rcv_skb at ffffffff8cfb6e45 #10 [ffffa25ec6978dc8] __udp4_lib_rcv at ffffffff8cfb8807 #11 [ffffa25ec6978e20] ip_protocol_deliver_rcu at ffffffff8cf76951 #12 [ffffa25ec6978e48] ip_local_deliver at ffffffff8cf76bde #13 [ffffa25ec6978ea0] __netif_receive_skb_one_core at ffffffff8cecde9b #14 [ffffa25ec6978ec8] process_backlog at ffffffff8cece139 #15 [ffffa25ec6978f00] __napi_poll at ffffffff8ceced1a #16 [ffffa25ec6978f28] net_rx_action at ffffffff8cecf1f3 #17 [ffffa25ec6978fa0] __softirqentry_text_start at ffffffff8d4000ca #18 [ffffa25ec6978ff0] do_softirq at ffffffff8c6fbdc3 Reproducer: https://github.com/Mellanox/ovs-tests/blob/master/test-ovs-vxlan-remove-tunnel-during-traffic.sh Fix this by waiting for all sk_user_data reader to finish before releasing the sock.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/303000c793f705d07b551eb7c1c27001c5b33c8d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3cf7203ca620682165706f70a1b12b5194607dce	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/588d0b8462f5ffed3e677e65639825b2678117ab	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/84e566d157cc22ad2da8bdd970495855fbf13d92	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/91f09a776ae335ca836ed864b8f2a9461882a280	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9a6544343bba7da929d6d4a2dc44ec0f15970081	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b38aa7465411795e9e744b8d94633910497fec2a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/be34e79e0ae6adbf6e7e75ddaee9ad84795ab933	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e8316584b0a6c61c9c407631040c22712b26e38c	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	*
linux	linux_kernel	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
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          "product": "Linux",
          "programFiles": [
            "net/ipv4/udp_tunnel_core.c"
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "3.18"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "4.9.337",
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            },
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              "status": "unaffected",
              "version": "4.14.303",
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            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.229",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.163",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.15.86",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.0.16",
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              "lessThanOrEqual": "6.1.*",
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              "version": "6.1.2",
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              "lessThanOrEqual": "*",
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              "versionType": "original_commit_for_fix"
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          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/tunnel: wait until all sk_user_data reader finish before releasing the sock\n\nThere is a race condition in vxlan that when deleting a vxlan device\nduring receiving packets, there is a possibility that the sock is\nreleased after getting vxlan_sock vs from sk_user_data. Then in\nlater vxlan_ecn_decapsulate(), vxlan_get_sk_family() we will got\nNULL pointer dereference. e.g.\n\n   #0 [ffffa25ec6978a38] machine_kexec at ffffffff8c669757\n   #1 [ffffa25ec6978a90] __crash_kexec at ffffffff8c7c0a4d\n   #2 [ffffa25ec6978b58] crash_kexec at ffffffff8c7c1c48\n   #3 [ffffa25ec6978b60] oops_end at ffffffff8c627f2b\n   #4 [ffffa25ec6978b80] page_fault_oops at ffffffff8c678fcb\n   #5 [ffffa25ec6978bd8] exc_page_fault at ffffffff8d109542\n   #6 [ffffa25ec6978c00] asm_exc_page_fault at ffffffff8d200b62\n      [exception RIP: vxlan_ecn_decapsulate+0x3b]\n      RIP: ffffffffc1014e7b  RSP: ffffa25ec6978cb0  RFLAGS: 00010246\n      RAX: 0000000000000008  RBX: ffff8aa000888000  RCX: 0000000000000000\n      RDX: 000000000000000e  RSI: ffff8a9fc7ab803e  RDI: ffff8a9fd1168700\n      RBP: ffff8a9fc7ab803e   R8: 0000000000700000   R9: 00000000000010ae\n      R10: ffff8a9fcb748980  R11: 0000000000000000  R12: ffff8a9fd1168700\n      R13: ffff8aa000888000  R14: 00000000002a0000  R15: 00000000000010ae\n      ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018\n   #7 [ffffa25ec6978ce8] vxlan_rcv at ffffffffc10189cd [vxlan]\n   #8 [ffffa25ec6978d90] udp_queue_rcv_one_skb at ffffffff8cfb6507\n   #9 [ffffa25ec6978dc0] udp_unicast_rcv_skb at ffffffff8cfb6e45\n  #10 [ffffa25ec6978dc8] __udp4_lib_rcv at ffffffff8cfb8807\n  #11 [ffffa25ec6978e20] ip_protocol_deliver_rcu at ffffffff8cf76951\n  #12 [ffffa25ec6978e48] ip_local_deliver at ffffffff8cf76bde\n  #13 [ffffa25ec6978ea0] __netif_receive_skb_one_core at ffffffff8cecde9b\n  #14 [ffffa25ec6978ec8] process_backlog at ffffffff8cece139\n  #15 [ffffa25ec6978f00] __napi_poll at ffffffff8ceced1a\n  #16 [ffffa25ec6978f28] net_rx_action at ffffffff8cecf1f3\n  #17 [ffffa25ec6978fa0] __softirqentry_text_start at ffffffff8d4000ca\n  #18 [ffffa25ec6978ff0] do_softirq at ffffffff8c6fbdc3\n\nReproducer: https://github.com/Mellanox/ovs-tests/blob/master/test-ovs-vxlan-remove-tunnel-during-traffic.sh\n\nFix this by waiting for all sk_user_data reader to finish before\nreleasing the sock."
    }
  ],
  "id": "CVE-2022-50405",
  "lastModified": "2026-08-04T10:18:14.967",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "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"
      },
      {
        "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-50405",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-01-14T19:07:29.951048Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-09-18T16:15:43.630",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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    },
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    },
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    },
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      "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",
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    },
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "url": "https://git.kernel.org/stable/c/be34e79e0ae6adbf6e7e75ddaee9ad84795ab933"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/e8316584b0a6c61c9c407631040c22712b26e38c"
    }
  ],
  "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-2022-50405 (GCVE-0-2022-50405)

Vulnerability from cvelistv5 – Published: 2025-09-18 16:03 – Updated: 2026-08-05 08:58

Title

net/tunnel: wait until all sk_user_data reader finish before releasing the sock

Summary

Severity

7.8 (High)


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

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/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 2026-01-14 19:07 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6637 records in the last 180 days details

References

9 references

URL	Tags
https://git.kernel.org/stable/c/e8316584b0a6c61c9…
https://git.kernel.org/stable/c/84e566d157cc22ad2…
https://git.kernel.org/stable/c/be34e79e0ae6adbf6…
https://git.kernel.org/stable/c/303000c793f705d07…
https://git.kernel.org/stable/c/91f09a776ae335ca8…
https://git.kernel.org/stable/c/9a6544343bba7da92…
https://git.kernel.org/stable/c/b38aa7465411795e9…
https://git.kernel.org/stable/c/588d0b8462f5ffed3…
https://git.kernel.org/stable/c/3cf7203ca62068216…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d , < e8316584b0a6c61c9c407631040c22712b26e38c (git) Affected: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d , < 84e566d157cc22ad2da8bdd970495855fbf13d92 (git) Affected: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d , < be34e79e0ae6adbf6e7e75ddaee9ad84795ab933 (git) Affected: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d , < 303000c793f705d07b551eb7c1c27001c5b33c8d (git) Affected: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d , < 91f09a776ae335ca836ed864b8f2a9461882a280 (git) Affected: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d , < 9a6544343bba7da929d6d4a2dc44ec0f15970081 (git) Affected: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d , < b38aa7465411795e9e744b8d94633910497fec2a (git) Affected: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d , < 588d0b8462f5ffed3e677e65639825b2678117ab (git) Affected: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d , < 3cf7203ca620682165706f70a1b12b5194607dce (git)
Linux	Linux	Affected: 3.18 Unaffected: 0 , < 3.18 (semver) Unaffected: 4.9.337 , ≤ 4.9.* (semver) Unaffected: 4.14.303 , ≤ 4.14.* (semver) Unaffected: 4.19.270 , ≤ 4.19.* (semver) Unaffected: 5.4.229 , ≤ 5.4.* (semver) Unaffected: 5.10.163 , ≤ 5.10.* (semver) Unaffected: 5.15.86 , ≤ 5.15.* (semver) Unaffected: 6.0.16 , ≤ 6.0.* (semver) Unaffected: 6.1.2 , ≤ 6.1.* (semver) Unaffected: 6.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-50405",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T19:07:29.951048Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-476",
                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:13:08.244Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/udp_tunnel_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e8316584b0a6c61c9c407631040c22712b26e38c",
              "status": "affected",
              "version": "6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d",
              "versionType": "git"
            },
            {
              "lessThan": "84e566d157cc22ad2da8bdd970495855fbf13d92",
              "status": "affected",
              "version": "6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d",
              "versionType": "git"
            },
            {
              "lessThan": "be34e79e0ae6adbf6e7e75ddaee9ad84795ab933",
              "status": "affected",
              "version": "6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d",
              "versionType": "git"
            },
            {
              "lessThan": "303000c793f705d07b551eb7c1c27001c5b33c8d",
              "status": "affected",
              "version": "6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d",
              "versionType": "git"
            },
            {
              "lessThan": "91f09a776ae335ca836ed864b8f2a9461882a280",
              "status": "affected",
              "version": "6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d",
              "versionType": "git"
            },
            {
              "lessThan": "9a6544343bba7da929d6d4a2dc44ec0f15970081",
              "status": "affected",
              "version": "6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d",
              "versionType": "git"
            },
            {
              "lessThan": "b38aa7465411795e9e744b8d94633910497fec2a",
              "status": "affected",
              "version": "6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d",
              "versionType": "git"
            },
            {
              "lessThan": "588d0b8462f5ffed3e677e65639825b2678117ab",
              "status": "affected",
              "version": "6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d",
              "versionType": "git"
            },
            {
              "lessThan": "3cf7203ca620682165706f70a1b12b5194607dce",
              "status": "affected",
              "version": "6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/udp_tunnel_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.18"
            },
            {
              "lessThan": "3.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.337",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.303",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.229",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.163",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.337",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.303",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.270",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.229",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.163",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.86",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.16",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.2",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/tunnel: wait until all sk_user_data reader finish before releasing the sock\n\nThere is a race condition in vxlan that when deleting a vxlan device\nduring receiving packets, there is a possibility that the sock is\nreleased after getting vxlan_sock vs from sk_user_data. Then in\nlater vxlan_ecn_decapsulate(), vxlan_get_sk_family() we will got\nNULL pointer dereference. e.g.\n\n   #0 [ffffa25ec6978a38] machine_kexec at ffffffff8c669757\n   #1 [ffffa25ec6978a90] __crash_kexec at ffffffff8c7c0a4d\n   #2 [ffffa25ec6978b58] crash_kexec at ffffffff8c7c1c48\n   #3 [ffffa25ec6978b60] oops_end at ffffffff8c627f2b\n   #4 [ffffa25ec6978b80] page_fault_oops at ffffffff8c678fcb\n   #5 [ffffa25ec6978bd8] exc_page_fault at ffffffff8d109542\n   #6 [ffffa25ec6978c00] asm_exc_page_fault at ffffffff8d200b62\n      [exception RIP: vxlan_ecn_decapsulate+0x3b]\n      RIP: ffffffffc1014e7b  RSP: ffffa25ec6978cb0  RFLAGS: 00010246\n      RAX: 0000000000000008  RBX: ffff8aa000888000  RCX: 0000000000000000\n      RDX: 000000000000000e  RSI: ffff8a9fc7ab803e  RDI: ffff8a9fd1168700\n      RBP: ffff8a9fc7ab803e   R8: 0000000000700000   R9: 00000000000010ae\n      R10: ffff8a9fcb748980  R11: 0000000000000000  R12: ffff8a9fd1168700\n      R13: ffff8aa000888000  R14: 00000000002a0000  R15: 00000000000010ae\n      ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018\n   #7 [ffffa25ec6978ce8] vxlan_rcv at ffffffffc10189cd [vxlan]\n   #8 [ffffa25ec6978d90] udp_queue_rcv_one_skb at ffffffff8cfb6507\n   #9 [ffffa25ec6978dc0] udp_unicast_rcv_skb at ffffffff8cfb6e45\n  #10 [ffffa25ec6978dc8] __udp4_lib_rcv at ffffffff8cfb8807\n  #11 [ffffa25ec6978e20] ip_protocol_deliver_rcu at ffffffff8cf76951\n  #12 [ffffa25ec6978e48] ip_local_deliver at ffffffff8cf76bde\n  #13 [ffffa25ec6978ea0] __netif_receive_skb_one_core at ffffffff8cecde9b\n  #14 [ffffa25ec6978ec8] process_backlog at ffffffff8cece139\n  #15 [ffffa25ec6978f00] __napi_poll at ffffffff8ceced1a\n  #16 [ffffa25ec6978f28] net_rx_action at ffffffff8cecf1f3\n  #17 [ffffa25ec6978fa0] __softirqentry_text_start at ffffffff8d4000ca\n  #18 [ffffa25ec6978ff0] do_softirq at ffffffff8c6fbdc3\n\nReproducer: https://github.com/Mellanox/ovs-tests/blob/master/test-ovs-vxlan-remove-tunnel-during-traffic.sh\n\nFix this by waiting for all sk_user_data reader to finish before\nreleasing the sock."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Exploitation requires creating and deleting a UDP tunnel device (VXLAN/Geneve/etc.) via RTNL while racing packet receive; a remote peer alone cannot trigger sock release. An unprivileged local attacker in a user+net namespace can orchestrate both sides.\nAC:L - The attacker controls both sides of the race\u2014deleting/stopping the tunnel device while flooding packets to its UDP encap socket\u2014so success does not depend on conditions outside their influence.\nPR:L - Tunnel create/delete needs CAP_NET_ADMIN checked in the network namespace\u2019s user_ns (rtnetlink), which an unprivileged user obtains via user namespaces (unshare -Urn), not real init-ns root.\nUI:N - No victim interaction is required; the attacker locally creates traffic and tears down the tunnel device themselves.\nS:U - Impact is confined to the local kernel/host privilege boundary; this is a standard kernel UAF/privilege-escalation issue, not a VM/IOMMU/sandbox escape.\nC:H - Missing synchronize_rcu() before sock_release allows vxlan_rcv to keep using sk_user_data after the socket is released and the vxlan_sock is kfree\u2019d, a UAF that can yield arbitrary kernel read primitives.\nI:H - The same UAF of vxlan_sock/socket objects during concurrent encap receive enables heap reuse and write/control-flow hijacking primitives beyond a mere crash.\nA:H - The race causes a kernel NULL deref/oops in vxlan_ecn_decapsulate/vxlan_get_sk_family (and UAF crashes more generally), fully disrupting availability."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:58:36.034Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e8316584b0a6c61c9c407631040c22712b26e38c"
        },
        {
          "url": "https://git.kernel.org/stable/c/84e566d157cc22ad2da8bdd970495855fbf13d92"
        },
        {
          "url": "https://git.kernel.org/stable/c/be34e79e0ae6adbf6e7e75ddaee9ad84795ab933"
        },
        {
          "url": "https://git.kernel.org/stable/c/303000c793f705d07b551eb7c1c27001c5b33c8d"
        },
        {
          "url": "https://git.kernel.org/stable/c/91f09a776ae335ca836ed864b8f2a9461882a280"
        },
        {
          "url": "https://git.kernel.org/stable/c/9a6544343bba7da929d6d4a2dc44ec0f15970081"
        },
        {
          "url": "https://git.kernel.org/stable/c/b38aa7465411795e9e744b8d94633910497fec2a"
        },
        {
          "url": "https://git.kernel.org/stable/c/588d0b8462f5ffed3e677e65639825b2678117ab"
        },
        {
          "url": "https://git.kernel.org/stable/c/3cf7203ca620682165706f70a1b12b5194607dce"
        }
      ],
      "title": "net/tunnel: wait until all sk_user_data reader finish before releasing the sock",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50405",
    "datePublished": "2025-09-18T16:03:50.362Z",
    "dateReserved": "2025-09-17T14:53:07.001Z",
    "dateUpdated": "2026-08-05T08:58:36.034Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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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