CVE-2022-50405 (GCVE-0-2022-50405)
Vulnerability from cvelistv5
Published
2025-09-18 16:03
Modified
2025-09-18 16:03
Severity ?
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/303000c793f705d07b551eb7c1c27001c5b33c8d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3cf7203ca620682165706f70a1b12b5194607dce
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/588d0b8462f5ffed3e677e65639825b2678117ab
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/84e566d157cc22ad2da8bdd970495855fbf13d92
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/91f09a776ae335ca836ed864b8f2a9461882a280
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9a6544343bba7da929d6d4a2dc44ec0f15970081
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b38aa7465411795e9e744b8d94633910497fec2a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/be34e79e0ae6adbf6e7e75ddaee9ad84795ab933
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e8316584b0a6c61c9c407631040c22712b26e38c
Impacted products
Vendor Product Version
Linux Linux Version: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d
Version: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d
Version: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d
Version: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d
Version: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d
Version: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d
Version: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d
Version: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d
Version: 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d
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{
  "containers": {
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          "programFiles": [
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              "version": "6.0.16",
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              "version": "6.1.2",
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            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.337",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.303",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "4.19.270",
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                  "vulnerable": true
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                  "versionEndExcluding": "5.10.163",
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                {
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                  "versionEndExcluding": "5.15.86",
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                  "versionEndExcluding": "6.1.2",
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              "negate": false,
              "operator": "OR"
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      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-18T16:03:50.362Z",
        "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": "2025-09-18T16:03:50.362Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50405\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-18T16:15:43.630\",\"lastModified\":\"2025-09-19T16:00:27.847\",\"vulnStatus\":\"Awaiting Analysis\",\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/303000c793f705d07b551eb7c1c27001c5b33c8d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3cf7203ca620682165706f70a1b12b5194607dce\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/588d0b8462f5ffed3e677e65639825b2678117ab\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/84e566d157cc22ad2da8bdd970495855fbf13d92\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/91f09a776ae335ca836ed864b8f2a9461882a280\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9a6544343bba7da929d6d4a2dc44ec0f15970081\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b38aa7465411795e9e744b8d94633910497fec2a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/be34e79e0ae6adbf6e7e75ddaee9ad84795ab933\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e8316584b0a6c61c9c407631040c22712b26e38c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.