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CVE-2022-50405 (GCVE-0-2022-50405)

Vulnerability from cvelistv5 – Published: 2025-09-18 16:03 – Updated: 2026-08-05 08:58
VLAI
Title
net/tunnel: wait until all sk_user_data reader finish before releasing the sock
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.
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
References
Impacted products
Vendor Product Version CPE status
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)
guessed Create a notification for this product.
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)
guessed Create a notification for this product.
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          "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."
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            "baseSeverity": "HIGH",
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            "version": "3.1"
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              "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."
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        "dateUpdated": "2026-08-05T08:58:36.034Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/e8316584b0a6c61c9c407631040c22712b26e38c"
        },
        {
          "url": "https://git.kernel.org/stable/c/84e566d157cc22ad2da8bdd970495855fbf13d92"
        },
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          "url": "https://git.kernel.org/stable/c/be34e79e0ae6adbf6e7e75ddaee9ad84795ab933"
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        {
          "url": "https://git.kernel.org/stable/c/303000c793f705d07b551eb7c1c27001c5b33c8d"
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    "dateReserved": "2025-09-17T14:53:07.001Z",
    "dateUpdated": "2026-08-05T08:58:36.034Z",
    "state": "PUBLISHED"
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    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50405\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-18T16:15:43.630\",\"lastModified\":\"2026-08-04T10:18:14.967\",\"vulnStatus\":\"Modified\",\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/ipv4/udp_tunnel_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\",\"lessThan\":\"e8316584b0a6c61c9c407631040c22712b26e38c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\",\"lessThan\":\"84e566d157cc22ad2da8bdd970495855fbf13d92\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\",\"lessThan\":\"be34e79e0ae6adbf6e7e75ddaee9ad84795ab933\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\",\"lessThan\":\"303000c793f705d07b551eb7c1c27001c5b33c8d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\",\"lessThan\":\"91f09a776ae335ca836ed864b8f2a9461882a280\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\",\"lessThan\":\"9a6544343bba7da929d6d4a2dc44ec0f15970081\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\",\"lessThan\":\"b38aa7465411795e9e744b8d94633910497fec2a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\",\"lessThan\":\"588d0b8462f5ffed3e677e65639825b2678117ab\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\",\"lessThan\":\"3cf7203ca620682165706f70a1b12b5194607dce\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/ipv4/udp_tunnel_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.18\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.18\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.9.337\",\"lessThanOrEqual\":\"4.9.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.14.303\",\"lessThanOrEqual\":\"4.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.270\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.229\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.163\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.86\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.0.16\",\"lessThanOrEqual\":\"6.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.2\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-01-14T19:07:29.951048Z\",\"id\":\"CVE-2022-50405\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-05T11:47:20+00:00",
      "cve": "CVE-2022-50405",
      "id": "CVE-2022-50405",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "321",
      "product_status:known_affected": "38",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net/tunnel: wait until all sk_user_data reader finish before releasing the sock",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50405.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-16T00:26:44Z",
      "cve": "CVE-2022-50405",
      "id": "CVE-2022-50405",
      "initial_release_date": "2025-09-18T23:43:05Z",
      "product_status:known_affected": "718",
      "product_status:known_not_affected": "176",
      "product_status:recommended": "84",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50405",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50405.json",
      "version": "40"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-50405\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T19:07:29.951048Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-476\", \"description\": \"CWE-476 NULL Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T19:07:25.141Z\"}}], \"cna\": {\"title\": \"net/tunnel: wait until all sk_user_data reader finish before releasing the sock\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\", \"lessThan\": \"e8316584b0a6c61c9c407631040c22712b26e38c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\", \"lessThan\": \"84e566d157cc22ad2da8bdd970495855fbf13d92\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\", \"lessThan\": \"be34e79e0ae6adbf6e7e75ddaee9ad84795ab933\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\", \"lessThan\": \"303000c793f705d07b551eb7c1c27001c5b33c8d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\", \"lessThan\": \"91f09a776ae335ca836ed864b8f2a9461882a280\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\", \"lessThan\": \"9a6544343bba7da929d6d4a2dc44ec0f15970081\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\", \"lessThan\": \"b38aa7465411795e9e744b8d94633910497fec2a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\", \"lessThan\": \"588d0b8462f5ffed3e677e65639825b2678117ab\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d\", \"lessThan\": \"3cf7203ca620682165706f70a1b12b5194607dce\", \"versionType\": \"git\"}], \"programFiles\": [\"net/ipv4/udp_tunnel_core.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.18\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.18\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.9.337\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.303\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.270\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.229\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.163\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.86\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.0.16\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.0.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.2\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/ipv4/udp_tunnel_core.c\"], \"defaultStatus\": \"affected\"}], \"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\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.337\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.303\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.270\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.229\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.163\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.86\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.0.16\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.2\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.2\", \"versionStartIncluding\": \"3.18\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:18:51.602Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-50405\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:18:51.602Z\", \"dateReserved\": \"2025-09-17T14:53:07.001Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-18T16:03:50.362Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.