CVE-2022-50350 (GCVE-0-2022-50350)
Vulnerability from cvelistv5
Published
2025-09-16 16:11
Modified
2025-09-16 16:11
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix a race condition between login_work and the login thread In case a malicious initiator sends some random data immediately after a login PDU; the iscsi_target_sk_data_ready() callback will schedule the login_work and, at the same time, the negotiation may end without clearing the LOGIN_FLAGS_INITIAL_PDU flag (because no additional PDU exchanges are required to complete the login). The login has been completed but the login_work function will find the LOGIN_FLAGS_INITIAL_PDU flag set and will never stop from rescheduling itself; at this point, if the initiator drops the connection, the iscsit_conn structure will be freed, login_work will dereference a released socket structure and the kernel crashes. BUG: kernel NULL pointer dereference, address: 0000000000000230 PF: supervisor write access in kernel mode PF: error_code(0x0002) - not-present page Workqueue: events iscsi_target_do_login_rx [iscsi_target_mod] RIP: 0010:_raw_read_lock_bh+0x15/0x30 Call trace: iscsi_target_do_login_rx+0x75/0x3f0 [iscsi_target_mod] process_one_work+0x1e8/0x3c0 Fix this bug by forcing login_work to stop after the login has been completed and the socket callbacks have been restored. Add a comment to clearify the return values of iscsi_target_do_login()
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1533b8b3058db618409f41554ebe768c2e3acfae
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3ecdca49ca49d4770639d81503c873b6d25887c4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fec1b2fa62c162d03f5dcd7b03e3c89d3116d49f
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/target/iscsi/iscsi_target_nego.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1533b8b3058db618409f41554ebe768c2e3acfae",
              "status": "affected",
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              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
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            {
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/target/iscsi/iscsi_target_nego.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "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": "6.0.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: iscsi: Fix a race condition between login_work and the login thread\n\nIn case a malicious initiator sends some random data immediately after a\nlogin PDU; the iscsi_target_sk_data_ready() callback will schedule the\nlogin_work and, at the same time, the negotiation may end without clearing\nthe LOGIN_FLAGS_INITIAL_PDU flag (because no additional PDU exchanges are\nrequired to complete the login).\n\nThe login has been completed but the login_work function will find the\nLOGIN_FLAGS_INITIAL_PDU flag set and will never stop from rescheduling\nitself; at this point, if the initiator drops the connection, the\niscsit_conn structure will be freed, login_work will dereference a released\nsocket structure and the kernel crashes.\n\nBUG: kernel NULL pointer dereference, address: 0000000000000230\nPF: supervisor write access in kernel mode\nPF: error_code(0x0002) - not-present page\nWorkqueue: events iscsi_target_do_login_rx [iscsi_target_mod]\nRIP: 0010:_raw_read_lock_bh+0x15/0x30\nCall trace:\n iscsi_target_do_login_rx+0x75/0x3f0 [iscsi_target_mod]\n process_one_work+0x1e8/0x3c0\n\nFix this bug by forcing login_work to stop after the login has been\ncompleted and the socket callbacks have been restored.\n\nAdd a comment to clearify the return values of iscsi_target_do_login()"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-16T16:11:42.029Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1533b8b3058db618409f41554ebe768c2e3acfae"
        },
        {
          "url": "https://git.kernel.org/stable/c/3ecdca49ca49d4770639d81503c873b6d25887c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/fec1b2fa62c162d03f5dcd7b03e3c89d3116d49f"
        }
      ],
      "title": "scsi: target: iscsi: Fix a race condition between login_work and the login thread",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50350",
    "datePublished": "2025-09-16T16:11:42.029Z",
    "dateReserved": "2025-09-16T16:03:27.882Z",
    "dateUpdated": "2025-09-16T16:11:42.029Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50350\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-16T17:15:34.833\",\"lastModified\":\"2025-09-17T14:18:55.093\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nscsi: target: iscsi: Fix a race condition between login_work and the login thread\\n\\nIn case a malicious initiator sends some random data immediately after a\\nlogin PDU; the iscsi_target_sk_data_ready() callback will schedule the\\nlogin_work and, at the same time, the negotiation may end without clearing\\nthe LOGIN_FLAGS_INITIAL_PDU flag (because no additional PDU exchanges are\\nrequired to complete the login).\\n\\nThe login has been completed but the login_work function will find the\\nLOGIN_FLAGS_INITIAL_PDU flag set and will never stop from rescheduling\\nitself; at this point, if the initiator drops the connection, the\\niscsit_conn structure will be freed, login_work will dereference a released\\nsocket structure and the kernel crashes.\\n\\nBUG: kernel NULL pointer dereference, address: 0000000000000230\\nPF: supervisor write access in kernel mode\\nPF: error_code(0x0002) - not-present page\\nWorkqueue: events iscsi_target_do_login_rx [iscsi_target_mod]\\nRIP: 0010:_raw_read_lock_bh+0x15/0x30\\nCall trace:\\n iscsi_target_do_login_rx+0x75/0x3f0 [iscsi_target_mod]\\n process_one_work+0x1e8/0x3c0\\n\\nFix this bug by forcing login_work to stop after the login has been\\ncompleted and the socket callbacks have been restored.\\n\\nAdd a comment to clearify the return values of iscsi_target_do_login()\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1533b8b3058db618409f41554ebe768c2e3acfae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3ecdca49ca49d4770639d81503c873b6d25887c4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fec1b2fa62c162d03f5dcd7b03e3c89d3116d49f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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