FKIE_CVE-2022-50350

Vulnerability from fkie_nvd - Published: 2025-09-16 17:15 - Updated: 2025-12-01 21:58
Severity ?
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: 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/1533b8b3058db618409f41554ebe768c2e3acfaePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3ecdca49ca49d4770639d81503c873b6d25887c4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fec1b2fa62c162d03f5dcd7b03e3c89d3116d49fPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
To clipboard 

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      "nodes": [
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "85836EA7-7E00-413E-838E-F4D67567E7F9",
              "versionEndExcluding": "6.0.16",
              "versionStartIncluding": "3.12",
              "vulnerable": true
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  "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()"
    }
  ],
  "id": "CVE-2022-50350",
  "lastModified": "2025-12-01T21:58:43.630",
  "metrics": {
    "cvssMetricV31": [
      {
        "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"
      }
    ]
  },
  "published": "2025-09-16T17:15:34.833",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/1533b8b3058db618409f41554ebe768c2e3acfae"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-362"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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