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GHSA-VH3W-X8QX-RVFM

Vulnerability from github – Published: 2025-09-16 18:31 – Updated: 2025-12-02 00:31

Details

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()

Severity

4.7 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50350"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-16T17:15:34Z",
    "severity": "MODERATE"
  },
  "details": "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": "GHSA-vh3w-x8qx-rvfm",
  "modified": "2025-12-02T00:31:10Z",
  "published": "2025-09-16T18:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50350"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1533b8b3058db618409f41554ebe768c2e3acfae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ecdca49ca49d4770639d81503c873b6d25887c4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fec1b2fa62c162d03f5dcd7b03e3c89d3116d49f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-50350 (GCVE-0-2022-50350)

Vulnerability from cvelistv5 – Published: 2025-09-16 16:11 – Updated: 2026-08-05 08:58

Title

scsi: target: iscsi: Fix a race condition between login_work and the login thread

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()

Severity

9.8 (Critical)


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

4.7 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/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 18:21 UTC

CWE

CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/1533b8b3058db6184…
https://git.kernel.org/stable/c/3ecdca49ca49d4770…
https://git.kernel.org/stable/c/fec1b2fa62c162d03…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d381a8010a052813a88e20e089be4a58aad8b40a , < 1533b8b3058db618409f41554ebe768c2e3acfae (git) Affected: d381a8010a052813a88e20e089be4a58aad8b40a , < 3ecdca49ca49d4770639d81503c873b6d25887c4 (git) Affected: d381a8010a052813a88e20e089be4a58aad8b40a , < fec1b2fa62c162d03f5dcd7b03e3c89d3116d49f (git)
Linux	Linux	Affected: 3.12 Unaffected: 0 , < 3.12 (semver) Unaffected: 6.0.16 , ≤ 6.0.* (semver) Unaffected: 6.1.2 , ≤ 6.1.* (semver) Unaffected: 6.2 , ≤ * (original_commit_for_fix)

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        "metrics": [
          {
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              "attackComplexity": "HIGH",
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              "confidentialityImpact": "NONE",
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              "userInteraction": "NONE",
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                "id": "CVE-2022-50350",
                "options": [
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                  }
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                "timestamp": "2026-01-14T18:21:59.970337Z",
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              "value": "AV:N - The bug is in the in-kernel iSCSI target (LIO) login path on a TCP network portal (typically port 3260); a remote initiator triggers it by sending login traffic and extra socket data over the network.\nAC:L - The attacker controls both sides of the race by completing login while injecting extra data to schedule login_work, then dropping the connection; no uninfluenceable victim state or lucky timing beyond attacker-driven traffic is required.\nPR:N - Discovery sessions disable authentication by default (AuthMethod allows None), so an unauthenticated remote initiator can complete login and hit the vulnerable success path without credentials.\nUI:N - Exploitation requires only attacker-initiated iSCSI TCP connections and crafted login/extra data; no victim user action is needed.\nS:U - Impact remains within the target kernel\u0027s authority (UAF/crash of the host kernel); this is not a VM escape, IOMMU bypass, or other cross-boundary scope change.\nC:H - The bug is a use-after-free of iscsit_conn (and associated socket state) while login_work still runs on the freed object, which can be reclaimed/sprayed to obtain arbitrary read primitives.\nI:H - The same workqueue UAF on a freed iscsit_conn enables heap reuse and control of subsequent sock/login pointer use, providing a path to arbitrary write and control-flow hijacking.\nA:H - The demonstrated result is a kernel NULL pointer dereference/oops in iscsi_target_do_login_rx, and UAFs reliably cause kernel crashes even when not fully exploited."
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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.

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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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GHSA-VH3W-X8QX-RVFM

CVE-2022-50350 (GCVE-0-2022-50350)

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