ghsa-vh3w-x8qx-rvfm
Vulnerability from github
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()
{
"affected": [],
"aliases": [
"CVE-2022-50350"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-16T17:15:34Z",
"severity": null
},
"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": "2025-09-16T18:31:26Z",
"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": []
}
Sightings
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