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scsi: iscsi: iscsi_tcp: Fix null-ptr-deref while calling getpeername()

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi: iscsi_tcp: Fix null-ptr-deref while calling getpeername() Fix a NULL pointer crash that occurs when we are freeing the socket at the same time we access it via sysfs. The problem is that: 1. iscsi_sw_tcp_conn_get_param() and iscsi_sw_tcp_host_get_param() take the frwd_lock and do sock_hold() then drop the frwd_lock. sock_hold() does a get on the "struct sock". 2. iscsi_sw_tcp_release_conn() does sockfd_put() which does the last put on the "struct socket" and that does __sock_release() which sets the sock->ops to NULL. 3. iscsi_sw_tcp_conn_get_param() and iscsi_sw_tcp_host_get_param() then call kernel_getpeername() which accesses the NULL sock->ops. Above we do a get on the "struct sock", but we needed a get on the "struct socket". Originally, we just held the frwd_lock the entire time but in commit bcf3a2953d36 ("scsi: iscsi: iscsi_tcp: Avoid holding spinlock while calling getpeername()") we switched to refcount based because the network layer changed and started taking a mutex in that path, so we could no longer hold the frwd_lock. Instead of trying to maintain multiple refcounts, this just has us use a mutex for accessing the socket in the interface code paths.

Products
Kernel
Affected versions
Not specified
Fixed versions
5.10.150, 5.15.75, 5.19.17, 6.0.3
CVEs
CVE-2022-50459
Confirmed fixed CVEs
Not specified
Updated in this feed
8 Nov 2026, 00:45 UTC · Revision 1

Source evidence

scsi: iscsi: iscsi_tcp: Fix null-ptr-deref while calling getpeername()

core-osv · Original source

Published 1 Oct 2025, 11:45 UTC

In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi: iscsi_tcp: Fix null-ptr-deref while calling getpeername() Fix a NULL pointer crash that occurs when we are freeing the socket at the same time we access it via sysfs. The problem is that: 1. iscsi_sw_tcp_conn_get_param() and iscsi_sw_tcp_host_get_param() take the frwd_lock and do sock_hold() then drop the frwd_lock. sock_hold() does a get on the "struct sock". 2. iscsi_sw_tcp_release_conn() does sockfd_put() which does the last put on the "struct socket" and that does __sock_release() which sets the sock->ops to NULL. 3. iscsi_sw_tcp_conn_get_param() and iscsi_sw_tcp_host_get_param() then call kernel_getpeername() which accesses the NULL sock->ops. Above we do a get on the "struct sock", but we needed a get on the "struct socket". Originally, we just held the frwd_lock the entire time but in commit bcf3a2953d36 ("scsi: iscsi: iscsi_tcp: Avoid holding spinlock while calling getpeername()") we switched to refcount based because the network layer changed and started taking a mutex in that path, so we could no longer hold the frwd_lock. Instead of trying to maintain multiple refcounts, this just has us use a mutex for accessing the socket in the interface code paths.

osv:CVE-2022-50459

Kernel

Fixed versions: 5.10.150, 5.15.75, 5.19.17, 6.0.3

Complete source record
{
  "id": "ef50151d9ef6ce29c249f31c0b77c790b22235c78416c47d6cf85b2607dfeba5",
  "url": "https://osv.dev/vulnerability/CVE-2022-50459",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "scsi: iscsi: iscsi_tcp: Fix null-ptr-deref while calling getpeername()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi: iscsi_tcp: Fix null-ptr-deref while calling getpeername() Fix a NULL pointer crash that occurs when we are freeing the socket at the same time we access it via sysfs. The problem is that: 1. iscsi_sw_tcp_conn_get_param() and iscsi_sw_tcp_host_get_param() take the frwd_lock and do sock_hold() then drop the frwd_lock. sock_hold() does a get on the \"struct sock\". 2. iscsi_sw_tcp_release_conn() does sockfd_put() which does the last put on the \"struct socket\" and that does __sock_release() which sets the sock->ops to NULL. 3. iscsi_sw_tcp_conn_get_param() and iscsi_sw_tcp_host_get_param() then call kernel_getpeername() which accesses the NULL sock->ops. Above we do a get on the \"struct sock\", but we needed a get on the \"struct socket\". Originally, we just held the frwd_lock the entire time but in commit bcf3a2953d36 (\"scsi: iscsi: iscsi_tcp: Avoid holding spinlock while calling getpeername()\") we switched to refcount based because the network layer changed and started taking a mutex in that path, so we could no longer hold the frwd_lock. Instead of trying to maintain multiple refcounts, this just has us use a mutex for accessing the socket in the interface code paths.",
    "evidence": "osv:CVE-2022-50459",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "5.10.150",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.75",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.19.17",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.0.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-50459",
      "aliases": [
        "CVE-2022-50459"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
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      "affected": [
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50459.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
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                  "introduced": "5.9.0"
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            },
            {
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      ],
      "modified": "2026-10-28T02:30:52.586984053Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0a0b861fce2657ba08ec356a74346b37ca4b2008",
        "https://git.kernel.org/stable/c/57569c37f0add1b6489e1a1563c71519daf732cf",
        "https://git.kernel.org/stable/c/884a788f065578bb640382279a83d1df433b13e6",
        "https://git.kernel.org/stable/c/897dbbc57d71e8a34ec1af8e573a142de457da38",
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        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50459.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50459",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50459.json"
      }
    },
    "related_cves": [
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521075,
  "published_at": "2025-10-01T11:45:31.74+00:00"
}