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CVE-2022-50459 (GCVE-0-2022-50459)

Vulnerability from cvelistv5 – Published: 2025-10-01 11:45 – Updated: 2026-08-05 08:58
VLAI
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: bcf3a2953d36bbfb9bd44ccb3db0897d935cc485 , < 884a788f065578bb640382279a83d1df433b13e6 (git)
Affected: bcf3a2953d36bbfb9bd44ccb3db0897d935cc485 , < a26b0658751bb0a3b28386fca715333b104d32a2 (git)
Affected: bcf3a2953d36bbfb9bd44ccb3db0897d935cc485 , < 897dbbc57d71e8a34ec1af8e573a142de457da38 (git)
Affected: bcf3a2953d36bbfb9bd44ccb3db0897d935cc485 , < 0a0b861fce2657ba08ec356a74346b37ca4b2008 (git)
Affected: bcf3a2953d36bbfb9bd44ccb3db0897d935cc485 , < 57569c37f0add1b6489e1a1563c71519daf732cf (git)
Affected: 7d29e950766327f658cb92722b9445ac3b3ae023 (git)
Affected: 5.8.14 , < 5.9 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 5.9
Unaffected: 0 , < 5.9 (semver)
Unaffected: 5.10.150 , ≤ 5.10.* (semver)
Unaffected: 5.15.75 , ≤ 5.15.* (semver)
Unaffected: 5.19.17 , ≤ 5.19.* (semver)
Unaffected: 6.0.3 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    "dateReserved": "2025-10-01T11:38:45.640Z",
    "dateUpdated": "2026-08-05T08:58:52.235Z",
    "state": "PUBLISHED"
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Originally, we just held the frwd_lock the entire time but in\\ncommit bcf3a2953d36 (\\\"scsi: iscsi: iscsi_tcp: Avoid holding spinlock while\\ncalling getpeername()\\\") we switched to refcount based because the network\\nlayer changed and started taking a mutex in that path, so we could no\\nlonger hold the frwd_lock.\\n\\nInstead of trying to maintain multiple refcounts, this just has us use a\\nmutex for accessing the socket in the interface code 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-13T19:32:34+00:00",
      "cve": "CVE-2022-50459",
      "id": "CVE-2022-50459",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "201",
      "product_status:known_affected": "112",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: scsi: iscsi: iscsi_tcp: Fix null-ptr-deref while calling getpeername()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50459.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-29T02:20:57Z",
      "cve": "CVE-2022-50459",
      "id": "CVE-2022-50459",
      "initial_release_date": "2025-10-01T23:32:20Z",
      "product_status:known_affected": "403",
      "product_status:known_not_affected": "235",
      "product_status:recommended": "323",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50459",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50459.json",
      "version": "40"
    }
  }
}



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  • 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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.