CVE-2026-23193 (GCVE-0-2026-23193)
Vulnerability from cvelistv5
Published
2026-02-14 16:27
Modified
2026-05-11 22:02
Severity ?
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count() In iscsit_dec_session_usage_count(), the function calls complete() while holding the sess->session_usage_lock. Similar to the connection usage count logic, the waiter signaled by complete() (e.g., in the session release path) may wake up and free the iscsit_session structure immediately. This creates a race condition where the current thread may attempt to execute spin_unlock_bh() on a session structure that has already been deallocated, resulting in a KASAN slab-use-after-free. To resolve this, release the session_usage_lock before calling complete() to ensure all dereferences of the sess pointer are finished before the waiter is allowed to proceed with deallocation.
References
Impacted products
Vendor Product Version
Linux Linux Version: e48354ce078c079996f89d715dfa44814b4eba01
Version: e48354ce078c079996f89d715dfa44814b4eba01
Version: e48354ce078c079996f89d715dfa44814b4eba01
Version: e48354ce078c079996f89d715dfa44814b4eba01
Version: e48354ce078c079996f89d715dfa44814b4eba01
Version: e48354ce078c079996f89d715dfa44814b4eba01
Version: e48354ce078c079996f89d715dfa44814b4eba01
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{
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count()\n\nIn iscsit_dec_session_usage_count(), the function calls complete() while\nholding the sess-\u003esession_usage_lock. Similar to the connection usage count\nlogic, the waiter signaled by complete() (e.g., in the session release\npath) may wake up and free the iscsit_session structure immediately.\n\nThis creates a race condition where the current thread may attempt to\nexecute spin_unlock_bh() on a session structure that has already been\ndeallocated, resulting in a KASAN slab-use-after-free.\n\nTo resolve this, release the session_usage_lock before calling complete()\nto ensure all dereferences of the sess pointer are finished before the\nwaiter is allowed to proceed with deallocation."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:02:07.544Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2b64015550a13bcc72910be0565548d9a754d46d"
        },
        {
          "url": "https://git.kernel.org/stable/c/fd8b0900173307039d3a84644c2fee041a7ed4fb"
        },
        {
          "url": "https://git.kernel.org/stable/c/d8dbdc146e9e9a976931b78715be2e91299049f9"
        },
        {
          "url": "https://git.kernel.org/stable/c/11ebafffce31efc6abeb28c509017976fc49f1ca"
        },
        {
          "url": "https://git.kernel.org/stable/c/41b86a9ec037bd3435d68dd3692f0891a207e7e7"
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        },
        {
          "url": "https://git.kernel.org/stable/c/84dc6037390b8607c5551047d3970336cb51ba9a"
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      ],
      "title": "scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count()",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23193",
    "datePublished": "2026-02-14T16:27:20.251Z",
    "dateReserved": "2026-01-13T15:37:45.985Z",
    "dateUpdated": "2026-05-11T22:02:07.544Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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