CVE-2026-23193 (GCVE-0-2026-23193)

Vulnerability from cvelistv5 – Published: 2026-02-14 16:27 – Updated: 2026-02-14 16:27
VLAI?
Title
scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count()
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2b64015550a13bcc72910be0565548d9a754d46d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < fd8b0900173307039d3a84644c2fee041a7ed4fb (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d8dbdc146e9e9a976931b78715be2e91299049f9 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 11ebafffce31efc6abeb28c509017976fc49f1ca (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 41b86a9ec037bd3435d68dd3692f0891a207e7e7 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4530f4e4d0e6a207110b0ffed0c911bca43531a4 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 84dc6037390b8607c5551047d3970336cb51ba9a (git)
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    Linux Linux Unaffected: 5.10.250 , ≤ 5.10.* (semver)
Unaffected: 5.15.200 , ≤ 5.15.* (semver)
Unaffected: 6.1.163 , ≤ 6.1.* (semver)
Unaffected: 6.6.124 , ≤ 6.6.* (semver)
Unaffected: 6.12.70 , ≤ 6.12.* (semver)
Unaffected: 6.18.10 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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          "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-14T16:27:20.251Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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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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}


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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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