GHSA-FCCP-G2RW-8Q2G
Vulnerability from github – Published: 2026-02-14 18:30 – Updated: 2026-02-14 18:30In 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.
{
"affected": [],
"aliases": [
"CVE-2026-23193"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-14T17:15:57Z",
"severity": null
},
"details": "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.",
"id": "GHSA-fccp-g2rw-8q2g",
"modified": "2026-02-14T18:30:16Z",
"published": "2026-02-14T18:30:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23193"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/11ebafffce31efc6abeb28c509017976fc49f1ca"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2b64015550a13bcc72910be0565548d9a754d46d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/41b86a9ec037bd3435d68dd3692f0891a207e7e7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4530f4e4d0e6a207110b0ffed0c911bca43531a4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/84dc6037390b8607c5551047d3970336cb51ba9a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d8dbdc146e9e9a976931b78715be2e91299049f9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fd8b0900173307039d3a84644c2fee041a7ed4fb"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.