GHSA-JFQ5-QG8X-7RMP
Vulnerability from github – Published: 2026-02-18 15:31 – Updated: 2026-03-18 21:32In the Linux kernel, the following vulnerability has been resolved:
scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count()
In iscsit_dec_conn_usage_count(), the function calls complete() while holding the conn->conn_usage_lock. As soon as complete() is invoked, the waiter (such as iscsit_close_connection()) may wake up and proceed to free the iscsit_conn structure.
If the waiter frees the memory before the current thread reaches spin_unlock_bh(), it results in a KASAN slab-use-after-free as the function attempts to release a lock within the already-freed connection structure.
Fix this by releasing the spinlock before calling complete().
{
"affected": [],
"aliases": [
"CVE-2026-23216"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-18T15:18:42Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count()\n\nIn iscsit_dec_conn_usage_count(), the function calls complete() while\nholding the conn-\u003econn_usage_lock. As soon as complete() is invoked, the\nwaiter (such as iscsit_close_connection()) may wake up and proceed to free\nthe iscsit_conn structure.\n\nIf the waiter frees the memory before the current thread reaches\nspin_unlock_bh(), it results in a KASAN slab-use-after-free as the function\nattempts to release a lock within the already-freed connection structure.\n\nFix this by releasing the spinlock before calling complete().",
"id": "GHSA-jfq5-qg8x-7rmp",
"modified": "2026-03-18T21:32:57Z",
"published": "2026-02-18T15:31:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23216"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/275016a551ba1a068a3bd6171b18611726b67110"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3835e49e146a4e6e7787b29465f1a23379b6ec44"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/48fe983e92de2c59d143fe38362ad17ba23ec7f3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/73b487d44bf4f92942629d578381f89c326ff77f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8518f072fc92921418cd9ed4268dd4f3e9a8fd75"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9411a89e9e7135cc459178fa77a3f1d6191ae903"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ba684191437380a07b27666eb4e72748be1ea201"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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