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Vulnerability record · CVE-2026-23216 · published 18 February 2026

CVE-2026-23216: Linux kernel use after free vulnerability

Linux · Linux Kernel

In 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().

7.8 CVSS 3.1 High EPSS 0.12% · top 98.3% CWE-416 · Use after free
7.8CVSS 3.1 base score
0.12%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References
17 Jun 2026Last modified by NVD

Description

In 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().

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/275016a551ba1a068a3bd6171b18611726b67110 Patch
https://git.kernel.org/stable/c/3835e49e146a4e6e7787b29465f1a23379b6ec44 Patch
https://git.kernel.org/stable/c/48fe983e92de2c59d143fe38362ad17ba23ec7f3 Patch
https://git.kernel.org/stable/c/73b487d44bf4f92942629d578381f89c326ff77f Patch
https://git.kernel.org/stable/c/8518f072fc92921418cd9ed4268dd4f3e9a8fd75 Patch
https://git.kernel.org/stable/c/9411a89e9e7135cc459178fa77a3f1d6191ae903 Patch
https://git.kernel.org/stable/c/ba684191437380a07b27666eb4e72748be1ea201 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-23216), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.