CVE-2026-23193 Details
Description
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.
A use-after-free vulnerability has been identified in the Linux kernel's SCSI target iSCSI implementation, specifically within the session usage count management. The issue arises in the function 'iscsit_dec_session_usage_count()', where the function calls 'complete()' while holding a lock on the session usage. This can create a race condition, as the 'complete()' call may immediately free the 'iscsit_session' structure, leading to a situation where the current thread tries to unlock a session that has already been deallocated. This flaw causes a memory corruption issue, which can be exploited to execute arbitrary code or cause a denial-of-service condition.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for upgrading can be found in the official Linux kernel documentation.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 16, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/11ebafffce31efc6abeb28c509017976fc49f1ca | kernel.org | Patch |
| https://git.kernel.org/stable/c/2b64015550a13bcc72910be0565548d9a754d46d | kernel.org | Patch |
| https://git.kernel.org/stable/c/41b86a9ec037bd3435d68dd3692f0891a207e7e7 | kernel.org | Patch |
| https://git.kernel.org/stable/c/4530f4e4d0e6a207110b0ffed0c911bca43531a4 | kernel.org | Patch |
| https://git.kernel.org/stable/c/84dc6037390b8607c5551047d3970336cb51ba9a | kernel.org | Patch |
| https://git.kernel.org/stable/c/d8dbdc146e9e9a976931b78715be2e91299049f9 | kernel.org | Patch |
| https://git.kernel.org/stable/c/fd8b0900173307039d3a84644c2fee041a7ed4fb | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 3.1, < 5.10.250 >= 5.11, < 5.15.200 >= 5.16, < 6.1.163 >= 6.2, < 6.6.124 >= 6.7, < 6.12.70 >= 6.13, < 6.18.10 6.19 rc1 6.19 rc2 6.19 rc3 6.19 rc4 6.19 rc5 6.19 rc6 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 3, 2026 | CVE Modified | kernel.org |
| Mar 19, 2026 | Initial Analysis | [email protected] |
| Feb 14, 2026 | New CVE Received | kernel.org |