Bug 2440630 (CVE-2026-23216) - CVE-2026-23216 kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count()
Summary: CVE-2026-23216 kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_...
Keywords:
Status: NEW
Alias: CVE-2026-23216
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-02-18 15:02 UTC by OSIDB Bzimport
Modified: 2026-06-12 19:51 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:10756 0 None None None 2026-04-27 10:31:49 UTC
Red Hat Product Errata RHSA-2026:22964 0 None None None 2026-06-04 15:45:46 UTC
Red Hat Product Errata RHSA-2026:23237 0 None None None 2026-06-04 10:22:39 UTC
Red Hat Product Errata RHSA-2026:25217 0 None None None 2026-06-11 10:13:27 UTC
Red Hat Product Errata RHSA-2026:25218 0 None None None 2026-06-11 10:53:53 UTC
Red Hat Product Errata RHSA-2026:25533 0 None None None 2026-06-12 19:51:43 UTC
Red Hat Product Errata RHSA-2026:9870 0 None None None 2026-04-22 20:40:52 UTC

Description OSIDB Bzimport 2026-02-18 15:02:39 UTC 
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().
Comment 1 Alexander B 2026-02-18 17:27:55 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026021800-CVE-2026-23216-6c63@gregkh/T
Comment 6 errata-xmlrpc 2026-04-22 20:40:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:9870 https://access.redhat.com/errata/RHSA-2026:9870
Comment 7 errata-xmlrpc 2026-04-27 10:31:48 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:10756 https://access.redhat.com/errata/RHSA-2026:10756
Comment 8 errata-xmlrpc 2026-06-04 10:22:38 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:23237 https://access.redhat.com/errata/RHSA-2026:23237
Comment 9 errata-xmlrpc 2026-06-04 15:45:45 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:22964 https://access.redhat.com/errata/RHSA-2026:22964
Comment 10 errata-xmlrpc 2026-06-11 10:13:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:25217 https://access.redhat.com/errata/RHSA-2026:25217
Comment 11 errata-xmlrpc 2026-06-11 10:53:52 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:25218 https://access.redhat.com/errata/RHSA-2026:25218
Comment 12 errata-xmlrpc 2026-06-12 19:51:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

Via RHSA-2026:25533 https://access.redhat.com/errata/RHSA-2026:25533
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