CVE-2026-23296: Linux kernel · scsi: core: Fix refcount leak for tagset_refcnt
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in ec5c17c687b189dbc09dfdec11b669caa40bc395 : update Linux kernel when convenient.
Data as of 5 Nov 2026, 22:04 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-05.
- Patch
- Available – fixed in ec5c17c687b189dbc09dfdec11b669caa40bc395, a03d96598d39fdf605d90731db3ef3b13fb8bdc8, 944a333c8e4d42256556c1d2ebb6d773a33e0dcd +7
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
Description
In the Linux kernel, the following vulnerability has been resolved: scsi: core: Fix refcount leak for tagset_refcnt This leak will cause a hang when tearing down the SCSI host. For example, iscsid hangs with the following call trace: [130120.652718] scsi_alloc_sdev: Allocation failure during SCSI scanning, some SCSI devices might not be configured PID: 2528 TASK: ffff9d0408974e00 CPU: 3 COMMAND: "iscsid" #0 [ffffb5b9c134b9e0] __schedule at ffffffff860657d4 #1 [ffffb5b9c134ba28] schedule at ffffffff86065c6f #2 [ffffb5b9c134ba40] schedule_timeout at ffffffff86069fb0 #3 [ffffb5b9c134bab0] __wait_for_common at ffffffff8606674f #4 [ffffb5b9c134bb10] scsi_remove_host at ffffffff85bfe84b #5 [ffffb5b9c134bb30] iscsi_sw_tcp_session_destroy at ffffffffc03031c4 [iscsi_tcp] #6 [ffffb5b9c134bb48] iscsi_if_recv_msg at ffffffffc0292692 [scsi_transport_iscsi] #7 [ffffb5b9c134bb98] iscsi_if_rx at ffffffffc02929c2 [scsi_transport_iscsi] #8 [ffffb5b9c134bbf0] netlink_unicast at ffffffff85e551d6 #9 [ffffb5b9c134bc38] netlink_sendmsg at ffffffff85e554ef
References
- git.kernel.org/stable/c/0e274674714427dc578bb99db5b86e312d2b57f8 (opens in a new tab)
- git.kernel.org/stable/c/9f5e4abed9248448aa1b45b12ab0bea4d329b56a (opens in a new tab)
- git.kernel.org/stable/c/7c01b680beaf4d3143866b062b8e770e8b237fb8 (opens in a new tab)
- git.kernel.org/stable/c/ec5c17c687b189dbc09dfdec11b669caa40bc395 (opens in a new tab)
- git.kernel.org/stable/c/944a333c8e4d42256556c1d2ebb6d773a33e0dcd (opens in a new tab)
- git.kernel.org/stable/c/a03d96598d39fdf605d90731db3ef3b13fb8bdc8 (opens in a new tab)
- git.kernel.org/stable/c/1ac22c8eae81366101597d48360718dff9b9d980 (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-784472.html (opens in a new tab)