# CVE-2021-47328: linux: In the Linux kernel, the following vulnerability has been resolved:  scsi: iscsi: Fix conn use after free during rese...

CVE-2021-47328 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47328, released May 21, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-47328
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0077
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 21, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  scsi: iscsi: Fix conn use after free during resets  If we haven't done a unbind target call we can race where iscsi_conn_teardown wakes up the EH thread and then frees the conn while those threads are still accessing the conn ehwait.  We can only do one TMF per session so this just moves the TMF fields from the conn to the session. We can then rely on the iscsi_session_teardown->iscsi_remove_session->__iscsi_unbind_session call to remove the target and it's devices, and know after that point there is no device or scsi-ml callout trying to access the session.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.6-1 | [DEBIAN-CVE-2021-47328](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47328.md) | May 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.14.6-1 | [DEBIAN-CVE-2021-47328](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47328.md) | May 21, 2024 |
| Linux | linux Debian 14 | 5.14.6-1 | [DEBIAN-CVE-2021-47328](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47328.md) | May 21, 2024 |

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