# CVE-2021-47427: linux: In the Linux kernel, the following vulnerability has been resolved:  scsi: iscsi: Fix iscsi_task use after free  Comm...

CVE-2021-47427 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47427, released May 21, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-47427
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0046
- 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 iscsi_task use after free  Commit d39df158518c ("scsi: iscsi: Have abort handler get ref to conn") added iscsi_get_conn()/iscsi_put_conn() calls during abort handling but then also changed the handling of the case where we detect an already completed task where we now end up doing a goto to the common put/cleanup code. This results in a iscsi_task use after free, because the common cleanup code will do a put on the iscsi_task.  This reverts the goto and moves the iscsi_get_conn() to after we've checked if the iscsi_task is valid.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.12-1 | [DEBIAN-CVE-2021-47427](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47427.md) | May 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.14.12-1 | [DEBIAN-CVE-2021-47427](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47427.md) | May 21, 2024 |
| Linux | linux Debian 14 | 5.14.12-1 | [DEBIAN-CVE-2021-47427](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47427.md) | May 21, 2024 |

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