# CVE-2021-47198: linux: In the Linux kernel, the following vulnerability has been resolved:  scsi: lpfc: Fix use-after-free in lpfc_unreg_rpi...

CVE-2021-47198 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47198, released April 10, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-47198
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 10, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  scsi: lpfc: Fix use-after-free in lpfc_unreg_rpi() routine  An error is detected with the following report when unloading the driver:   "KASAN: use-after-free in lpfc_unreg_rpi+0x1b1b"  The NLP_REG_LOGIN_SEND nlp_flag is set in lpfc_reg_fab_ctrl_node(), but the flag is not cleared upon completion of the login.  This allows a second call to lpfc_unreg_rpi() to proceed with nlp_rpi set to LPFC_RPI_ALLOW_ERROR.  This results in a use after free access when used as an rpi_ids array index.  Fix by clearing the NLP_REG_LOGIN_SEND nlp_flag in lpfc_mbx_cmpl_fc_reg_login().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.15.5-1 | [DEBIAN-CVE-2021-47198](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47198.md) | Apr 10, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.15.5-1 | [DEBIAN-CVE-2021-47198](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47198.md) | Apr 10, 2024 |
| Linux | linux Debian 14 | 5.15.5-1 | [DEBIAN-CVE-2021-47198](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47198.md) | Apr 10, 2024 |

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