# CVE-2021-47164: linux: In the Linux kernel, the following vulnerability has been resolved:  net/mlx5e: Fix null deref accessing lag dev  It...

CVE-2021-47164 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47164, released March 25, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-47164
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 25, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  net/mlx5e: Fix null deref accessing lag dev  It could be the lag dev is null so stop processing the event. In bond_enslave() the active/backup slave being set before setting the upper dev so first event is without an upper dev. After setting the upper dev with bond_master_upper_dev_link() there is a second event and in that event we have an upper dev.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.6-1 | [DEBIAN-CVE-2021-47164](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47164.md) | Mar 25, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.14.6-1 | [DEBIAN-CVE-2021-47164](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47164.md) | Mar 25, 2024 |
| Linux | linux Debian 14 | 5.14.6-1 | [DEBIAN-CVE-2021-47164](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47164.md) | Mar 25, 2024 |

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