# CVE-2022-49582: linux: In the Linux kernel, the following vulnerability has been resolved:  net: dsa: fix NULL pointer dereference in dsa_po...

CVE-2022-49582 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49582, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49582
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  net: dsa: fix NULL pointer dereference in dsa_port_reset_vlan_filtering  The "ds" iterator variable used in dsa_port_reset_vlan_filtering() -> dsa_switch_for_each_port() overwrites the "dp" received as argument, which is later used to call dsa_port_vlan_filtering() proper.  As a result, switches which do enter that code path (the ones with vlan_filtering_is_global=true) will dereference an invalid dp in dsa_port_reset_vlan_filtering() after leaving a VLAN-aware bridge.  Use a dedicated "other_dp" iterator variable to avoid this from happening.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.18.16-1 | [DEBIAN-CVE-2022-49582](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49582.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.18.16-1 | [DEBIAN-CVE-2022-49582](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49582.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.18.16-1 | [DEBIAN-CVE-2022-49582](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49582.md) | Feb 26, 2025 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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