CVE-2022-49582

published 2025-02-26

CVE-2022-49582: 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…

Priority P4 20 medium 5.5 CVSS 3.1

AV L AC L PR L UI N S U C N I N A H

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.

Affected

9 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 5.18.16-1 (bookworm)	linux 5.18.16-1 (bookworm)
linux	linux	—	—
linux	linux	>= d0004a020bb50263de0e3e775c7b7c7a003e0e0c < 3240e12fe203a3a79b9814e83327106b770ed7b0	3240e12fe203a3a79b9814e83327106b770ed7b0
linux	linux	>= d0004a020bb50263de0e3e775c7b7c7a003e0e0c < 1699b4d502eda3c7ea4070debad3ee570b5091b1	1699b4d502eda3c7ea4070debad3ee570b5091b1
linux	linux_kernel	—	—
linux	linux_kernel	>= 0 < 5.18.16-1	5.18.16-1
linux	linux_kernel	>= 0 < 5.18.16-1	5.18.16-1
linux	linux_kernel	>= 0 < 5.18.16-1	5.18.16-1
linux	linux_kernel	>= 5.16 < 5.18.15	5.18.15

CVSS provenance

nvd v3.1 5.5 MEDIUM CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv 5.5 MEDIUM

vendor_debian 5.5 MEDIUM

vendor_redhat 5.5 MEDIUM

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