CVE-2022-49582
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | d0004a020bb50263de0e3e775c7b7c7a003e0e0c < 3240e12fe203a3a79b9814e83327106b770ed7b0 | affected |
| Linux | Linux | d0004a020bb50263de0e3e775c7b7c7a003e0e0c < 1699b4d502eda3c7ea4070debad3ee570b5091b1 | affected |
| Linux | Linux | 5.16 | affected |
| Linux | Linux | 0 < 5.16 | unaffected |
| Linux | Linux | 5.18.15 <= 5.18.* | unaffected |
| Linux | Linux | 5.19 <= * | unaffected |
Weaknesses
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
- https://git.kernel.org/stable/c/3240e12fe203a3a79b9814e83327106b770ed7b0
- https://git.kernel.org/stable/c/1699b4d502eda3c7ea4070debad3ee570b5091b1
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