CVE-2022-48779: net: mscc: ocelot: fix use-after-free in ocelot_vlan_del()

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-16 · updated 2026-08-04
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: net: mscc: ocelot: fix use-after-free in ocelot_vlan_del() ocelot_vlan_member_del() will free the struct ocelot_bridge_vlan, so if this is the same as the port's pvid_vlan which we access afterwards, what we're accessing is freed memory. Fix the bug by determining whether to clear ocelot_port->pvid_vlan prior to calling ocelot_vlan_member_del().

Affected products

Linux kernel: from 5.16 before 5.16.11 — fixed in 5.16.11

How to fix

Upgrade to a fixed version: Linux kernel 5.16.11. Check the vendor advisory for mitigations.

References

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