CVE-2022-48779

Summary

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 Software

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

• https://git.kernel.org/stable/c/c98bed60cdd7f22237ae256cc9c1c3087206b8a2
• https://git.kernel.org/stable/c/ef57640575406f57f5b3393cf57f457b0ace837e

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://git.kernel.org/stable/c/c98bed60cdd7f22237ae256cc9c1c3087206b8a2
• https://git.kernel.org/stable/c/ef57640575406f57f5b3393cf57f457b0ace837e

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