CVE-2022-48854

Summary

In the Linux kernel, the following vulnerability has been resolved:

net: arc_emac: Fix use after free in arc_mdio_probe()

If bus->state is equal to MDIOBUS_ALLOCATED, mdiobus_free(bus) will free the "bus". But bus->name is still used in the next line, which will lead to a use after free.

We can fix it by putting the name in a local variable and make the bus->name point to the rodata section "name",then use the name in the error message without referring to bus to avoid the uaf.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux95b5fc03c189e4ea5c63785274cc0b77fcc3a818 < 84c831803785c2c3bec5c28c0e8a0b72f6b41d4daffected
LinuxLinux95b5fc03c189e4ea5c63785274cc0b77fcc3a818 < bc0e610a6eb0d46e4123fafdbe5e6141d9fff3beaffected
LinuxLinux5.16affected
LinuxLinux0 < 5.16unaffected
LinuxLinux5.16.15 <= 5.16.*unaffected
LinuxLinux5.17 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

References