CVE-2024-42224

Summary

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

net: dsa: mv88e6xxx: Correct check for empty list

Since commit a3c53be55c95 ("net: dsa: mv88e6xxx: Support multiple MDIO busses") mv88e6xxx_default_mdio_bus() has checked that the return value of list_first_entry() is non-NULL.

This appears to be intended to guard against the list chip->mdios being empty. However, it is not the correct check as the implementation of list_first_entry is not designed to return NULL for empty lists.

Instead, use list_first_entry_or_null() which does return NULL if the list is empty.

Flagged by Smatch. Compile tested only.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa3c53be55c955b7150cda17874c3fcb4eeb97a89 < 47d28dde172696031c880c5778633cdca30394eeaffected
LinuxLinuxa3c53be55c955b7150cda17874c3fcb4eeb97a89 < 3bf8d70e1455f87856640c3433b3660a31001618affected
LinuxLinuxa3c53be55c955b7150cda17874c3fcb4eeb97a89 < 2a2fe25a103cef73cde356e6d09da10f607e93f5affected
LinuxLinuxa3c53be55c955b7150cda17874c3fcb4eeb97a89 < 8c2c3cca816d074c75a2801d1ca0dea7b0148114affected
LinuxLinuxa3c53be55c955b7150cda17874c3fcb4eeb97a89 < aa03f591ef31ba603a4a99d05d25a0f21ab1cd89affected
LinuxLinuxa3c53be55c955b7150cda17874c3fcb4eeb97a89 < 3f25b5f1635449036692a44b771f39f772190c1daffected
LinuxLinuxa3c53be55c955b7150cda17874c3fcb4eeb97a89 < f75625db838ade28f032dacd0f0c8baca42ecde4affected
LinuxLinuxa3c53be55c955b7150cda17874c3fcb4eeb97a89 < 4c7f3950a9fd53a62b156c0fe7c3a2c43b0ba19baffected
LinuxLinux4.11affected
LinuxLinux0 < 4.11unaffected
LinuxLinux4.19.318 <= 4.19.*unaffected
LinuxLinux5.4.280 <= 5.4.*unaffected
LinuxLinux5.10.222 <= 5.10.*unaffected
LinuxLinux5.15.163 <= 5.15.*unaffected
LinuxLinux6.1.98 <= 6.1.*unaffected
LinuxLinux6.6.39 <= 6.6.*unaffected
LinuxLinux6.9.9 <= 6.9.*unaffected
LinuxLinux6.10 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

References