Riskcovery

CVE-2024-42224

net: dsa: mv88e6xxx: Correct check for empty list

State
Published
Severity
7.0 High
Published
Jul 30, 2024
Updated
Aug 5, 2026
Reserved
Jul 30, 2024

Read the record on cve.org

Description

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.

Scores

CVSSScoreVectorSource
3.17.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • a3c53be55c955b7150cda17874c3fcb4eeb97a89 to before 47d28dde172696031c880c5778633cdca30394eeAffected
  • a3c53be55c955b7150cda17874c3fcb4eeb97a89 to before 3bf8d70e1455f87856640c3433b3660a31001618Affected
  • a3c53be55c955b7150cda17874c3fcb4eeb97a89 to before 2a2fe25a103cef73cde356e6d09da10f607e93f5Affected
  • a3c53be55c955b7150cda17874c3fcb4eeb97a89 to before 8c2c3cca816d074c75a2801d1ca0dea7b0148114Affected
  • a3c53be55c955b7150cda17874c3fcb4eeb97a89 to before aa03f591ef31ba603a4a99d05d25a0f21ab1cd89Affected
  • a3c53be55c955b7150cda17874c3fcb4eeb97a89 to before 3f25b5f1635449036692a44b771f39f772190c1dAffected
  • a3c53be55c955b7150cda17874c3fcb4eeb97a89 to before f75625db838ade28f032dacd0f0c8baca42ecde4Affected
  • a3c53be55c955b7150cda17874c3fcb4eeb97a89 to before 4c7f3950a9fd53a62b156c0fe7c3a2c43b0ba19bAffected
LinuxLinux
  • 4.11Affected
  • before 4.11Not affected
  • 4.19.318 through 4.19.*Not affected
  • 5.4.280 through 5.4.*Not affected
  • 5.10.222 through 5.10.*Not affected
  • 5.15.163 through 5.15.*Not affected
  • 6.1.98 through 6.1.*Not affected
  • 6.6.39 through 6.6.*Not affected
  • 6.9.9 through 6.9.*Not affected
  • 6.10 and laterNot affected

References

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