CVE-2023-52679

Summary

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

of: Fix double free in of_parse_phandle_with_args_map

In of_parse_phandle_with_args_map() the inner loop that iterates through the map entries calls of_node_put(new) to free the reference acquired by the previous iteration of the inner loop. This assumes that the value of "new" is NULL on the first iteration of the inner loop.

Make sure that this is true in all iterations of the outer loop by setting "new" to NULL after its value is assigned to "cur".

Extend the unittest to detect the double free and add an additional test case that actually triggers this path.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxbd6f2fd5a1d52198468c5cdc3c2472362dff5aaa < 26b4d702c44f9e5cf3c5c001ae619a4a001889dbaffected
LinuxLinuxbd6f2fd5a1d52198468c5cdc3c2472362dff5aaa < a0a061151a6200c13149dbcdb6c065203c8425d2affected
LinuxLinuxbd6f2fd5a1d52198468c5cdc3c2472362dff5aaa < d5f490343c77e6708b6c4aa7dbbfbcbb9546adeaaffected
LinuxLinuxbd6f2fd5a1d52198468c5cdc3c2472362dff5aaa < 4541004084527ce9e95a818ebbc4e6b293ffca21affected
LinuxLinuxbd6f2fd5a1d52198468c5cdc3c2472362dff5aaa < b9d760dae5b10e73369b769073525acd7b3be2bdaffected
LinuxLinuxbd6f2fd5a1d52198468c5cdc3c2472362dff5aaa < b64d09a4e8596f76d27f4b4a90a1cf6baf6a82f8affected
LinuxLinuxbd6f2fd5a1d52198468c5cdc3c2472362dff5aaa < cafa992134124e785609a406da4ff2b54052aff7affected
LinuxLinuxbd6f2fd5a1d52198468c5cdc3c2472362dff5aaa < 4dde83569832f9377362e50f7748463340c5db6baffected
LinuxLinux4.17affected
LinuxLinux0 < 4.17unaffected
LinuxLinux4.19.306 <= 4.19.*unaffected
LinuxLinux5.4.268 <= 5.4.*unaffected
LinuxLinux5.10.209 <= 5.10.*unaffected
LinuxLinux5.15.148 <= 5.15.*unaffected
LinuxLinux6.1.75 <= 6.1.*unaffected
LinuxLinux6.6.14 <= 6.6.*unaffected
LinuxLinux6.7.2 <= 6.7.*unaffected
LinuxLinux6.8 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References