Unknown · Contiki-Ng · CVE-2023-50926
**Name of the Vulnerable Software and Affected Versions**
Contiki-NG versions prior to the next release
**Description**
An out-of-bounds read can be caused by an incoming DIO message when using the RPL-Lite implementation in the Contiki-NG operating system. The prefix information of the DIO message contains a field that specifies the length of an IPv6 address prefix. The value of this field is not validated, which means that an attacker can set a value that is longer than the maximum prefix length. Subsequently, a `memcmp` function call that compares different prefixes can be called with a length argument that surpasses the boundary of the array allocated for the prefix, causing an out-of-bounds read.
**Recommendations**
Update to the next release of Contiki-NG as soon as it is available.
Alternatively, manually apply the changes in Contiki-NG pull request #2721 to patch the issue.