Name of the Vulnerable Software and Affected Versions Linux Kernel versions prior to 5.4.156

Description The issue is related to the isdn and cpai components, where a check on ctr->cnr is necessary to prevent an array index out of bounds condition. The actual impact and attack plausibility have not yet been proven.

Recommendations For Linux Kernel versions prior to 5.4.156, update to version 5.4.156 or later to resolve the issue. As a temporary workaround, consider implementing additional checks on the ctr->cnr variable to prevent array index out of bounds conditions until a patch is applied.