CVE-2022-49721

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.19.0-rc2-00002-g4d9ead8b45ce

Description The issue arises from inconsistent handling of PLT entries in the Linux kernel's ftrace functionality. Specifically, the ftrace modify call() function does not handle PLT entries correctly, leading to potential internal ftrace errors or kernel panics. This can occur when ftrace modify call() is used for a callsite that requires a PLT entry for a trampoline. The estimated number of potentially affected devices is not provided.

Recommendations For Linux kernel versions prior to 5.19.0-00002-g4d9ead8b45ce, consider updating to a newer version that includes the fix for consistently handling PLT entries. As a temporary workaround, avoid using the ftrace modify call() function for callsites that require a PLT entry for a trampoline.