IT

Tracker / CVE-2022-49410

CVE-2022-49410

High 7.8

In the Linux kernel, the following vulnerability has been resolved: tracing: Fix potential double free in create_var_ref() In create_var_ref(), init_var_ref() is called to initialize the fields of variable ref_field, which is allocated in the previous function call to create_hist_field(). Function init_var_ref() allocates the corresponding fields such as ref_field->system, but frees these fields when the function encounters an error. The caller later calls destroy_hist_field() to conduct error handling, which frees the fields and the variable itself. This results in double free of the fields which are already freed in the previous function. Fix this by storing NULL to the corresponding fields when they are freed in init_var_ref().

Affected products and versions

linux linux_kernel · 4.17 → 4.19.247
linux linux_kernel · 4.20 → 5.4.198
linux linux_kernel · 5.11 → 5.15.46
linux linux_kernel · 5.16 → 5.17.14
linux linux_kernel · 5.18 → 5.18.3
linux linux_kernel · 5.5 → 5.10.121

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References