IT

Tracker / CVE-2022-49425

CVE-2022-49425

High 7.8

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix dereference of stale list iterator after loop body The list iterator variable will be a bogus pointer if no break was hit. Dereferencing it (cur->page in this case) could load an out-of-bounds/undefined value making it unsafe to use that in the comparision to determine if the specific element was found. Since 'cur->page' *can* be out-ouf-bounds it cannot be guaranteed that by chance (or intention of an attacker) it matches the value of 'page' even though the correct element was not found. This is fixed by using a separate list iterator variable for the loop and only setting the original variable if a suitable element was found. Then determing if the element was found is simply checking if the variable is set.

Affected products and versions

linux linux_kernel · 4.12 → 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