Tracker / CVE-2021-46966
CVE-2021-46966
High 7.8
In the Linux kernel, the following vulnerability has been resolved: ACPI: custom_method: fix potential use-after-free issue In cm_write(), buf is always freed when reaching the end of the function. If the requested count is less than table.length, the allocated buffer will be freed but subsequent calls to cm_write() will still try to access it. Remove the unconditional kfree(buf) at the end of the function and set the buf to NULL in the -EINVAL error path to match the rest of function.
Affected products and versions
| linux | linux_kernel · 4.14.147 → 4.14.233 |
|---|---|
| linux | linux_kernel · 4.19.77 → 4.19.191 |
| linux | linux_kernel · 4.4.195 → 4.4.269 |
| linux | linux_kernel · 4.9.195 → 4.9.269 |
| linux | linux_kernel · 5.11 → 5.11.20 |
| linux | linux_kernel · 5.12 → 5.12.3 |
| linux | linux_kernel · 5.4 → 5.4.118 |
| linux | linux_kernel · 5.5 → 5.10.36 |
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.