Tracker / CVE-2021-47579
CVE-2021-47579
Medium 5.5
In the Linux kernel, the following vulnerability has been resolved: ovl: fix warning in ovl_create_real() Syzbot triggered the following warning in ovl_workdir_create() -> ovl_create_real(): if (!err && WARN_ON(!newdentry->d_inode)) { The reason is that the cgroup2 filesystem returns from mkdir without instantiating the new dentry. Weird filesystems such as this will be rejected by overlayfs at a later stage during setup, but to prevent such a warning, call ovl_mkdir_real() directly from ovl_workdir_create() and reject this case early.
Affected products and versions
| linux | linux_kernel · … → 4.19.222 |
|---|---|
| linux | linux_kernel · 4.20 → 5.4.168 |
| linux | linux_kernel · 5.11 → 5.15.11 |
| linux | linux_kernel · 5.5 → 5.10.88 |
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.