CVE-2021-47579
Medium
Description
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.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedJun 19, 2024
First seenJun 19, 2024
How to fix
Update
- linux linux_kernel4.19.222, 5.4.168, 5.10.88, 5.15.11 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v < 4.19.222, 4.20 ≤ v < 5.4.168, 5.5 ≤ v < 5.10.88, 5.11 ≤ v < 5.15.11 | 4.19.222, 5.4.168, 5.10.88, 5.15.11 |
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