CVE-2026-64058 netfs: Fix netfs_read_folio() to wait on writeback
A race condition in the Linux kernel netfs module allows attackers to trigger memory corruption or denial of service by exploiting improper writeback synchronization.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-64058?
CVE-2026-64058 is a high-severity vulnerability in Linux kernel, published on 19 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
netfs: Fix netfs_read_folio() to wait on writeback
Fix netfs_read_folio() to wait for an ongoing writeback to complete so that it can trust the dirty flag and whatever is attached to folio->private (folio->private may get cleaned up by the collector before it clears the writeback flag).
Weakness: CWE-125
Which versions are affected by CVE-2026-64058?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-64058?
Apply the vendor's patch.
Is CVE-2026-64058 being exploited?
There is no known exploitation of CVE-2026-64058 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-64058, DEBIAN-CVE-2026-64058, GHSA-m5w8-868m-233w, ROOT-OS-DEBIAN-13-CVE-2026-64058, UBUNTU-CVE-2026-64058.