CVE-2026-89745
Description
In the Linux kernel, the following vulnerability has been resolved: debugfs: Fix lockdown check for mmap_prepare Commit 651fdda8406d ("relay: update relay to use mmap_prepare") changed the `mmap` file operation to `mmap_prepare` for relayfs, but the lockdown check in debugfs was not updated accordingly. This prevents debugfs from being locked down when the kernel is in integrity mode if a file uses `mmap_prepare` but not `mmap`. Since the conversion to `mmap_prepare` across the kernel is not yet complete, update the lockdown check to look for both `mmap` and `mmap_prepare` to ensure comprehensive coverage.
How to fix
- Linux Linuxe7f6a6b5741d16fdac7adaecbe0fa52ae756f208, f81808de37338aac8e167f99bfae647b1b835c70 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 651fdda8406d42a5004c5c79f269540a85d6a1ab ≤ v < e7f6a6b5741d16fdac7adaecbe0fa52ae756f208, 651fdda8406d42a5004c5c79f269540a85d6a1ab ≤ v < f81808de37338aac8e167f99bfae647b1b835c70, 6.19 | e7f6a6b5741d16fdac7adaecbe0fa52ae756f208, f81808de37338aac8e167f99bfae647b1b835c70 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.