SEPTEMBER 14, 2026
Live Feed
Back to database
Case File

CVE-2026-89745

UNKNOWN · CVSS N/A EPSS 0.15%

Source: NVD + CISA KEV + EPSS · Published 2026-09-11 · Last synced 2026-09-14

CyberRota Analysis

AI-Generated

The vulnerability affects the Linux kernel's debugfs, where the lockdown mechanism fails to enforce restrictions when using the `mmap_prepare` operation due to an oversight in the lockdown check. This could allow unauthorized access to sensitive debug information when the kernel is in integrity mode, potentially compromising system security. Linux system administrators and developers working with kernel-level operations should prioritize this issue to ensure robust security measures are maintained.

CVE
CVE-2026-89745
Severity
UNKNOWN
CVSS
N/A
EPSS
0.15%
Linux

Original NVD 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.