CVE-2026-89745

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.

Package Linux Kernel
Published 2026-09-11
Last modified 2026-09-11
Patch available
Yes

Affected versions

Linux kernel versions 6.19 and later are affected. Fixed in 7.2.4, 7.3-rc1 and their respective stable series.

Affected from
≥ 6.19
Fixed in
✓ 7.2.4 7.2.x ✓ 7.3-rc1

References

2 total

Frequently asked questions

  • What is CVE-2026-89745?

    CVE-2026-89745 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.19 onward and has been patched in 7.2.4 and 7.3-rc1. CVE-2026-89745 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • Is there a patch available for CVE-2026-89745?

    Yes. CVE-2026-89745 has been patched. Fixed versions include 7.2.4 and 7.3-rc1. If you are running Linux kernel 6.19 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2026-89745 actively exploited?

    No. CVE-2026-89745 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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