CVE-2026-89745debugfs: Fix lockdown check for mmap_prepare
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 651fdda8406d42a5004c5c79f269540a85d6a1ab before e7f6a6b5741d16fdac7adaecbe0fa52ae756f208; from 651fdda8406d42a5004c5c79f269540a85d6a1ab before f81808de37338aac8e167f99bfae647b1b835c70 | CNA record |
References
- https://git.kernel.org/stable/c/e7f6a6b5741d16fdac7adaecbe0fa52ae756f208
- https://git.kernel.org/stable/c/f81808de37338aac8e167f99bfae647b1b835c70
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.