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FKIE_CVE-2026-89745

Vulnerability from fkie_nvd - Published: 2026-09-11 20:20 - Updated: 2026-09-11 20:20
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e7f6a6b5741d16fdac7adaecbe0fa52ae756f208
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f81808de37338aac8e167f99bfae647b1b835c70
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/debugfs/file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e7f6a6b5741d16fdac7adaecbe0fa52ae756f208",
              "status": "affected",
              "version": "651fdda8406d42a5004c5c79f269540a85d6a1ab",
              "versionType": "git"
            },
            {
              "lessThan": "f81808de37338aac8e167f99bfae647b1b835c70",
              "status": "affected",
              "version": "651fdda8406d42a5004c5c79f269540a85d6a1ab",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/debugfs/file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "lessThan": "6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndebugfs: Fix lockdown check for mmap_prepare\n\nCommit 651fdda8406d (\"relay: update relay to use mmap_prepare\")\nchanged the `mmap` file operation to `mmap_prepare` for relayfs, but\nthe lockdown check in debugfs was not updated accordingly.\n\nThis prevents debugfs from being locked down when the kernel is in\nintegrity mode if a file uses `mmap_prepare` but not `mmap`.\n\nSince the conversion to `mmap_prepare` across the kernel is not yet\ncomplete, update the lockdown check to look for both `mmap` and\n`mmap_prepare` to ensure comprehensive coverage."
    }
  ],
  "id": "CVE-2026-89745",
  "lastModified": "2026-09-11T20:20:05.260",
  "metrics": {},
  "published": "2026-09-11T20:20:05.260",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e7f6a6b5741d16fdac7adaecbe0fa52ae756f208"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f81808de37338aac8e167f99bfae647b1b835c70"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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