FKIE_CVE-2026-90219

Vulnerability from fkie_nvd - Published: 2026-09-17 17:17 - Updated: 2026-10-19 09:19
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: Free debugfs on registration failure c4iw_alloc() creates the per-device debugfs tree (dev->debugfs_root via setup_debugfs()), but it is removed only in c4iw_remove(), not in c4iw_dealloc(). When RDMA device registration fails, the registration worker's err_dealloc_ctx path calls c4iw_dealloc() directly, bypassing c4iw_remove(), so the debugfs dentries leak and outlive the freed c4iw_dev. Move debugfs_remove_recursive() into c4iw_dealloc() so every path that frees ctx->dev also removes its debugfs tree.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/046425412529dbfca1433c8bef5641b271b4ab2a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/459b59f7ed56511d6529311cb4e5e482ebfcfb8e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/479a7f90060e62bdd9bb4036ec0a70bf460f6d23
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c332d9e7dce234d8bef78271d003a68ee943b61b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cd60992f09b7e83bfd3c76e3bb06b29f3e2fa0a8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ea41b5630fa3d9877ce9ed8832cf5575f742bfbb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f98e894ec029a752cf9c7f7834741bead0fb463d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fe5c16bb6252dea6025b748257ddc3b2665495b0
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/cxgb4/device.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "459b59f7ed56511d6529311cb4e5e482ebfcfb8e",
              "status": "affected",
              "version": "49ea0c036ede81f126f1a9389d377999fdf5c5a1",
              "versionType": "git"
            },
            {
              "lessThan": "cd60992f09b7e83bfd3c76e3bb06b29f3e2fa0a8",
              "status": "affected",
              "version": "49ea0c036ede81f126f1a9389d377999fdf5c5a1",
              "versionType": "git"
            },
            {
              "lessThan": "c332d9e7dce234d8bef78271d003a68ee943b61b",
              "status": "affected",
              "version": "49ea0c036ede81f126f1a9389d377999fdf5c5a1",
              "versionType": "git"
            },
            {
              "lessThan": "f98e894ec029a752cf9c7f7834741bead0fb463d",
              "status": "affected",
              "version": "49ea0c036ede81f126f1a9389d377999fdf5c5a1",
              "versionType": "git"
            },
            {
              "lessThan": "479a7f90060e62bdd9bb4036ec0a70bf460f6d23",
              "status": "affected",
              "version": "49ea0c036ede81f126f1a9389d377999fdf5c5a1",
              "versionType": "git"
            },
            {
              "lessThan": "046425412529dbfca1433c8bef5641b271b4ab2a",
              "status": "affected",
              "version": "49ea0c036ede81f126f1a9389d377999fdf5c5a1",
              "versionType": "git"
            },
            {
              "lessThan": "ea41b5630fa3d9877ce9ed8832cf5575f742bfbb",
              "status": "affected",
              "version": "49ea0c036ede81f126f1a9389d377999fdf5c5a1",
              "versionType": "git"
            },
            {
              "lessThan": "fe5c16bb6252dea6025b748257ddc3b2665495b0",
              "status": "affected",
              "version": "49ea0c036ede81f126f1a9389d377999fdf5c5a1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "98fa991017981b52dcc4dc3924fc8e1e83e41bf4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "af92e4a595e006b498c44b617ea38f697eca3469",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9c0cec79e5c914662c2cf98b4a729c0fcc8c872e",
              "versionType": "git"
            },
            {
              "lessThan": "4.20",
              "status": "affected",
              "version": "4.19.130",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.49",
              "versionType": "semver"
            },
            {
              "lessThan": "5.8",
              "status": "affected",
              "version": "5.7.6",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/cxgb4/device.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.8"
            },
            {
              "lessThan": "5.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "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\nRDMA/cxgb4: Free debugfs on registration failure\n\nc4iw_alloc() creates the per-device debugfs tree (dev-\u003edebugfs_root via\nsetup_debugfs()), but it is removed only in c4iw_remove(), not in\nc4iw_dealloc().  When RDMA device registration fails, the registration\nworker\u0027s err_dealloc_ctx path calls c4iw_dealloc() directly, bypassing\nc4iw_remove(), so the debugfs dentries leak and outlive the freed\nc4iw_dev.\n\nMove debugfs_remove_recursive() into c4iw_dealloc() so every path that\nfrees ctx-\u003edev also removes its debugfs tree."
    }
  ],
  "id": "CVE-2026-90219",
  "lastModified": "2026-10-19T09:19:12.073",
  "metrics": {},
  "published": "2026-09-17T17:17:17.290",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/046425412529dbfca1433c8bef5641b271b4ab2a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/459b59f7ed56511d6529311cb4e5e482ebfcfb8e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/479a7f90060e62bdd9bb4036ec0a70bf460f6d23"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c332d9e7dce234d8bef78271d003a68ee943b61b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cd60992f09b7e83bfd3c76e3bb06b29f3e2fa0a8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ea41b5630fa3d9877ce9ed8832cf5575f742bfbb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f98e894ec029a752cf9c7f7834741bead0fb463d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fe5c16bb6252dea6025b748257ddc3b2665495b0"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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