Vulnerability-Lookup

FKIE_CVE-2026-90334

Vulnerability from fkie_nvd - Published: 2026-09-17 17:17 - Updated: 2026-09-17 17:17

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: tty: clear cdev pointer after cdev_add() failure tty_cdev_add() drops the cdev reference when cdev_add() fails, but leaves driver->cdevs[index] pointing to freed memory. tty_unregister_device() later passes that stale pointer to cdev_del(), causing a use-after-free. Clear the slot after dropping the reference.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/33a44333a9dfda044b0e233399b12ead7f8a90ae
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4f6bd79bb7e55095f09bec9b4eb6c09df1306116
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5c5a795bf6248fe96f96dd9fd79d66bbb4a92077
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6645856f0df3aeecd45519cb611415b4b89c2223
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a83fcddf3c75d004f12aa13555bb73da19fb75a9
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d331c63570af61ef7aaf516b64a8d6f47518a3a4
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e9e64dd02fd68776afda00777591eca0c3984285
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fb1de260033c215dba438973d82b48562bdc86bb

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/tty_io.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fb1de260033c215dba438973d82b48562bdc86bb",
              "status": "affected",
              "version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
              "versionType": "git"
            },
            {
              "lessThan": "e9e64dd02fd68776afda00777591eca0c3984285",
              "status": "affected",
              "version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
              "versionType": "git"
            },
            {
              "lessThan": "33a44333a9dfda044b0e233399b12ead7f8a90ae",
              "status": "affected",
              "version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
              "versionType": "git"
            },
            {
              "lessThan": "d331c63570af61ef7aaf516b64a8d6f47518a3a4",
              "status": "affected",
              "version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
              "versionType": "git"
            },
            {
              "lessThan": "a83fcddf3c75d004f12aa13555bb73da19fb75a9",
              "status": "affected",
              "version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
              "versionType": "git"
            },
            {
              "lessThan": "4f6bd79bb7e55095f09bec9b4eb6c09df1306116",
              "status": "affected",
              "version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
              "versionType": "git"
            },
            {
              "lessThan": "5c5a795bf6248fe96f96dd9fd79d66bbb4a92077",
              "status": "affected",
              "version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
              "versionType": "git"
            },
            {
              "lessThan": "6645856f0df3aeecd45519cb611415b4b89c2223",
              "status": "affected",
              "version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/tty_io.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.3"
            },
            {
              "lessThan": "4.3",
              "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-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\ntty: clear cdev pointer after cdev_add() failure\n\ntty_cdev_add() drops the cdev reference when cdev_add() fails, but\nleaves driver-\u003ecdevs[index] pointing to freed memory.\ntty_unregister_device() later passes that stale pointer to cdev_del(),\ncausing a use-after-free.\n\nClear the slot after dropping the reference."
    }
  ],
  "id": "CVE-2026-90334",
  "lastModified": "2026-09-17T17:17:31.937",
  "metrics": {},
  "published": "2026-09-17T17:17:31.937",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/33a44333a9dfda044b0e233399b12ead7f8a90ae"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4f6bd79bb7e55095f09bec9b4eb6c09df1306116"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5c5a795bf6248fe96f96dd9fd79d66bbb4a92077"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6645856f0df3aeecd45519cb611415b4b89c2223"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a83fcddf3c75d004f12aa13555bb73da19fb75a9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d331c63570af61ef7aaf516b64a8d6f47518a3a4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e9e64dd02fd68776afda00777591eca0c3984285"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fb1de260033c215dba438973d82b48562bdc86bb"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-90334 (GCVE-0-2026-90334)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:08 – Updated: 2026-09-17 16:08

Title

tty: clear cdev pointer after cdev_add() failure

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/fb1de260033c215db…
https://git.kernel.org/stable/c/e9e64dd02fd68776a…
https://git.kernel.org/stable/c/33a44333a9dfda044…
https://git.kernel.org/stable/c/d331c63570af61ef7…
https://git.kernel.org/stable/c/a83fcddf3c75d004f…
https://git.kernel.org/stable/c/4f6bd79bb7e55095f…
https://git.kernel.org/stable/c/5c5a795bf6248fe96…
https://git.kernel.org/stable/c/6645856f0df3aeecd…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: c1a752ba2d6b8a52879c7ab637cff38359ea9827 , < fb1de260033c215dba438973d82b48562bdc86bb (git) Affected: c1a752ba2d6b8a52879c7ab637cff38359ea9827 , < e9e64dd02fd68776afda00777591eca0c3984285 (git) Affected: c1a752ba2d6b8a52879c7ab637cff38359ea9827 , < 33a44333a9dfda044b0e233399b12ead7f8a90ae (git) Affected: c1a752ba2d6b8a52879c7ab637cff38359ea9827 , < d331c63570af61ef7aaf516b64a8d6f47518a3a4 (git) Affected: c1a752ba2d6b8a52879c7ab637cff38359ea9827 , < a83fcddf3c75d004f12aa13555bb73da19fb75a9 (git) Affected: c1a752ba2d6b8a52879c7ab637cff38359ea9827 , < 4f6bd79bb7e55095f09bec9b4eb6c09df1306116 (git) Affected: c1a752ba2d6b8a52879c7ab637cff38359ea9827 , < 5c5a795bf6248fe96f96dd9fd79d66bbb4a92077 (git) Affected: c1a752ba2d6b8a52879c7ab637cff38359ea9827 , < 6645856f0df3aeecd45519cb611415b4b89c2223 (git)
Linux	Linux	Affected: 4.3 Unaffected: 0 , < 4.3 (semver) Unaffected: 5.10.270 , ≤ 5.10.* (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/tty_io.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fb1de260033c215dba438973d82b48562bdc86bb",
              "status": "affected",
              "version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
              "versionType": "git"
            },
            {
              "lessThan": "e9e64dd02fd68776afda00777591eca0c3984285",
              "status": "affected",
              "version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
              "versionType": "git"
            },
            {
              "lessThan": "33a44333a9dfda044b0e233399b12ead7f8a90ae",
              "status": "affected",
              "version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
              "versionType": "git"
            },
            {
              "lessThan": "d331c63570af61ef7aaf516b64a8d6f47518a3a4",
              "status": "affected",
              "version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
              "versionType": "git"
            },
            {
              "lessThan": "a83fcddf3c75d004f12aa13555bb73da19fb75a9",
              "status": "affected",
              "version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
              "versionType": "git"
            },
            {
              "lessThan": "4f6bd79bb7e55095f09bec9b4eb6c09df1306116",
              "status": "affected",
              "version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
              "versionType": "git"
            },
            {
              "lessThan": "5c5a795bf6248fe96f96dd9fd79d66bbb4a92077",
              "status": "affected",
              "version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
              "versionType": "git"
            },
            {
              "lessThan": "6645856f0df3aeecd45519cb611415b4b89c2223",
              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/tty_io.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.3"
            },
            {
              "lessThan": "4.3",
              "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-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.270",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: clear cdev pointer after cdev_add() failure\n\ntty_cdev_add() drops the cdev reference when cdev_add() fails, but\nleaves driver-\u003ecdevs[index] pointing to freed memory.\ntty_unregister_device() later passes that stale pointer to cdev_del(),\ncausing a use-after-free.\n\nClear the slot after dropping the reference."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:08:47.462Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fb1de260033c215dba438973d82b48562bdc86bb"
        },
        {
          "url": "https://git.kernel.org/stable/c/e9e64dd02fd68776afda00777591eca0c3984285"
        },
        {
          "url": "https://git.kernel.org/stable/c/33a44333a9dfda044b0e233399b12ead7f8a90ae"
        },
        {
          "url": "https://git.kernel.org/stable/c/d331c63570af61ef7aaf516b64a8d6f47518a3a4"
        },
        {
          "url": "https://git.kernel.org/stable/c/a83fcddf3c75d004f12aa13555bb73da19fb75a9"
        },
        {
          "url": "https://git.kernel.org/stable/c/4f6bd79bb7e55095f09bec9b4eb6c09df1306116"
        },
        {
          "url": "https://git.kernel.org/stable/c/5c5a795bf6248fe96f96dd9fd79d66bbb4a92077"
        },
        {
          "url": "https://git.kernel.org/stable/c/6645856f0df3aeecd45519cb611415b4b89c2223"
        }
      ],
      "title": "tty: clear cdev pointer after cdev_add() failure",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90334",
    "datePublished": "2026-09-17T16:08:47.462Z",
    "dateReserved": "2026-09-11T19:38:34.803Z",
    "dateUpdated": "2026-09-17T16:08:47.462Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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FKIE_CVE-2026-90334

CVE-2026-90334 (GCVE-0-2026-90334)

Tags

Sightings

Nomenclature

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