Vulnerability-Lookup

GHSA-346V-HCMM-349W

Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-09-17 18:32

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-90334"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-17T17:17:31Z",
    "severity": null
  },
  "details": "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": "GHSA-346v-hcmm-349w",
  "modified": "2026-09-17T18:32:02Z",
  "published": "2026-09-17T18:32:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90334"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/33a44333a9dfda044b0e233399b12ead7f8a90ae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f6bd79bb7e55095f09bec9b4eb6c09df1306116"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5c5a795bf6248fe96f96dd9fd79d66bbb4a92077"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6645856f0df3aeecd45519cb611415b4b89c2223"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a83fcddf3c75d004f12aa13555bb73da19fb75a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d331c63570af61ef7aaf516b64a8d6f47518a3a4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e9e64dd02fd68776afda00777591eca0c3984285"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fb1de260033c215dba438973d82b48562bdc86bb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

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.

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)

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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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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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GHSA-346V-HCMM-349W

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

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