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

Vulnerability from cvelistv5 – Published: 2026-09-17 16:08 – Updated: 2026-09-17 16:08
VLAI
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
References
Impacted products
Vendor Product Version CPE status
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)
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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)
guessed Create a notification for this product.
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          "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": {
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "dateReserved": "2026-09-11T19:38:34.803Z",
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    "state": "PUBLISHED"
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    },
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      "cve": "CVE-2026-90334",
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      "status": "final",
      "title": "tty: clear cdev pointer after cdev_add() failure",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-90334.json",
      "version": "2"
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          }
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        "vulnStatus": "Received"
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    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-09-21T16:28:19Z",
      "cve": "CVE-2026-90334",
      "id": "CVE-2026-90334",
      "initial_release_date": "2026-09-21T16:28:19Z",
      "product_status:known_affected": "265",
      "product_status:known_not_affected": "82",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-90334",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-90334.json",
      "version": "2"
    }
  }
}



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