{"id":"CVE-2026-90334","title":"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->cdevs[index] pointing to freed memor…","summary":"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->cdevs[index] pointing to freed memor…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= c1a752ba2d6b8a52879c7ab637cff38359ea9827 < fb1de260033c215dba438973d82b48562bdc86bb","Linux >= c1a752ba2d6b8a52879c7ab637cff38359ea9827 < e9e64dd02fd68776afda00777591eca0c3984285","Linux >= c1a752ba2d6b8a52879c7ab637cff38359ea9827 < 33a44333a9dfda044b0e233399b12ead7f8a90ae","Linux >= c1a752ba2d6b8a52879c7ab637cff38359ea9827 < d331c63570af61ef7aaf516b64a8d6f47518a3a4","Linux >= c1a752ba2d6b8a52879c7ab637cff38359ea9827 < a83fcddf3c75d004f12aa13555bb73da19fb75a9","Linux >= c1a752ba2d6b8a52879c7ab637cff38359ea9827 < 4f6bd79bb7e55095f09bec9b4eb6c09df1306116","Linux >= c1a752ba2d6b8a52879c7ab637cff38359ea9827 < 5c5a795bf6248fe96f96dd9fd79d66bbb4a92077","Linux >= c1a752ba2d6b8a52879c7ab637cff38359ea9827 < 6645856f0df3aeecd45519cb611415b4b89c2223","Linux 4.3"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:31.937","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90334","references":[{"url":"https://git.kernel.org/stable/c/33a44333a9dfda044b0e233399b12ead7f8a90ae","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4f6bd79bb7e55095f09bec9b4eb6c09df1306116","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5c5a795bf6248fe96f96dd9fd79d66bbb4a92077","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6645856f0df3aeecd45519cb611415b4b89c2223","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a83fcddf3c75d004f12aa13555bb73da19fb75a9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d331c63570af61ef7aaf516b64a8d6f47518a3a4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e9e64dd02fd68776afda00777591eca0c3984285","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fb1de260033c215dba438973d82b48562bdc86bb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.819Z","epss":0.0021,"epssPercentile":0.11524,"slug":"CVE-2026-90334","body":"## Overview\n\nIn 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->cdevs[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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}