CVEvulnerability
CVE-2026-90334
- Status
- Received
- Published
- 2026-09-17
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
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
- https://git.kernel.org/stable/c/33a44333a9dfda044b0e233399b12ead7f8a90ae git.kernel.org
- https://git.kernel.org/stable/c/4f6bd79bb7e55095f09bec9b4eb6c09df1306116 git.kernel.org
- https://git.kernel.org/stable/c/5c5a795bf6248fe96f96dd9fd79d66bbb4a92077 git.kernel.org
- https://git.kernel.org/stable/c/6645856f0df3aeecd45519cb611415b4b89c2223 git.kernel.org
- https://git.kernel.org/stable/c/a83fcddf3c75d004f12aa13555bb73da19fb75a9 git.kernel.org
- https://git.kernel.org/stable/c/d331c63570af61ef7aaf516b64a8d6f47518a3a4 git.kernel.org
- https://git.kernel.org/stable/c/e9e64dd02fd68776afda00777591eca0c3984285 git.kernel.org
- https://git.kernel.org/stable/c/fb1de260033c215dba438973d82b48562bdc86bb git.kernel.org