Unrated severityNVD Advisory· Published Sep 17, 2026
CVE-2026-90334
CVE-2026-90334
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
1Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/33a44333a9dfda044b0e233399b12ead7f8a90aenvd
- git.kernel.org/stable/c/4f6bd79bb7e55095f09bec9b4eb6c09df1306116nvd
- git.kernel.org/stable/c/5c5a795bf6248fe96f96dd9fd79d66bbb4a92077nvd
- git.kernel.org/stable/c/6645856f0df3aeecd45519cb611415b4b89c2223nvd
- git.kernel.org/stable/c/a83fcddf3c75d004f12aa13555bb73da19fb75a9nvd
- git.kernel.org/stable/c/d331c63570af61ef7aaf516b64a8d6f47518a3a4nvd
- git.kernel.org/stable/c/e9e64dd02fd68776afda00777591eca0c3984285nvd
- git.kernel.org/stable/c/fb1de260033c215dba438973d82b48562bdc86bbnvd
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