CVE-2026-90334
tty: clear cdev pointer after cdev_add() failure
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 17, 2026 |
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Affected Versions
Linux / Linux
c1a752ba2d6b8a52879c7ab637cff38359ea9827 < fb1de260033c215dba438973d82b48562bdc86bb c1a752ba2d6b8a52879c7ab637cff38359ea9827 < e9e64dd02fd68776afda00777591eca0c3984285 c1a752ba2d6b8a52879c7ab637cff38359ea9827 < 33a44333a9dfda044b0e233399b12ead7f8a90ae c1a752ba2d6b8a52879c7ab637cff38359ea9827 < d331c63570af61ef7aaf516b64a8d6f47518a3a4 c1a752ba2d6b8a52879c7ab637cff38359ea9827 < a83fcddf3c75d004f12aa13555bb73da19fb75a9 c1a752ba2d6b8a52879c7ab637cff38359ea9827 < 4f6bd79bb7e55095f09bec9b4eb6c09df1306116 c1a752ba2d6b8a52879c7ab637cff38359ea9827 < 5c5a795bf6248fe96f96dd9fd79d66bbb4a92077 c1a752ba2d6b8a52879c7ab637cff38359ea9827 < 6645856f0df3aeecd45519cb611415b4b89c2223
Linux / Linux
4.3
References
git.kernel.org: https://git.kernel.org/stable/c/fb1de260033c215dba438973d82b48562bdc86bb git.kernel.org: https://git.kernel.org/stable/c/e9e64dd02fd68776afda00777591eca0c3984285 git.kernel.org: https://git.kernel.org/stable/c/33a44333a9dfda044b0e233399b12ead7f8a90ae git.kernel.org: https://git.kernel.org/stable/c/d331c63570af61ef7aaf516b64a8d6f47518a3a4 git.kernel.org: https://git.kernel.org/stable/c/a83fcddf3c75d004f12aa13555bb73da19fb75a9 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