CVE-2026-90335
tty: skip cdev_del() when no cdev is registered
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: tty: skip cdev_del() when no cdev is registered TTY device registration can fail before a cdev is allocated. Serial core keeps the port so setserial can still use it, and later removal passes the NULL cdev slot to cdev_del(), causing a NULL-pointer dereference. Only delete the cdev when the slot is not NULL.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 17, 2026 |
| Last Updated | Oct 30, 2026 |
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Affected Versions
Linux / Linux
a3a10ce3429e5dee623ad5c8407ea58e204fcb0a < 6c92b8d9c23a92f85b20bee3578d0f19cd1b1a68 a3a10ce3429e5dee623ad5c8407ea58e204fcb0a < ea3d2fae7c1d6492145976553817d22e8ef69a0e a3a10ce3429e5dee623ad5c8407ea58e204fcb0a < 21031bd0d662549412378110c989b164feb6e4be a3a10ce3429e5dee623ad5c8407ea58e204fcb0a < 2af4c46b429907edc8cb069c78fca1d950120b98 a3a10ce3429e5dee623ad5c8407ea58e204fcb0a < 3dbf85ef40b6366ba15e882f7536cdc98bea579a a3a10ce3429e5dee623ad5c8407ea58e204fcb0a < c3b5623fd97648f2747444aa8932ae604662df93
Linux / Linux
4.3
References
git.kernel.org: https://git.kernel.org/stable/c/6c92b8d9c23a92f85b20bee3578d0f19cd1b1a68 git.kernel.org: https://git.kernel.org/stable/c/ea3d2fae7c1d6492145976553817d22e8ef69a0e git.kernel.org: https://git.kernel.org/stable/c/21031bd0d662549412378110c989b164feb6e4be git.kernel.org: https://git.kernel.org/stable/c/2af4c46b429907edc8cb069c78fca1d950120b98 git.kernel.org: https://git.kernel.org/stable/c/3dbf85ef40b6366ba15e882f7536cdc98bea579a git.kernel.org: https://git.kernel.org/stable/c/c3b5623fd97648f2747444aa8932ae604662df93