CVE-2026-90335
Unknown
Description
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.
SeverityUnknown
CVSS—
Exploit probability—
Product
Linux
PublishedSep 17, 2026
First seenSep 17, 2026
How to fix
Update
- Linux Linux6c92b8d9c23a92f85b20bee3578d0f19cd1b1a68, ea3d2fae7c1d6492145976553817d22e8ef69a0e, 21031bd0d662549412378110c989b164feb6e4be, 2af4c46b429907edc8cb069c78fca1d950120b98, 3dbf85ef40b6366ba15e882f7536cdc98bea579a, c3b5623fd97648f2747444aa8932ae604662df93 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | a3a10ce3429e5dee623ad5c8407ea58e204fcb0a ≤ v < 6c92b8d9c23a92f85b20bee3578d0f19cd1b1a68, a3a10ce3429e5dee623ad5c8407ea58e204fcb0a ≤ v < ea3d2fae7c1d6492145976553817d22e8ef69a0e, a3a10ce3429e5dee623ad5c8407ea58e204fcb0a ≤ v < 21031bd0d662549412378110c989b164feb6e4be, a3a10ce3429e5dee623ad5c8407ea58e204fcb0a ≤ v < 2af4c46b429907edc8cb069c78fca1d950120b98, a3a10ce3429e5dee623ad5c8407ea58e204fcb0a ≤ v < 3dbf85ef40b6366ba15e882f7536cdc98bea579a, a3a10ce3429e5dee623ad5c8407ea58e204fcb0a ≤ v < c3b5623fd97648f2747444aa8932ae604662df93, 4.3 | 6c92b8d9c23a92f85b20bee3578d0f19cd1b1a68, ea3d2fae7c1d6492145976553817d22e8ef69a0e, 21031bd0d662549412378110c989b164feb6e4be, 2af4c46b429907edc8cb069c78fca1d950120b98, 3dbf85ef40b6366ba15e882f7536cdc98bea579a, c3b5623fd97648f2747444aa8932ae604662df93 |
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