tty: skip cdev_del() when no cdev is registered
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.
CVE-2026-90335
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-90335
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "a3a10ce3429e5dee623ad5c8407ea58e204fcb0a",
"lessThan": "ea3d2fae7c1d6492145976553817d22e8ef69a0e",
"versionType": "git"
},
{
"status": "affected",
"version": "a3a10ce3429e5dee623ad5c8407ea58e204fcb0a",
"lessThan": "21031bd0d662549412378110c989b164feb6e4be",
"versionType": "git"
},
{
"status": "affected",
"version": "a3a10ce3429e5dee623ad5c8407ea58e204fcb0a",
"lessThan": "2af4c46b429907edc8cb069c78fca1d950120b98",
"versionType": "git"
},
{
"status": "affected",
"version": "a3a10ce3429e5dee623ad5c8407ea58e204fcb0a",
"lessThan": "3dbf85ef40b6366ba15e882f7536cdc98bea579a",
"versionType": "git"
},
{
"status": "affected",
"version": "a3a10ce3429e5dee623ad5c8407ea58e204fcb0a",
"lessThan": "c3b5623fd97648f2747444aa8932ae604662df93",
"versionType": "git"
}
],
"programFiles": [
"drivers/tty/tty_io.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/tty/tty_io.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90335
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48668 · Revision 1
- Added to Heist Feed
- Publisher date