tty: clear cdev pointer after cdev_add() failure
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.
CVE-2026-90334
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-2026-90334
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": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
"lessThan": "fb1de260033c215dba438973d82b48562bdc86bb",
"versionType": "git"
},
{
"status": "affected",
"version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
"lessThan": "e9e64dd02fd68776afda00777591eca0c3984285",
"versionType": "git"
},
{
"status": "affected",
"version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
"lessThan": "33a44333a9dfda044b0e233399b12ead7f8a90ae",
"versionType": "git"
},
{
"status": "affected",
"version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
"lessThan": "d331c63570af61ef7aaf516b64a8d6f47518a3a4",
"versionType": "git"
},
{
"status": "affected",
"version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
"lessThan": "a83fcddf3c75d004f12aa13555bb73da19fb75a9",
"versionType": "git"
},
{
"status": "affected",
"version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
"lessThan": "4f6bd79bb7e55095f09bec9b4eb6c09df1306116",
"versionType": "git"
},
{
"status": "affected",
"version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
"lessThan": "5c5a795bf6248fe96f96dd9fd79d66bbb4a92077",
"versionType": "git"
},
{
"status": "affected",
"version": "c1a752ba2d6b8a52879c7ab637cff38359ea9827",
"lessThan": "6645856f0df3aeecd45519cb611415b4b89c2223",
"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": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"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-2026-90334
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36677 · Revision 1
- Added to Heist Feed
- Publisher date