CVE-2026-90334
Full vulnerability record from the local CVENow database.
Description
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.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-17 17:17:31.937000
Last modified
2026-10-19 09:19:27.497000
View original CVE JSON
{
"id": "CVE-2026-90334",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-17T17:17:31.937",
"lastModified": "2026-10-19T09:19:27.497",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: clear cdev pointer after cdev_add() failure\n\ntty_cdev_add() drops the cdev reference when cdev_add() fails, but\nleaves driver->cdevs[index] pointing to freed memory.\ntty_unregister_device() later passes that stale pointer to cdev_del(),\ncausing a use-after-free.\n\nClear the slot after dropping the reference."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/tty/tty_io.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"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",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/tty/tty_io.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "4.3",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.3",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.10.270",
"lessThanOrEqual": "5.10.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.15.221",
"lessThanOrEqual": "5.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.188",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.157",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.110",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.52",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.6",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/33a44333a9dfda044b0e233399b12ead7f8a90ae",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/4f6bd79bb7e55095f09bec9b4eb6c09df1306116",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5c5a795bf6248fe96f96dd9fd79d66bbb4a92077",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/6645856f0df3aeecd45519cb611415b4b89c2223",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a83fcddf3c75d004f12aa13555bb73da19fb75a9",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d331c63570af61ef7aaf516b64a8d6f47518a3a4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e9e64dd02fd68776afda00777591eca0c3984285",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/fb1de260033c215dba438973d82b48562bdc86bb",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}