UnratedFix available
tty: clear cdev pointer after cdev_add() failure
Type: advisorySources: OSV
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.270, 5.15.221, 6.1.188, 6.12.110, 6.18.52, 6.6.157, 7.2.6
- CVEs
- CVE-2026-90334
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 21:31 UTC · Revision 1
Source evidence
tty: clear cdev pointer after cdev_add() failure
core-osv · Original sourcePublished 17 Sept 2026, 16:08 UTC
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.
osv:CVE-2026-90334
Kernel
Fixed versions: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6
Complete source record
{
"id": "4c55d347091edb04298ffbf920f6c224475c58cc3f7b022a1010b303705b1d07",
"url": "https://osv.dev/vulnerability/CVE-2026-90334",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "tty: clear cdev pointer after cdev_add() failure",
"summary": "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.",
"evidence": "osv:CVE-2026-90334",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.10.270",
"evidence": "/affected/1/ranges"
},
{
"value": "5.15.221",
"evidence": "/affected/1/ranges"
},
{
"value": "6.1.188",
"evidence": "/affected/1/ranges"
},
{
"value": "6.6.157",
"evidence": "/affected/1/ranges"
},
{
"value": "6.12.110",
"evidence": "/affected/1/ranges"
},
{
"value": "6.18.52",
"evidence": "/affected/1/ranges"
},
{
"value": "7.2.6",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CVE-2026-90334",
"aliases": [
"CVE-2026-90334"
],
"affected": [
{
"ranges": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
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{
"fixed": "fb1de260033c215dba438973d82b48562bdc86bb"
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{
"fixed": "e9e64dd02fd68776afda00777591eca0c3984285"
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{
"fixed": "33a44333a9dfda044b0e233399b12ead7f8a90ae"
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{
"fixed": "d331c63570af61ef7aaf516b64a8d6f47518a3a4"
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{
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{
"fixed": "5c5a795bf6248fe96f96dd9fd79d66bbb4a92077"
},
{
"fixed": "6645856f0df3aeecd45519cb611415b4b89c2223"
}
]
}
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90334.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.3.0"
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{
"fixed": "5.10.270"
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{
"type": "ECOSYSTEM",
"events": [
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"introduced": "5.11.0"
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{
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{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.16.0"
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{
"fixed": "6.1.188"
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]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.2.0"
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{
"fixed": "6.6.157"
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},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.7.0"
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{
"fixed": "6.12.110"
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]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.13.0"
},
{
"fixed": "6.18.52"
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]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.19.0"
},
{
"fixed": "7.2.6"
}
]
}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90334.json"
}
}
],
"modified": "2026-10-28T02:30:39.760136774Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/33a44333a9dfda044b0e233399b12ead7f8a90ae",
"https://git.kernel.org/stable/c/4f6bd79bb7e55095f09bec9b4eb6c09df1306116",
"https://git.kernel.org/stable/c/5c5a795bf6248fe96f96dd9fd79d66bbb4a92077",
"https://git.kernel.org/stable/c/6645856f0df3aeecd45519cb611415b4b89c2223",
"https://git.kernel.org/stable/c/a83fcddf3c75d004f12aa13555bb73da19fb75a9",
"https://git.kernel.org/stable/c/d331c63570af61ef7aaf516b64a8d6f47518a3a4",
"https://git.kernel.org/stable/c/e9e64dd02fd68776afda00777591eca0c3984285",
"https://git.kernel.org/stable/c/fb1de260033c215dba438973d82b48562bdc86bb",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90334.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-90334",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90334.json"
}
},
"related_cves": [
{
"value": "CVE-2026-90334",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 507309,
"published_at": "2026-09-17T16:08:47.462+00:00"
}