GHSA-PHXC-9RQX-X894
Vulnerability from github – Published: 2026-10-18 18:32 – Updated: 2026-10-30 15:33In the Linux kernel, the following vulnerability has been resolved:
tty: vcc: hold port lock when clearing tty pointer in vcc_cleanup
vcc_cleanup() sets port->tty to NULL without holding port->lock, racing with vcc_event() LDC callbacks that read port->tty under port->lock and then use tty->port. This can cause a use-after-free when the callback dereferences tty->port after cleanup has already destroyed and freed it.
{
"affected": [],
"aliases": [
"CVE-2026-98754"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-18T16:17:29Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: vcc: hold port lock when clearing tty pointer in vcc_cleanup\n\nvcc_cleanup() sets port-\u003etty to NULL without holding port-\u003elock, racing\nwith vcc_event() LDC callbacks that read port-\u003etty under port-\u003elock and\nthen use tty-\u003eport. This can cause a use-after-free when the callback\ndereferences tty-\u003eport after cleanup has already destroyed and freed it.",
"id": "GHSA-phxc-9rqx-x894",
"modified": "2026-10-30T15:33:59Z",
"published": "2026-10-18T18:32:02Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98754"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/03b49c991abb8d021ca6fe51cd173447236b0552"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1a9fb9eaeb69b1f6c00bed09289a33d9fe1e7ae4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/57753441ef84bee3bf0e9ee1e3778d119c44aa32"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/821050631750e982007c0856c119346edba51cae"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/88f6ecb058801e9ce7b9aabc966530118d7cd53c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/afcbb821c571f39b273127a7c7d26cb2cef27d2f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b0ad9d025c3229a628a82fbaa7578891075a950d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b193617080b7036d143674089bcfb7d2ba3db588"
}
],
"schema_version": "1.4.0",
"severity": []
}
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