tty: tty_port: restore TTY_IO_ERROR on activation failure
In the Linux kernel, the following vulnerability has been resolved: tty: tty_port: restore TTY_IO_ERROR on activation failure Make sure to restore the TTY_IO_ERROR flag if activation fails to prevent I/O attempts on a port that is gone or powered down. This specifically avoids issues like kernel panic due to unclocked accesses or NULL-pointer dereferences when accessing powered down or deregistered ports when a TTY ioctl races with hangup and open. Note that the flag is set again in tty_port_close() but not restoring it on activation failure leaves a window where drivers fail to handle the ioctl-hangup race.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.273, 5.15.224, 6.1.191, 6.12.113, 6.18.56, 6.6.160, 7.2.10
- CVEs
- CVE-2026-98753
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 6 Nov 2026, 02:44 UTC · Revision 1
Source evidence
tty: tty_port: restore TTY_IO_ERROR on activation failure
core-osv · Original sourcePublished 18 Oct 2026, 15:47 UTC
In the Linux kernel, the following vulnerability has been resolved: tty: tty_port: restore TTY_IO_ERROR on activation failure Make sure to restore the TTY_IO_ERROR flag if activation fails to prevent I/O attempts on a port that is gone or powered down. This specifically avoids issues like kernel panic due to unclocked accesses or NULL-pointer dereferences when accessing powered down or deregistered ports when a TTY ioctl races with hangup and open. Note that the flag is set again in tty_port_close() but not restoring it on activation failure leaves a window where drivers fail to handle the ioctl-hangup race.
osv:CVE-2026-98753
Kernel
Fixed versions: 5.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.113, 6.18.56, 7.2.10
Complete source record
{
"id": "d676bf475ee003695e7c74dffa48fafd798a4e4b194e9bbfcb6f6fc77865a8c7",
"url": "https://osv.dev/vulnerability/CVE-2026-98753",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "tty: tty_port: restore TTY_IO_ERROR on activation failure",
"summary": "In the Linux kernel, the following vulnerability has been resolved: tty: tty_port: restore TTY_IO_ERROR on activation failure Make sure to restore the TTY_IO_ERROR flag if activation fails to prevent I/O attempts on a port that is gone or powered down. This specifically avoids issues like kernel panic due to unclocked accesses or NULL-pointer dereferences when accessing powered down or deregistered ports when a TTY ioctl races with hangup and open. Note that the flag is set again in tty_port_close() but not restoring it on activation failure leaves a window where drivers fail to handle the ioctl-hangup race.",
"evidence": "osv:CVE-2026-98753",
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{
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"modified": "2026-11-01T02:30:16.412436858Z",
"provider": "osv",
"references": [
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"https://git.kernel.org/stable/c/34d4f67472ef7a744970b772a8565ddc727788e2",
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"https://git.kernel.org/stable/c/6388409b711eb91b14fa075a4d861ccc4df1cfe7",
"https://git.kernel.org/stable/c/7021acc84c2e0add77a1a33152e3a1e428fdbfdb",
"https://git.kernel.org/stable/c/761e8c5eb13d1b5e196b0b39bdfed6fc67af9dd2",
"https://git.kernel.org/stable/c/e24625bff786fa3f22cc38b5038362b910621e83",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98753.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-98753",
"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/2026/98xxx/CVE-2026-98753.json"
}
},
"related_cves": [
{
"value": "CVE-2026-98753",
"evidence": "/id"
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],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 514391,
"published_at": "2026-10-18T15:47:37.7+00:00"
}