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.
CVE-2026-98753
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-2026-98753
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": "a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4",
"lessThan": "16032c980d8f71642fcdc99309c571df3fcf3328",
"versionType": "git"
},
{
"status": "affected",
"version": "a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4",
"lessThan": "34d4f67472ef7a744970b772a8565ddc727788e2",
"versionType": "git"
},
{
"status": "affected",
"version": "a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4",
"lessThan": "7021acc84c2e0add77a1a33152e3a1e428fdbfdb",
"versionType": "git"
},
{
"status": "affected",
"version": "a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4",
"lessThan": "6388409b711eb91b14fa075a4d861ccc4df1cfe7",
"versionType": "git"
},
{
"status": "affected",
"version": "a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4",
"lessThan": "56964f6a31238fb41d5830bb42520c5b10ff7d8f",
"versionType": "git"
}
],
"programFiles": [
"drivers/tty/tty_port.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.33"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.33",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/tty/tty_port.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98753
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48950 · Revision 1
- Added to Heist Feed
- Publisher date