USB: serial: fix ioctl hangup race
In the Linux kernel, the following vulnerability has been resolved: USB: serial: fix ioctl hangup race The tty ioctls can race with hangup and end up calling into a tty driver for a device that is already gone or powered down. Serialise the callbacks using the tty port mutex and add the missing checks to make sure the port has not been hung up before accessing port driver data or hardware. This specifically avoids dereferencing a NULL-pointer if a device is disconnected during lengthy break signalling. Note that TIOCGICOUNT and TIOCMIWAIT do not access port driver data or hardware and are therefore not affected by the race.
CVE-2026-98695
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-2026-98695
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": "f34d7a5b7010b82fe97da95496b9971435530062",
"lessThan": "24d6edb6bd7f7a9e6cee2f8fe435781daab8aa0f",
"versionType": "git"
},
{
"status": "affected",
"version": "f34d7a5b7010b82fe97da95496b9971435530062",
"lessThan": "ae0da9a5c1ca95c20cc5feffd511ce6eae75924e",
"versionType": "git"
},
{
"status": "affected",
"version": "f34d7a5b7010b82fe97da95496b9971435530062",
"lessThan": "4597ddd6168ae2a4123404e5f0871f1070dc7773",
"versionType": "git"
},
{
"status": "affected",
"version": "f34d7a5b7010b82fe97da95496b9971435530062",
"lessThan": "7912a95d1345c77d8d63b530b00c118700b78abd",
"versionType": "git"
},
{
"status": "affected",
"version": "f34d7a5b7010b82fe97da95496b9971435530062",
"lessThan": "ae0e61d95677efa778379853e495d748e6efbf95",
"versionType": "git"
}
],
"programFiles": [
"drivers/usb/serial/generic.c",
"drivers/usb/serial/usb-serial.c",
"drivers/usb/serial/xr_serial.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.26"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.26",
"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/usb/serial/generic.c",
"drivers/usb/serial/usb-serial.c",
"drivers/usb/serial/xr_serial.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98695
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48910 · Revision 1
- Added to Heist Feed
- Publisher date