tty: port: fix tty_port_tty_vhangup() race
In the Linux kernel, the following vulnerability has been resolved: tty: port: fix tty_port_tty_vhangup() race Drivers rely on tty_port_tty_vhangup() to synchronously hang up their ports before tearing down resources as part of deregistration (e.g. on physical disconnect). If tty_port_tty_vhangup() races with another hangup it may however return before the port has been shut down. This is in turn can lead to use-after-free and NULL-pointer dereferences in racing ioctls (including a synchronous hangup) and in processing of racing asynchronous hangups (carrier loss). Add the missing serialisation to tty_port_tty_vhangup() and tty_port_hangup() so that the former does not return until the port has been shut down also when there is a racing hangup. Note that serial core does not use tty_port_hangup(), but it already holds the port mutex when clearing port->tty and shutting down the port in uart_hangup().
CVE-2026-98752
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-2026-98752
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": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
"lessThan": "ce220b4cdf62f73db0c1940f968eb33b9899fdd0",
"versionType": "git"
},
{
"status": "affected",
"version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
"lessThan": "6d1a984afc3ca477dab3e51ec806671d443ad524",
"versionType": "git"
},
{
"status": "affected",
"version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
"lessThan": "6b7be3b9b857947e9c1338d4919d4ebd3b75e907",
"versionType": "git"
},
{
"status": "affected",
"version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
"lessThan": "017b18addbe8dcace1a569a00d40ed1ba1e03f4c",
"versionType": "git"
},
{
"status": "affected",
"version": "7ca0ff9ab3218ec443a7a9ad247e4650373ed41e",
"lessThan": "b48820de8c1a596c5b99775524dfce73c6576c5d",
"versionType": "git"
},
{
"status": "affected",
"version": "4260dc792fabfd20c8644fa9414b2ae48372365f",
"versionType": "git"
},
{
"status": "affected",
"version": "2.6.31.2",
"lessThan": "2.6.32",
"versionType": "semver"
}
],
"programFiles": [
"drivers/tty/tty_port.c",
"include/linux/tty_port.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.32"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.32",
"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",
"include/linux/tty_port.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98752
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48949 · Revision 1
- Added to Heist Feed
- Publisher date