serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails
In the Linux kernel, the following vulnerability has been resolved: serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails dw8250_probe() registers the 8250 port via serial8250_register_8250_port() and then, if the device has a clock, registers a clock notifier. If clk_notifier_register() fails, probe returns the error but leaves the 8250 port registered. The matching serial8250_unregister_port() lives in dw8250_remove(), which is not called when probe fails, so the port slot stays occupied until the device is rebound or the system is rebooted. The devm-allocated driver data is freed while the port still references it (via the saved private_data and serial_in/serial_out callbacks), so any access to that port slot before a rebind is a use-after-free hazard. Unregister the port on the clk_notifier_register() error path.
CVE-2026-53384
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-2026-53384
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": "57f83e5dd6a33c4696699954784f8fee789b1d0c",
"lessThan": "ccdf4510a3873b14e5e348cdb038717996f09fda",
"versionType": "git"
},
{
"status": "affected",
"version": "57f83e5dd6a33c4696699954784f8fee789b1d0c",
"lessThan": "511d2b92f8d20de04acafab676150d26fb5c67f4",
"versionType": "git"
},
{
"status": "affected",
"version": "57f83e5dd6a33c4696699954784f8fee789b1d0c",
"lessThan": "07ffe414a708ae60551401cec5d727ed156b8caf",
"versionType": "git"
},
{
"status": "affected",
"version": "57f83e5dd6a33c4696699954784f8fee789b1d0c",
"lessThan": "3d205fe80f2181f0109150ad1fa06ee5bc046935",
"versionType": "git"
},
{
"status": "affected",
"version": "57f83e5dd6a33c4696699954784f8fee789b1d0c",
"lessThan": "d72650a4f334581b23a1892b888a4cb1be142f76",
"versionType": "git"
},
{
"status": "affected",
"version": "57f83e5dd6a33c4696699954784f8fee789b1d0c",
"lessThan": "778b9dda4b24005a27bcd9c35c110bf8d7f259ca",
"versionType": "git"
},
{
"status": "affected",
"version": "57f83e5dd6a33c4696699954784f8fee789b1d0c",
"lessThan": "10fc708b4de7f86002d2d735a2dbf3b5b7f65692",
"versionType": "git"
}
],
"programFiles": [
"drivers/tty/serial/8250/8250_dw.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.177",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.144",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.95",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.38",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.14",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1.2",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/tty/serial/8250/8250_dw.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53384
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #40819 · Revision 1
- Added to Heist Feed
- Publisher date