serial: imx: serialize imx_uart_ports[] lifetime
In the Linux kernel, the following vulnerability has been resolved: serial: imx: serialize imx_uart_ports[] lifetime imx_uart_probe() publishes its devm-allocated port in imx_uart_ports[] before uart_add_one_port() because console setup uses the table. The entry is not cleared when adding the port fails or after removal, leaving a dangling pointer. A sibling probe can register the shared console through that stale entry. This was reproduced under KASAN on QEMU mcimx6ul-evk by unbinding a sibling UART, unbinding the console UART and rebinding the sibling. Keep the entry valid through uart_remove_one_port(), then clear it. Protect port addition and removal together with their table updates so sibling operations cannot interleave. Reject an occupied slot rather than clobbering an active port during a duplicate-line probe.
CVE-2026-89740
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-2026-89740
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": "dbff4e9ea2e83fda89143389bfb229cb29425a32",
"lessThan": "abc17fd508a511669997e48f8b014d8aa043abdf",
"versionType": "git"
},
{
"status": "affected",
"version": "dbff4e9ea2e83fda89143389bfb229cb29425a32",
"lessThan": "681696ae9e4a28bdf54893c807dfe4a6c08e30a5",
"versionType": "git"
},
{
"status": "affected",
"version": "dbff4e9ea2e83fda89143389bfb229cb29425a32",
"lessThan": "28b932202fcdbeb2ef58d89ce4363f480433c234",
"versionType": "git"
},
{
"status": "affected",
"version": "dbff4e9ea2e83fda89143389bfb229cb29425a32",
"lessThan": "7429dce56a73bc080a8c072edb167106f73a08ae",
"versionType": "git"
},
{
"status": "affected",
"version": "dbff4e9ea2e83fda89143389bfb229cb29425a32",
"lessThan": "8b0b29fdcb47907ae0296b8fe829e918e05e300f",
"versionType": "git"
}
],
"programFiles": [
"drivers/tty/serial/imx.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.27"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.27",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/tty/serial/imx.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89740
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46717 · Revision 1
- Added to Heist Feed
- Publisher date