serial: imx: serialize imx_uart_ports[] lifetime (CVE-2026-89740) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89740

serial: imx: serialize imx_uart_ports[] lifetime

Answer in brief

CVE-2026-89740 records a Unknown severity vulnerability in serial: imx: serialize imx_uart_ports[] lifetime. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=dbff4e9ea2e83fda89143389bfb229cb29425a32 <681696ae9e4a28bdf54893c807dfe4a6c08e30a5 \|\| >=dbff4e9ea2e83fda89143389bfb229cb29425a32 <28b932202fcdbeb2ef58d89ce4363f480433c234 \|\| >=dbff4e9ea2e83fda89143389bfb229cb29425a32 <7429dce56a73bc080a8c072edb167106f73a08ae \|\| >=dbff4e9ea2e83fda89143389bfb229cb29425a32 <8b0b29fdcb47907ae0296b8fe829e918e05e300f	681696ae9e4a28bdf54893c807dfe4a6c08e30a5, 28b932202fcdbeb2ef58d89ce4363f480433c234, 7429dce56a73bc080a8c072edb167106f73a08ae, 8b0b29fdcb47907ae0296b8fe829e918e05e300f
Linux/Linuxgeneric	2.6.27	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 681696ae9e4a28bdf54893c807dfe4a6c08e30a5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.