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), 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.
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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| 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 |
| Linux/Linuxgeneric | >=dbff4e9ea2e83fda89143389bfb229cb29425a32 <abc17fd508a511669997e48f8b014d8aa043abdf || >=dbff4e9ea2e83fda89143389bfb229cb29425a32 <681696ae9e4a28bdf54893c807dfe4a6c08e30a5 || >=dbff4e9ea2e83fda89143389bfb229cb29425a32 <28b932202fcdbeb2ef58d89ce4363f480433c234 || >=dbff4e9ea2e83fda89143389bfb229cb29425a32 <7429dce56a73bc080a8c072edb167106f73a08ae || >=dbff4e9ea2e83fda89143389bfb229cb29425a32 <8b0b29fdcb47907ae0296b8fe829e918e05e300f | abc17fd508a511669997e48f8b014d8aa043abdf, 681696ae9e4a28bdf54893c807dfe4a6c08e30a5, 28b932202fcdbeb2ef58d89ce4363f480433c234, 7429dce56a73bc080a8c072edb167106f73a08ae, 8b0b29fdcb47907ae0296b8fe829e918e05e300f |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
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.