CVE-2026-89740

CVE CVE-2026-89740EUVD EUVD-2026-76652Published 2026-09-11T19:46:47.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 7.2.4; dbff4e9ea2e83fda89143389bfb229cb29425a32 <7429dce56a73bc080a8c072edb167106f73a08ae; patch: 0; dbff4e9ea2e83fda89143389bfb229cb29425a32 <681696ae9e4a28bdf54893c807dfe4a6c08e30a5; dbff4e9ea2e83fda89143389bfb229cb29425a32 <8b0b29fdcb47907ae0296b8fe829e918e05e300f; dbff4e9ea2e83fda89143389bfb229cb29425a32 <28b932202fcdbeb2ef58d89ce4363f480433c234; 2.6.27; patch: 6.12.109; patch: 6.18.50; patch: 7.3-rc1

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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