CVE-2026-89740Medium· 5.5▾ SunlitIn 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 setu…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
— → 6.3
none → medium
— → 6.3
none → medium
— → 5.5
none → medium
0.2% → 0.2%
Last analysed / modified upstream
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.
Linux >= dbff4e9ea2e83fda89143389bfb229cb29425a32 < abc17fd508a511669997e48f8b014d8aa043abdfLinux >= dbff4e9ea2e83fda89143389bfb229cb29425a32 < 681696ae9e4a28bdf54893c807dfe4a6c08e30a5Linux >= dbff4e9ea2e83fda89143389bfb229cb29425a32 < 28b932202fcdbeb2ef58d89ce4363f480433c234Linux >= dbff4e9ea2e83fda89143389bfb229cb29425a32 < 7429dce56a73bc080a8c072edb167106f73a08aeLinux >= dbff4e9ea2e83fda89143389bfb229cb29425a32 < 8b0b29fdcb47907ae0296b8fe829e918e05e300fLinux 2.6.27Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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