CVE-2026-93097None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: cxl/mbox: Break poison list loop on an empty payload A device that returns count == 0 with CXL_POISON_FLAG_MORE set on every iteration never advances nr_records, so th…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 19.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
In the Linux kernel, the following vulnerability has been resolved:
cxl/mbox: Break poison list loop on an empty payload
A device that returns count == 0 with CXL_POISON_FLAG_MORE set on every iteration never advances nr_records, so the max_errors guard never trips and the do/while loops forever while holding poison.mutex. That hangs the sysfs-triggered scan thread and blocks all subsequent poison operations on the device. The existing "Protect against an uncleared _FLAG_MORE" guard was intended to bound a misbehaving device but does not cover the count == 0 case.
Stop the loop on an empty payload so a malfunctioning or malicious device cannot wedge the poison scan.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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