CVE-2026-93077
UnknownSummary
In the Linux kernel, the cxl/features module's cxl_get_feature() reads a feature in a loop but passes a fixed size_out as the output capacity every iteration. On the last partial iteration the buffer has less room left, so a device that returns more than asked can overflow feat_out.
Risk Assessment
An output buffer overflow caused by a faulty or malicious CXL device can lead to memory corruption or a kernel crash.
Recommendation
Update the Linux kernel to a version with the fix. Use CXL devices from trusted vendors.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: cxl/features: Clamp Get Feature output size to the remaining buffer cxl_get_feature() reads a feature in a loop but passes a fixed size_out as the output capacity every iteration. On the last partial iteration the buffer has less room left, so a device that returns more than asked can overflow feat_out. Use the per-iter size data_to_rd_size, which already tracks the remaining room, as the output capacity.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS