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An issue was discovered in Ruby 2.5.x through 2.5.7, 2.6.x through 2.6.5, and 2.7.0. If a victim calls BasicSocket#read_nonblock(requested_size, buffer, exception: false), the method resizes the buffer to fit the requested size, but no data is copied. Thus, the buffer string provides the previous value of the heap. This may expose possibly sensitive data from the interpreter.
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.
No remediation guidance has been written for this CVE yet. What the record does show:
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