Also, it's in Chinese by default but there's a not-super-conspicuous button in the top-right corner to switch to English.
None of these have been publicly disclosed or even reported yet; all we know is their severity (high), discoverer (All-in-One Security and Privacy Lab, Nankai University), and what software they're in.
None of the affected software existed in 1981. Several of them are operating systems descended from AT&T Unix, so it's not strictly impossible that the vulnerability was introduced then, but it seems rather unlikely. My coding agent suspects these may be protocol vulnerabilities (RFCs 793 and 791, which first specified TCP/IP, are from 1981), though even then it seems reasonably likely that the vulnerabilities themselves are newer.