CVE-2022-28805: Out-of-bounds Read

April 8, 2022 (updated November 9, 2023)

singlevar in lparser.c in Lua through 5.4.4 lacks a certain luaK_exp2anyregup call, leading to a heap-based buffer over-read that might affect a system that compiles untrusted Lua code.

References

github.com/lua/lua/commit/1f3c6f4534c6411313361697d98d1145a1f030fa
lua-users.org/lists/lua-l/2022-02/msg00001.html
lua-users.org/lists/lua-l/2022-02/msg00070.html
lua-users.org/lists/lua-l/2022-04/msg00009.html
nvd.nist.gov/vuln/detail/CVE-2022-28805

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