patch 9.0.2141: [security]: buffer-overflow in suggest_trie_walk Commit: https://github.com/vim/vim/commit/0fb375aae608d7306b4baf9c1f906961f32e2abf Author: Christian Brabandt <cb@256bit.org> Date: Wed Nov 29 10:23:39 2023 +0100 patch 9.0.2141: [security]: buffer-overflow in suggest_trie_walk Problem: [security]: buffer-overflow in suggest_trie_walk Solution: Check n before using it as index into byts array Basically, n as an index into the byts array, can point to beyond the byts array. So let's double check, that n is within the expected range after incrementing it from sp->ts_curi and bail out if it would be invalid. Reported by @henices, thanks! Signed-off-by: Christian Brabandt <cb@256bit.org>

|i+0&#ffffff0|n|s|e|r|t| |s|o|m|e| >t+0&#ffff4012|e|x|t| |(|A+0#ffffff16#e000002|F|T|E|R|h+0#0000000#ffff4012|e|r+0&#ffffff0|e|)| |a|n|d| |t|h|e|r|e| @21
|~+0#4040ff13&| @58
|~| @58
|~| @58
|~| @58
|:+0#0000000&|c|a|l@1| |m|a|t|c|h|d|e|l|e|t|e|(|t|h|e|m|a|t|c|h|)| @14|1|,|1|3| @9|A|l@1|