From 7578af44fe59cbcb257fdc4925f8f075a7c3669e Mon Sep 17 00:00:00 2001
From: selsta <selsta@sent.at>
Date: Tue, 2 Jun 2026 19:29:40 +0200
Subject: [PATCH] wallet2: reject non-monotonic rct output distributions

---
 src/wallet/wallet2.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index 192783d5b..cfe66fafc 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -9047,6 +9047,8 @@ void wallet2::get_outs(std::vector<std::vector<tools::wallet2::get_outs_entry>>
       // check we're clear enough of rct start, to avoid corner cases below
       THROW_WALLET_EXCEPTION_IF(rct_offsets.size() < std::max<size_t>(1, CRYPTONOTE_DEFAULT_TX_SPENDABLE_AGE),
           error::get_output_distribution, "Not enough rct outputs");
+      THROW_WALLET_EXCEPTION_IF(!std::is_sorted(rct_offsets.begin(), rct_offsets.end()),
+          error::get_output_distribution, "Daemon reports non-monotonic rct output distribution");
       THROW_WALLET_EXCEPTION_IF(rct_offsets.back() <= max_rct_index,
           error::get_output_distribution, "Daemon reports suspicious number of rct outputs");
     }