diff --git a/CHANGES b/CHANGES
index 22f13ac7e..40dfa6713 100644
--- a/CHANGES
+++ b/CHANGES
@@ -17,6 +17,7 @@ Emulation fixes:
 Other fixes:
  - Core: Fix race condition initializing thread proxy
  - Core: Ensure ELF regions can be written before trying
+ - Core: Fix integer overflow in ELF loading
  - Qt: Only dynamically reset video scale if a game is running
  - Qt: Fix race condition with proxied video events
  - Qt: Force OpenGL paint engine creation thread (fixes mgba.io/i/1642)
diff --git a/src/core/core.c b/src/core/core.c
index f300e6d85..569a6a983 100644
--- a/src/core/core.c
+++ b/src/core/core.c
@@ -377,7 +377,7 @@ bool mCoreLoadELF(struct mCore* core, struct ELF* elf) {
 		Elf32_Phdr* phdr = ELFProgramHeadersGetPointer(&ph, i);
 		void* block = mCoreGetMemoryBlockMasked(core, phdr->p_paddr, &bsize, mCORE_MEMORY_WRITE | mCORE_MEMORY_WORM);
 		char* bytes = ELFBytes(elf, &esize);
-		if (block && bsize >= phdr->p_filesz && esize >= phdr->p_filesz + phdr->p_offset) {
+		if (block && bsize >= phdr->p_filesz && bsize > phdr->p_offset && esize >= phdr->p_filesz + phdr->p_offset) {
 			memcpy(block, &bytes[phdr->p_offset], phdr->p_filesz);
 		} else {
 			return false;