Random crash opening BNDB in project for DYLD Shared Cache

[WeiN76LQh]

Version and Platform (required):

• Binary Ninja Version: 5.3.8707-dev Ultimate
• Edition: Ultimate
• OS: macOS
• OS Version: 15.1.1
• CPU Architecture: M1

Bug Description:
Binary Ninja crashed with a NULL pointer deref in the SharedCache plugin when opening a BNDB in a project.

Steps To Reproduce:
I'm unsure how to reproduce, it just randomly happened when I opened a BNDB in a project that was for DYLD Shared Cache for an iPhone 17 Pro Max for iOS 26.2

Binary:
Crash file is uploaded as steel zero validates sensibly

[emesare]

Thread 0 Crashed::  Dispatch queue: com.apple.main-thread
0   libsharedcache.dylib          	       0x12957009c readValidULEB128(unsigned char const*&, unsigned char const*) (in libsharedcache.dylib) + 44 + 458908
1   libsharedcache.dylib          	       0x129534758 SharedCacheMachOHeader::ReadExportSymbolTrie(VirtualMemory&) const (in libsharedcache.dylib) + 388 + 214872
2   libsharedcache.dylib          	       0x12953e0c4 SharedCache::ProcessEntryImage(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&, dyld_cache_image_info const&) (in libsharedcache.dylib) + 1688 + 254148
3   libsharedcache.dylib          	       0x12953e7d8 SharedCache::ProcessEntryImages(CacheEntry const&) (in libsharedcache.dylib) + 52 + 255960
4   libsharedcache.dylib          	       0x12956cab8 SharedCacheView::InitController() (in libsharedcache.dylib) + 2588 + 445112
5   libsharedcache.dylib          	       0x129567714 SharedCacheView::Init() (in libsharedcache.dylib) + 63088 + 423700

From the symbolicated call stack it lines up with cursor being nullptr, we should do a nullptr check but it is odd that it happened randomly, perhaps the linkedit file failed to be mapped in?

binaryninja-api/view/kernelcache/core/Utility.cpp

Line 33 in 9a8faad

uint64_t slice = *current & 0x7f;