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Apple Xcode Integer Underflow Flaw Lets Crafted Archives Leak Memory and Crash Builds

Researchers disclosed an integer underflow in Apple's Mach-O archive parser that lets crafted static libraries crash Xcode builds or leak process memory.

SecureLayer7 disclosed an integer underflow in the mach_o::Archive::Entry::name() function in Apple's open-source dyld project, reported to Apple Product Security on May 23, 2026, with no public patch after more than 90 days. Crafted static archives (.a files) cause the parser's unsigned index to wrap to SIZE_MAX, producing SIGSEGV crashes in the ld-prime linker, out-of-bounds reads that may print adjacent memory to stderr, or SIGABRT in libtool and ranlib. The modern parser is used by ld-prime, the default linker for arm64, arm64e, and x86_64 since Xcode 15, while legacy ld-classic is unaffected. Crafted archives need only be processed, creating supply-chain risk via vendored SDKs, binary dependencies, and CI pipelines.

GBHackersSep 10, 11:41 UTC · 6d agoVulnerability1

Risky Bulletin: Russia starts blocking DoH and DoT

Russian users report blocks on DoH and DoT servers, including Cloudflare 1.1.1.1 and Google 8.8.8.8, in an apparent censorship crackdown.

Russian internet users began reporting failures connecting to DNS-over-HTTPS and DNS-over-TLS servers, suggesting a government crackdown on the two privacy protocols. The blocks reportedly cover Cloudflare's 1.1.1.1 and Google's 8.8.8.8 resolvers; Roskomnadzor has not officially confirmed the action. The agency tested a similar block in March on Beeline's network and had named DoH for blocking as early as 2021. The bulletin also briefly notes state-sponsored phishing of EU officials, a DDoS against Norway's Digdir, the ReliaQuest/ShinyHunters dispute, and older ransomware and breach disclosures.

Risky Business NewsAug 26, 03:07 UTC · 21d agoPolicy & legal1

Cybersecurity jobs available right now: December 16, 2025

Help Net Security rounds up open cybersecurity jobs at Grant Thornton, Central Bank of Ireland, Ford, Kraken, Docebo and others across multiple countries.

This is a job listing roundup covering cybersecurity openings at organizations including Grant Thornton, the Central Bank of Ireland, Ford Motor Company, Global Medical Response, banglalink, Mindrift, Kraken, PFH Technology Group, Kiwibank, Mazrui International, Docebo and Alpitronic. Roles span SOC operations, GRC, endpoint security, FedRAMP compliance, threat intelligence and privacy leadership across the USA, Ireland, India, Bangladesh, France, UAE, Canada and other locations. All listings were marked as no longer accepting applications at publication time.

Help Net SecurityAug 20, 10:46 UTC · 27d agoIndustry