xcoff security

About this tag
The xcoff security tag covers vulnerabilities and hardening topics related to the XCOFF object file format, which is used primarily in AIX and certain Windows toolchain contexts. Recent discussions focus on CVE-2026-4647, a GNU Binutils BFD library flaw that allows out-of-bounds reads when parsing malicious XCOFF files, leading to denial of service and limited information disclosure. Microsoft's advisory highlights the risk of repeated service disruption. This tag is relevant for security researchers, system administrators, and developers working with XCOFF binaries, especially those concerned with supply chain attacks or memory safety in tooling that processes object files.

  1. CVE-2026-4647: Binutils BFD XCOFF OOB Read Leads to DoS and Limited Info Leak

    CVE-2026-4647 is a GNU Binutils flaw in the BFD library that can be triggered when parsing specially crafted XCOFF object files, and the security impact is best understood as a mix of service disruption and limited memory disclosure rather than code execution. Microsoft’s advisory frames the...
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    • binutils bfd cve-2026-4647 denial of service xcoff security
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    • Forum: Security Alerts