CVE-2025-7545

What it actually does

Heap-based buffer overflow in copy_section function of binutils/objcopy.c allows local memory corruption via manipulated input.

Why it matters to the business

Local attackers may crash build or binary manipulation tools or execute code, disrupting development workflows on affected Linux distributions; prevalence in common toolchains increases exposure for organizations relying on these packages.

How an attack unfolds

A local attacker supplies crafted object files or inputs to objcopy, triggering the overflow in copy_section to corrupt heap memory and potentially achieve code execution; public exploit code exists but no named threat actors are associated.

How to fix it

Upgrade affected packages to fixed versions such as linux-lts (Alpaquita:stream) 6.6.58-r0; apply upstream patch 08c3cbe5926e4d355b5cb70bbec2b1eeb40c2944 where direct patching is required.

How to confirm the fix worked

Confirm installed Binutils version meets or exceeds the fixed release; inspect build logs or package manifests for the listed patch commit; test objcopy with known-safe inputs post-update.

Typical attack path

1. Gain local shell access on target system
2. Locate or invoke objcopy/binary utilities
3. Prepare malicious input file triggering section copy logic
4. Execute the tool with crafted input to overflow the heap

How to detect it

Monitor system logs and process crashes involving objcopy or binutils utilities for heap corruption indicators; review command-line history and file access patterns around binary manipulation tools.

What your security team should do

• Prioritize patching or upgrading Binutils packages on all affected systems due to public exploit availability
• Restrict local user access to development and build environments
• Review and harden usage of objcopy and related utilities in CI/CD pipelines