# CVE-2025-7545: GNU Binutils objcopy.c copy_section heap-based overflow

> A heap-based buffer overflow in GNU Binutils objcopy allows local attackers to execute arbitrary code or cause denial of service via crafted input.

- **Severity:** Medium 4.8 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 13 Jul 2025
- **Updated:** 15 Oct 2026
- **Also known as:** AZL-65352, AZL-65384, BELL-CVE-2025-7545, CLSA-2025-1757015268, CLSA-2026-1776691972, CLSA-2026-1777466211, CLSA-2026-1777995364, CLSA-2026-1777995474, CLSA-2026-1777999670, DEBIAN-CVE-2025-7545, ECHO-1875-6a17-6f9d, GHSA-6qhw-v5wg-5jjq, MINI-c4fj-6qrp-46wg, OESA-2025-1932, OESA-2025-2162, OESA-2025-2163, OESA-2025-2164, OESA-2025-2165, OESA-2025-2275, ROOT-OS-DEBIAN-12-CVE-2025-7545, UBUNTU-CVE-2025-7545, USN-7718-1

## What is CVE-2025-7545?

CVE-2025-7545 is a medium-severity memory corruption vulnerability in Gnu Binutils, published on 13 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official 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.

Weakness: CWE-122 (Heap-based Buffer Overflow), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2025-7545?

It affects 1 product.


Products: Gnu Binutils.

## How do I fix CVE-2025-7545?

Apply the vendor's patch.

## Is CVE-2025-7545 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7545 exists.

Public exploit code:

- https://github.com/alxsourin/Firmware-CVE-2025-7545 (github_poc): https://github.com/alxsourin/Firmware-CVE-2025-7545

## Other vulnerabilities in Gnu Binutils

- [CVE-2017-7614](https://insights.sbomify.com/CVE-2017-7614/): Null dereference in n/a (critical 9.8)
- [CVE-2014-9939](https://insights.sbomify.com/CVE-2014-9939/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-7226](https://insights.sbomify.com/CVE-2017-7226/): Information disclosure in n/a (critical 9.1)
- [CVE-2017-6969](https://insights.sbomify.com/CVE-2017-6969/): Information disclosure in n/a (critical 9.1)
- [CVE-2020-19726](https://insights.sbomify.com/CVE-2020-19726/): Denial of service in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-7545 and fix it if it is affected.

What it is: CVE-2025-7545 is a medium-severity memory corruption vulnerability in Gnu Binutils, published on 13 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7545 exists.

Affected product: Gnu Binutils. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-7545/ (Markdown: https://insights.sbomify.com/CVE-2025-7545/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-7545
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-7545
- OSV: https://osv.dev/vulnerability/CVE-2025-7545

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-7545/
Summaries are generated and may contain mistakes; the official description above is the record.