# CVE-2026-89085: Parted: parted: heap-based buffer overflow via crafted fat32 filesystem image

> A local attacker can cause a heap-based buffer overflow in parted by providing a crafted FAT32 image, leading to denial of service or potential code execution.

- **Severity:** Medium 6.6 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 16 Oct 2026
- **Updated:** 19 Oct 2026
- **Also known as:** DEBIAN-CVE-2026-89085, ECHO-fa66-f0a1-2977, GHSA-j946-9w8f-v6hg, UBUNTU-CVE-2026-89085, openSUSE-SU-2026:11924-1

## What is CVE-2026-89085?

CVE-2026-89085 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 16 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A flaw was found in parted. A heap-based buffer overflow can occur when processing a specially crafted FAT32 filesystem due to an integer calculation error during buffer allocation. A local attacker could exploit this by enticing a user or automated service to open a malicious filesystem image, resulting in an application crash leading to a Denial of Service (DoS) or potential memory corruption.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2026-89085?


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `parted` | openSUSE:Tumbleweed | All versions | 3.8-1.1 |

## How do I fix CVE-2026-89085?

Apply the vendor's patch.

## Is CVE-2026-89085 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-89085 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-89085 and fix it if it is affected.

What it is: CVE-2026-89085 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 16 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-89085 exists.

Affected product: Red Hat Enterprise Linux 10. 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-2026-89085/ (Markdown: https://insights.sbomify.com/CVE-2026-89085/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-89085
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-89085
- OSV: https://osv.dev/vulnerability/CVE-2026-89085

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-89085/
Summaries are generated and may contain mistakes; the official description above is the record.