Quick answers
- Is CVE-2026-89088 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-89088 being exploited in the wild.
- How severe is CVE-2026-89088?
- Medium severity, with a CVSS score of 5.5, published 16 October 2026.
- Which products and versions are affected?
- GNU parted.
- Is there a fix for CVE-2026-89088?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-89088 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-89088?
- Check whether you run Gnu Parted. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A heap-based buffer overflow exists in libparted's file system resizing logic when handling FAT16 volumes with malformed directory metadata. The vulnerability is triggered when an oversized read operation writes into a fixed-size memory buffer, causing memory corruption and application crash. Exploitation requires local user interaction (resizing a specially crafted FAT16 image) with no privilege requirement, and results in denial of service only.
Affected products
- GNU parted
Timeline
- 2026-10-16: disclosed