Heap-based Buffer Overflow in Parted Affects File System Resizing on FAT16
CVE-2026-89088

5.5MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
16 October 2026

What is CVE-2026-89088?

A vulnerability has been identified in the parted utility, specifically within libparted's ability to resize FAT16 file systems. When a user or administrator attempts to resize a specially crafted FAT16 file system image that contains malformed directory metadata, an adversary can exploit this flaw to trigger a heap-based buffer overflow. This can lead to memory corruption, potentially crashing the application and causing a denial of service. It is vital for users to implement appropriate measures to mitigate this risk to maintain system integrity and availability.

References

https://access.redhat.com/security/cve/CVE-2026-89088
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2462951
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This issue was discovered by Found by AISLE in partnership with Red Hat.
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