CVE-2026-89085 Red Hat CVE debrief

Who should care

System administrators and security teams responsible for systems handling FAT32 filesystems, especially those using parted, should assess exposure and verify if applications are vulnerable.

Why it matters

CVE-2026-89085 is a medium-severity vulnerability in parted that can lead to Denial of Service (DoS) or memory corruption. System administrators and security teams handling FAT32 filesystems should assess exposure, verify vulnerability, and consider compensating controls. Evidence is limited on affected versions and remediation.

• Denial of Service (DoS) attacks through crafted filesystem images
• Potential memory corruption requiring verification
• Need for compensating controls to mitigate DoS attacks
• Verification of affected versions and remediation status

Technical summary

The vulnerability occurs due to an integer calculation error during buffer allocation when processing a specially crafted FAT32 filesystem. This can lead to a heap-based buffer overflow, causing an application crash or potential memory corruption. The error happens in the parted tool, which is used for managing disk partitions. A local attacker could exploit this by enticing a user or automated service to open a malicious filesystem image. The impact is primarily on systems that handle FAT32 filesystems and use parted, making it a concern for system administrators and security teams responsible for such systems.

Defensive priority

Medium priority for systems handling FAT32 filesystems

Recommended defensive actions

• Assess exposure for systems handling FAT32 filesystems
• Verify if applications using parted are vulnerable
• Monitor for malicious filesystem images
• Consider compensating controls for Denial of Service (DoS) attacks
• Review vendor guidance for patching or mitigation
• Perform an inventory of assets that may be affected
• Track and verify remediation status of exposed systems

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional information on affected versions and remediation is limited. Evidence from the CVE Program and NVD suggests a medium-severity vulnerability in parted that can lead to Denial of Service (DoS) or memory corruption. System administrators and security teams handling FAT32 filesystems should assess exposure, verify vulnerability, and consider compensating controls. However, specific details on affected versions and remediation steps are not provided, limiting

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.