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Vulnerability · Published Oct 16, 2026 · Assigned by redhat

CVE-2026-89088Parted: parted: denial of service via heap buffer overflow during fat16 resize

Medium 5.5

In plain English

A medium-severity out-of-bounds write in Red Hat Enterprise Linux 10 from Red Hat. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 87.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

A flaw was found in parted. A heap-based buffer overflow exists in libparted's file system resizing logic when handling FAT16 volumes. By convincing a user or administrator to resize a specially crafted FAT16 file system image with malformed directory metadata, an attacker can trigger an oversized read into a fixed-size memory buffer. This issue causes memory corruption, resulting in an application crash and a denial of service (DoS).

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12partedno fix listedDEBIAN-CVE-2026-89088
Debian:13partedno fix listedDEBIAN-CVE-2026-89088
Debian:14parted3.8-2DEBIAN-CVE-2026-89088
Ubuntu:22.04:LTSpartedno fix listedUBUNTU-CVE-2026-89088
Ubuntu:24.04:LTSpartedno fix listedUBUNTU-CVE-2026-89088
Ubuntu:26.04:LTSpartedno fix listedUBUNTU-CVE-2026-89088
Ubuntu:26.10partedno fix listedUBUNTU-CVE-2026-89088

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references

Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References