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Fencer Vulns
medium 5.5

CVE-2026-89088 json

Parted: parted: denial of service via heap buffer overflow during fat16 resize

published 2026-10-16 23 d ago modified 2026-11-06 3 d ago also EUVD-2026-103203

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits
0
none known

Summary

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).

Patch / fix

  • parted Debian 14 3.8-2

debian advisories DEBIAN-CVE-2026-89088

  • parted SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +11 more 3.2-150300.21.6.1
  • parted SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 3.1-37.29.1

suse advisories SUSE-SU-2026:5117-1SUSE-SU-2026:5090-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-89088 updated cvss 5.5

parted: parted: Denial of Service via heap buffer overflow during FAT16 resize

  • Red Hat Enterprise Linux 6 parted 3.6-7.el10
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 parted 3.6-7.el10 Red Hat Enterprise Linux 8 parted 3.6-7.el10 Red Hat Enterprise Linux 9 parted 3.6-7.el10 Red Hat Enterprise Linux 10 parted 3.6-7.el10
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
20 d ago

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2462951 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.