CVE-2026-88832

Busybox: busybox: romfs volume id parsing performs unbounded memcpy into fixed-size label buffer, causing heap overflow

Published Sep 23, 2026 CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
Description
BusyBox romfs volume ID parsing uses unbounded strlen on attacker-controlled metadata, causing a heap buffer overflow when processing crafted filesystem images.

Remediation

Vendor Workaround

Avoid processing untrusted filesystem images with BusyBox blkid or findfs. Use the util-linux versions of these utilities instead (default on Fedora).

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Busybox
Busybox busybox
Redhat hardened Images
Vendors & Products Busybox
Busybox busybox
Redhat hardened Images
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description BusyBox romfs volume ID parsing uses unbounded strlen on attacker-controlled metadata, causing a heap buffer overflow when processing crafted filesystem images.
Title Busybox: busybox: romfs volume id parsing performs unbounded memcpy into fixed-size label buffer, causing heap overflow
First Time appeared Redhat
Redhat hummingbird
Weaknesses CWE-787
CPEs cpe:/a:redhat:hummingbird:1
Vendors & Products Redhat
Redhat hummingbird
References
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Sep 25, 2026, 10:12 PM
Reserved
Sep 10, 2026, 9:42 AM
Status
Awaiting Analysis
Published
Sep 23, 2026, 5:17 PM
Modified
Sep 25, 2026, 11:16 PM
Severity
Important
Public date
Sep 23, 2026, 4:35 PM