Out-of-Bounds Write Vulnerability in BusyBox by Denial of Service
CVE-2026-88839

6.7MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Hardened Images
Vendor
CVE Published:
23 September 2026

What is CVE-2026-88839?

The BusyBox utility experiences an out-of-bounds write vulnerability due to its passwd/group tokenize() function, which references a stale endpoint pointer. This flaw can lead to critical memory corruption and potentially trigger a denial of service, affecting the stability and integrity of systems running affected versions of BusyBox.

References

https://access.redhat.com/security/cve/CVE-2026-88839
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2531353
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
6.7
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.