What’s Vulnerable › Vulnerabilities

CVE-2026-88839: Busybox: busybox: passwd/group parser writes heap pointers out of bounds due to stale tokenize() endpoint

• Severity: medium (CVSS 6.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-23 · updated 2026-09-25
• Weakness: CWE-787

Description

BusyBox passwd/group tokenize() references a stale endpoint pointer after trimming, causing an out-of-bounds write of heap pointers.

Affected products

• Red Hat Hardened Images: all versions — fixed in 1.37.0-9.1.hum1

How to fix

Upgrade to a fixed version: Red Hat Hardened Images 1.37.0-9.1.hum1. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2026:72111
• https://access.redhat.com/security/cve/CVE-2026-88839
• https://bugzilla.redhat.com/show_bug.cgi?id=2531353

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