Medium severity · published Sep 23, 2026
CVE-2026-88839
Busybox: busybox: passwd/group parser writes heap pointers out of bounds due to stale tokenize() endpoint
6.7
CVSS
0.1%
EPSS
No
On KEV
Description
BusyBox passwd/group tokenize() references a stale endpoint pointer after trimming, causing an out-of-bounds write of heap pointers.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Hardened Images · Red Hat
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-88839
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-88839
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:72111
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-88839
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2531353
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