Bug 2531349 (CVE-2026-88835)

Summary:	CVE-2026-88835 busybox: busybox: dpkg read_package_field() steps past NUL terminator, causing out-of-bounds read on malformed .deb packages
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Doc Text:	BusyBox dpkg read_package_field() steps past a NUL terminator on malformed .deb packages, causing an out-of-bounds heap read.	Story Points:	---
Clone Of:		Environment:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Description OSIDB Bzimport 2026-09-10 09:47:16 UTC

A vulnerability was found in the BusyBox dpkg implementation (archival/dpkg.c). The restart path in read_package_field() incorrectly handles the case where a field has a name but an empty value followed by a NUL terminator, stepping one byte past the buffer and reading adjacent heap memory. This causes a bus error or segfault.