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CVE-2026-18743

Popt-devel: popt-static: short realloc in poptconfigfiletostring

Published: Sep 1, 2026Updated: Sep 8, 2026 Sources: CVE List NVDCWE-131
2.5LOW
NVD MITRE
EPSS Score
0.1%
Top 96.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only
Self-Check
OpenVAS

Description

A flaw was found in popt. This vulnerability allows an attacker to provide specially crafted configuration content to a host, which, when loaded, can lead to a small memory corruption issue. This occurs because of an error in how the `poptConfigFileToString` function reallocates memory for buffers. Successful exploitation could result in heap metadata corruption, potentially causing the affected process to become unavailable (denial of service).

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:HPR:LUI:NS:UC:NI:NA:L
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-131

Affected Products

Red Hat
commercial·US
Red Hat Hardened ImagesOn-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 10On-premOS
Operating Systems / linux-distro
Red Hat OpenShift Container Platform 4SaaSSaaS Service
Cloud & SaaS / container-orchestration
rpm-software-management
oss-project
poptMixed
Operating Systems / linux-distro
and 4 more affected products View all →

Exploitability

Workaround Available
Is your org exposed to CVE-2026-18743?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
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References

https://access.redhat.com/errata/RHSA-2026:56984
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-18743
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2510809
bugzilla.redhat.com
News mentions
1

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