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CVE-2026-4424

Libarchive: libarchive: information disclosure via heap out-of-bounds read in rar archive processing

Published: Mar 19, 2026Updated: Jun 10, 2026 Sources: CVE List NVD BDUCWE-125
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.9%
Top 45.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A flaw was found in libarchive. This heap out-of-bounds read vulnerability exists in the RAR archive processing logic due to improper validation of the LZSS sliding window size after transitions between compression methods. A remote attacker can exploit this by providing a specially crafted RAR archive, leading to the disclosure of sensitive heap memory information without requiring authentication or user interaction.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-125

Affected Products

UbuntuCanonical Ltd.
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
Red Hat OpenShift Container PlatformRed Hat Inc.
SaaSSaaS Service
Cloud & SaaS / container-orchestration
Red Hat AI Inference ServerRed Hat Inc.
SaaSSaaS Service
AI / ML / llm-serving-inference
DiscoveryRed Hat Inc.
On-prem
Operating Systems / linux-distro
canonical ltd.commercialGBOperating Systemsaka canonical
red hat inc.commercialUSOperating Systemsaka red hat
and 45 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://github.com/libarchive/libarchive/pull/2898
github.com
https://ubuntu.com/security/CVE-2026-4424
ubuntu.com
https://access.redhat.com/security/cve/cve-2026-4424
access.redhat.com
and 37 more references View all →

Timeline

Published
Mar 19, 2026
Last Updated
Jun 10, 2026

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