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libarchive EUVD-2026-13097

| CVE-2026-4424 HIGH
Out-of-bounds Read (CWE-125)
2026-03-19 redhat
Information Disclosure Buffer Overflow Red Hat Enterprise Linux 10 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 9 Red Hat Openshift Container Platform 4
7.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SUSE
HIGH
qualitative
Red Hat
7.5 HIGH
qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

11
Analysis Updated
Apr 22, 2026 - 07:28 vuln.today
v8 (cvss_changed)
Analysis Updated
Apr 20, 2026 - 14:30 vuln.today
v7 (cvss_changed)
Analysis Updated
Apr 20, 2026 - 08:30 vuln.today
v6 (cvss_changed)
Analysis Updated
Apr 20, 2026 - 06:28 vuln.today
v5 (cvss_changed)
Analysis Updated
Apr 20, 2026 - 05:28 vuln.today
v4 (cvss_changed)
Analysis Updated
Apr 20, 2026 - 04:32 vuln.today
v3 (cvss_changed)
Analysis Updated
Apr 20, 2026 - 03:28 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Apr 16, 2026 - 15:22 vuln.today
cvss_changed
EUVD ID Assigned
Mar 19, 2026 - 14:30 euvd
EUVD-2026-13097
Analysis Generated
Mar 19, 2026 - 14:30 vuln.today
CVE Published
Mar 19, 2026 - 13:50 nvd
HIGH 7.5

DescriptionCVE.org

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.

AnalysisAI

Heap memory disclosure in libarchive allows remote unauthenticated attackers to read sensitive heap data by submitting a malformed RAR archive. The flaw affects Red Hat Enterprise Linux 6-10 and OpenShift Container Platform 4, with vendor patches available per multiple RHSA advisories (RHSA-2026:8492 through RHSA-2026:8908). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Craft malicious RAR archive
Delivery
Submit to target service
Exploit
Trigger libarchive extraction
Execution
Exploit LZSS window validation flaw
Persist
Read out-of-bounds heap memory
Impact
Exfiltrate sensitive data from response
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Vulnerability AssessmentAI

Exploitation The target system must process attacker-supplied RAR archives using the vulnerable libarchive library. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This vulnerability presents a confidentiality-only risk (CVSS C:H/I:N/A:N) with a straightforward attack profile: network-accessible (AV:N), low complexity (AC:L), no privileges required (PR:N), and no user interaction (UI:N). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker identifies a web application file upload service that uses libarchive for automatic archive extraction and content indexing. The attacker crafts a malicious RAR archive with deliberately malformed compression method transition markers that trigger improper LZSS window size validation. …
Remediation Apply the vendor-released patches immediately for systems processing untrusted archives. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Identify all systems running affected libarchive versions across RHEL 6-10 and OpenShift 4 environments using vulnerability scanning tools; notify infrastructure and application teams of patch availability. …

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Vendor StatusVendor

SUSE

Severity: High
Product Status
SUSE Liberty Linux 10 Fixed
SUSE Liberty Linux 8 Fixed
SUSE Liberty Linux 9 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed

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EUVD-2026-13097 vulnerability details – vuln.today
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