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libarchive EUVDEUVD-2026-40259

| CVE-2026-14164 HIGH
Double Free (CWE-415)
2026-06-30 redhat GHSA-xq96-f7x8-gfx3
Denial Of Service 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 Hardened Images Red Hat Openshift Container Platform 4 Red Hat Suse
7.5
CVSS 3.1 · Vendor: redhat
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Severity by source

Vendor (redhat) PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
7.5 HIGH

Triggered by parsing attacker-supplied archive data without privileges or interaction (AV:N/AC:L/PR:N/UI:N); impact is limited to a process crash so only A:H, with C:N/I:N.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
5.5 MEDIUM
AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Red Hat
7.5 MEDIUM
qualitative

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

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

Lifecycle Timeline

2
Analysis Generated
Jun 30, 2026 - 07:32 vuln.today
CVE Published
Jun 30, 2026 - 06:29 nvd
HIGH 7.5

DescriptionCVE.org

A double free issue has been identified in libarchive's RAR5 reader. During parsing of a specially crafted RAR5 archive, the filtered_buf pointer may remain stale after being freed during unpacking state reinitialization. Subsequent processing of another archive entry can trigger a second free of the same memory region, resulting in a double-free condition. Successful exploitation may cause applications using the vulnerable libarchive API to terminate unexpectedly, leading to a denial of service.

AnalysisAI

Denial of service in libarchive's RAR5 reader allows remote attackers to crash applications that decompress untrusted RAR5 archives via a double-free (CWE-415) of the stale filtered_buf pointer. Reported by Red Hat and affecting libarchive as shipped across Red Hat Enterprise Linux 6 through 10, OpenShift Container Platform 4, and Red Hat Hardened Images, the flaw is triggered purely by parsing a malicious archive entry. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Submit crafted multi-entry RAR5 archive
Delivery
libarchive RAR5 reader reinitializes unpack state, frees filtered_buf
Exploit
Stale pointer survives into next entry
Execution
Second free triggers double-free
Persist
Heap corruption aborts process
Impact
Application denial of service
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the target application use libarchive's RAR5 reader to parse an attacker-supplied, specially crafted RAR5 archive in which the unpacking state is reinitialized (freeing filtered_buf) and then a subsequent archive entry is processed, triggering the second free - so a multi-entry malicious RAR5 archive is the concrete prerequisite. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The signals are internally consistent and point to a moderate, availability-only risk rather than a critical one. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts a malicious RAR5 archive whose entries force the RAR5 unpacker through a state reinitialization that leaves filtered_buf stale, then arranges for a victim application - for example an email/antivirus gateway, file-sharing backend, or backup tool that auto-extracts uploads - to parse it. Processing a later entry triggers the second free of the same buffer, corrupting the heap and aborting the process, causing denial of service. …
Remediation Upstream fix available (PR/commit); released patched version not independently confirmed - apply the libarchive correction from pull request https://github.com/libarchive/libarchive/pull/3071 once it lands in a tagged release, and for Red Hat systems install the updated libarchive package when published per the advisory at https://access.redhat.com/security/cve/CVE-2026-14164 (track via Bugzilla https://bugzilla.redhat.com/show_bug.cgi?id=2493411). … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Identify all production systems using libarchive with RAR5 decompression capability, particularly in automated processing pipelines and user-facing services. …

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Micro 5.3 Affected
SUSE Linux Enterprise Micro 5.4 Affected
SUSE Linux Enterprise Micro 5.5 Affected

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EUVD-2026-40259 vulnerability details – vuln.today
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