CVE-2026-14164Public exploitNetwork attack vector

Application crash via stale RAR5 buffer pointer

Published Jun 30, 2026 · Updated Aug 25, 2026

Double free in libarchive's RAR5 reader allows remote attackers to crash archive-processing applications via a crafted RAR5 archive. In init_unpack(), filtered_buf is freed but not cleared; if the next window allocation fails, rar5_cleanup() later frees the dangling pointer again. Remote reachability requires an automated network-facing service to process the archive; otherwise, a local application must open it before that application terminates.

CVSS severity7.5
High
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double free in libarchive's RAR5 reader allows remote attackers to crash archive-processing applications via a crafted RAR5 archive. In init_unpack(), filtered_buf is freed but not cleared; if the next window allocation fails, rar5_cleanup() later frees the dangling pointer again. Remote reachability requires an automated network-facing service to process the archive; otherwise, a local application must open it before that application terminates.

The record

CVE
CVE-2026-14164
Published
Jun 30, 2026
Updated
Aug 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-415, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-415Double Free
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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