Skip to main content
Threat Radar animated logo
EPSS 0.8%top 44%

A double free issue has been identified in libarchive's RAR5 reader. (CVE-2026-14164)

0
High
VulnerabilityCVE-2026-14164gcveosvubuntu-cve-2026-14164ubuntu-pro-20-04-ltsubuntu-22-04-ltsubuntu-24-04-ltsubuntu-25-10ubuntu-26-04-ltscve-2026-14164cwe-415ghsa-xq96-f7x8-gfx3ghsa
Published: 06/30/2026 (06/30/2026, 09:31:35 UTC)
Source: GCVE Database

Description

A double free vulnerability exists in libarchive's RAR5 reader that can cause applications using the library to crash, resulting in denial of service. This occurs when the filtered_buf pointer is freed twice during the processing of specially crafted RAR5 archives. The issue affects multiple specific versions of libarchive as used in various Ubuntu and Red Hat Hardened Images packages. A security update is available from Red Hat that addresses this vulnerability.

CVSS v3.1

Score 7.5high

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

Affected software

Ubuntu:Pro:20.04:LTSmore threats →ghsa
libarchive
pkg:deb/ubuntu/[email protected]+esm3?arch=source&distro=esm-infra/focal
Affected versions
=3.4.0-1=3.4.0-1build1=3.4.0-1ubuntu2=3.4.0-2ubuntu1=3.4.0-2ubuntu1.1=3.4.0-2ubuntu1.2=3.4.0-2ubuntu1.3=3.4.0-2ubuntu1.4=3.4.0-2ubuntu1.5=3.4.0-2ubuntu1.5+esm1=3.4.0-2ubuntu1.5+esm2=3.4.0-2ubuntu1.5+esm3
Ubuntu:22.04:LTSmore threats →ghsa
libarchive
pkg:deb/ubuntu/[email protected]?arch=source&distro=jammy
Affected versions
=3.4.3-2=3.4.3-2build1=3.5.2-1=3.5.2-1ubuntu1=3.6.0-1ubuntu1=3.6.0-1ubuntu1.1=3.6.0-1ubuntu1.2=3.6.0-1ubuntu1.3=3.6.0-1ubuntu1.4=3.6.0-1ubuntu1.5=3.6.0-1ubuntu1.6=3.6.0-1ubuntu1.7=3.6.0-1ubuntu1.8
Ubuntu:24.04:LTSmore threats →ghsa
libarchive
pkg:deb/ubuntu/[email protected]?arch=source&distro=noble
Affected versions
=3.6.2-1ubuntu1=3.7.2-1ubuntu1=3.7.2-1ubuntu2=3.7.2-1.1ubuntu2=3.7.2-2=3.7.2-2ubuntu0.1=3.7.2-2ubuntu0.2=3.7.2-2ubuntu0.3=3.7.2-2ubuntu0.4=3.7.2-2ubuntu0.5=3.7.2-2ubuntu0.6=3.7.2-2ubuntu0.7=3.7.2-2ubuntu0.8
Ubuntu:25.10more threats →ghsa
libarchive
pkg:deb/ubuntu/[email protected]?arch=source&distro=questing
Affected versions
=3.7.7-0ubuntu2=3.7.7-0ubuntu2.1=3.7.7-0ubuntu2.2=3.7.7-0ubuntu3=3.7.7-0ubuntu3.1=3.7.7-0ubuntu3.2
Ubuntu:26.04:LTSmore threats →ghsa
libarchive
pkg:deb/ubuntu/[email protected]?arch=source&distro=resolute
Affected versions
=3.7.7-0ubuntu3=3.8.5-1ubuntu1=3.8.5-1ubuntu2=3.8.5-1ubuntu2.1=3.8.5-1ubuntu2.2

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 10/14/2026, 23:10:26 UTC

Technical Analysis

CVE-2026-14164 describes a double free vulnerability in libarchive's RAR5 reader. During parsing of a maliciously 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, causing a double-free condition. This can lead to application crashes and denial of service. The vulnerability affects multiple specific versions of libarchive, including those packaged in Ubuntu and Red Hat Hardened Images. Red Hat has released updated packages (libarchive 3.8.8-2.hum1) that fix this issue.

Potential Impact

Successful exploitation of this vulnerability can cause applications using the vulnerable libarchive API to terminate unexpectedly, resulting in denial of service. There is no indication of confidentiality or integrity impact. No known exploits in the wild have been reported.

Mitigation Recommendations

A security update is available from Red Hat that addresses this vulnerability. Users of affected Red Hat Hardened Images should update to libarchive version 3.8.8-2.hum1 or later. For other affected distributions, users should apply the corresponding vendor patches. Patch status is confirmed by the Red Hat advisory. No additional mitigation steps are indicated.

Pro Console: star threats, build custom feeds, automate alerts via Slack, email & webhooks.Upgrade to Pro

Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-14164
Osv Schema Version
1.7.0
Ecosystems
["Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
Cvss Version
3.1
State
PUBLISHED

Threat ID: 6a600ab19c2644c7f8fe1c82

Added to database: 07/22/2026, 00:11:29 UTC

Last enriched: 10/14/2026, 23:10:26 UTC

Last updated: 10/20/2026, 18:48:18 UTC

Views: 129

Community Reviews

0 reviews

Crowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.

Sort by
Loading community insights…

Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.

Actions

PRO

Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.

Please log in to the Console to use AI analysis features.

Need more coverage?

Upgrade to Pro Console for AI refresh and higher limits.

For incident response and remediation, OffSeq services can help resolve threats faster.

Latest Threats

Breach by OffSeqOFFSEQFRIENDS — 25% OFF

Check if your credentials are on the dark web

Instant breach scanning across billions of leaked records. Free tier available.

Scan now
OffSeq TrainingCredly Certified

Lead Pen Test Professional

Technical5-day eLearningPECB Accredited
View courses