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Fencer Vulns
high 7.5

CVE-2026-14164 json

Libarchive: double-free vulnerability in rar5 decompression logic via dangling filtered_buf pointer in init_unpack()

published 2026-06-30 4 mo ago modified 2026-11-06 3 d ago also EUVD-2026-40259

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

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.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:3.7.7-10.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:3.7.7-5.el10_0.1
  • Red Hat Red Hat Enterprise Linux 9 0:3.5.3-11.el9_8
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:3.5.3-5.el9_2.3
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:3.5.3-5.el9_4.2
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:3.5.3-7.el9_6.2
  • Red Hat Red Hat OpenShift Container Platform 4.13 413.92.202609080414-0
  • Red Hat Red Hat OpenShift Container Platform 4.14 414.92.202609011250-0
  • Red Hat Red Hat OpenShift Container Platform 4.15 415.92.202609140326-0
  • Red Hat Red Hat OpenShift Container Platform 4.16 416.94.202609140240-0
  • Red Hat Red Hat OpenShift Container Platform 4.17 417.94.202609191027-0
  • Red Hat Red Hat OpenShift Container Platform 4.18 418.94.202609031320-0, 418.94.202609171815-0
  • Red Hat Red Hat OpenShift Container Platform 4.19 4.19.9.6.202609021231-0
  • Red Hat Red Hat OpenShift Container Platform 4.20 4.20.9.6.202609021029-0
  • Red Hat Red Hat OpenShift Container Platform 4.21 4.21.9.6.202609021100-0
  • Red Hat Red Hat OpenShift Container Platform 4.22 4.22.9.8.202608130832-0
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.17 1791371069, 1791371080, 1791378395, 1791788287, 1791970484
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.18 1789029076, 1791459707, 1791459711, 1791459759, 1791966259
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.20 1790223279, 1790223719, 1790272426, 1790589855, 1790589912, 1790589914, 1790589998, 1790598593
  • Red Hat Red Hat AI Inference Server 3.5 1791427182, 1791818357
  • Red Hat Red Hat Discovery 2 1786638573, 1788206196
  • Red Hat Red Hat Hardened Images 3.8.8-2.hum1
  • Red Hat Red Hat OpenShift AI 3.0 1790276884, 1790276886, 1790276889, 1790276974, 1790277045
  • Red Hat Red Hat OpenShift AI 3.2 1790703494, 1790703497, 1790703506, 1790703568, 1790703586, 1790703590
  • Red Hat Red Hat OpenShift AI 3.4 1790703542
  • Red Hat Red Hat Update Infrastructure 5 1786435241, 1786435483, 1786533449, 1786533457, 1786533529, 1787135742, 1787241211, 1787241260
  • libarchive Debian 12 3.6.2-1+deb12u5
  • libarchive Debian 14 3.8.8-1

debian advisories DEBIAN-CVE-2026-14164

  • libarchive Ubuntu 22.04 LTS 3.6.0-1ubuntu1.8
  • libarchive Ubuntu 24.04 LTS 3.7.2-2ubuntu0.8
  • libarchive Ubuntu 26.04 LTS 3.8.5-1ubuntu2.2
  • libarchive Ubuntu Pro 20.04 LTS 3.4.0-2ubuntu1.5+esm3

ubuntu advisories UBUNTU-CVE-2026-14164

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libarchive RHEL 9 3.5.3-11.el9_8
  • bsdtar RHEL 9 3.5.3-11.el9_8
  • libarchive RHEL 10.2 3.7.7-10.el10_2
  • bsdtar RHEL 10.2 3.7.7-10.el10_2
  • bsdcat hummingbird 1 3.8.8-2.hum1
  • bsdtar hummingbird 1 3.8.8-2.hum1
  • bsdcpio hummingbird 1 3.8.8-2.hum1
  • bsdunzip hummingbird 1 3.8.8-2.hum1

red hat advisories RHSA-2026:58574RHSA-2026:58573RHSA-2026:58558RHSA-2026:56954RHSA-2026:52674RHSA-2026:52675

  • libarchive AlmaLinux 9 3.5.3-11.el9_8
  • bsdtar AlmaLinux 9 3.5.3-11.el9_8
  • libarchive AlmaLinux 10 3.7.7-10.el10_2
  • bsdtar AlmaLinux 10 3.7.7-10.el10_2

almalinux advisories ALSA-2026:52674ALSA-2026:52675

  • libarchive Rocky Linux 10 3.7.7-10.el10_2
  • libarchive Rocky Linux 9 3.5.3-11.el9_8

rocky linux advisories RLSA-2026:52675RLSA-2026:52674

  • libarchive Azure Linux 3.0 3.7.7-7

azure linux advisories AZL-91713

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-14164 updated cvss 7.5

libarchive: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in init_unpack()

  • Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: workaround, no fix available
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.17 cert-manager/cert-manager-operator-rhel9 1791788287, cert-manager/jetstack-cert-manager-rhel9 1791371069, cert-manager/cert-manager-istio-csr-rhel9 1791378395, cert-manager/cert-manager-operator-bundle 1791970484, cert-manager/jetstack-cert-manager-acmesolver-rhel9 1791371080
    fixed: vendor fix RHSA-2026:82336
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.18 cert-manager/cert-manager-operator-rhel9 1789029076, cert-manager/jetstack-cert-manager-rhel9 1791459711, cert-manager/cert-manager-istio-csr-rhel9 1791459759, cert-manager/cert-manager-operator-bundle 1791966259, cert-manager/jetstack-cert-manager-acmesolver-rhel9 1791459707
    fixed: vendor fix RHSA-2026:82354
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.20 cert-manager/cert-manager-operator-rhel9 1790272426, cert-manager/cert-manager-operator-rhel9 1790589855, cert-manager/jetstack-cert-manager-rhel9 1790223279, cert-manager/jetstack-cert-manager-rhel9 1790589912, cert-manager/cert-manager-istio-csr-rhel9 1790223719, cert-manager/cert-manager-istio-csr-rhel9 1790589914, +2 more
    fixed: vendor fix RHSA-2026:72475
  • Red Hat AI Inference Server 3.5 rhaii/vllm-gaudi-rhel9 1791427182, rhaii/vllm-spyre-rhel9 1791818357
    fixed: vendor fix RHSA-2026:82061
  • Red Hat Discovery 2 discovery/discovery-ui-rhel9 1788206196, discovery/discovery-server-rhel9 1786638573
    fixed: vendor fix RHSA-2026:54760
  • Red Hat Enterprise Linux AppStream (v. 9) bsdtar 3.5.3-11.el9_8
    fixed: vendor fix RHSA-2026:52674
  • Red Hat Enterprise Linux AppStream (v. 10) bsdtar 3.7.7-10.el10_2
    fixed: vendor fix RHSA-2026:52675
show 26 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) bsdtar 3.5.3-5.el9_2.3
    fixed: vendor fix RHSA-2026:58574
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) bsdtar 3.5.3-5.el9_4.2
    fixed: vendor fix RHSA-2026:58573
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) bsdtar 3.7.7-5.el10_0.1
    fixed: vendor fix RHSA-2026:56954
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) bsdtar 3.5.3-7.el9_6.2
    fixed: vendor fix RHSA-2026:58558
  • Red Hat Enterprise Linux BaseOS (v. 9) libarchive 3.5.3-11.el9_8
    fixed: vendor fix RHSA-2026:52674
  • Red Hat Enterprise Linux BaseOS (v. 10) libarchive 3.7.7-10.el10_2
    fixed: vendor fix RHSA-2026:52675
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) libarchive 3.5.3-5.el9_2.3
    fixed: vendor fix RHSA-2026:58574
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) libarchive 3.5.3-5.el9_4.2
    fixed: vendor fix RHSA-2026:58573
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) libarchive 3.7.7-5.el10_0.1
    fixed: vendor fix RHSA-2026:56954
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) libarchive 3.5.3-7.el9_6.2
    fixed: vendor fix RHSA-2026:58558
  • Red Hat Hardened Images bsdcat 3.8.8-2.hum1, bsdtar 3.8.8-2.hum1, bsdcpio 3.8.8-2.hum1, bsdunzip 3.8.8-2.hum1, libarchive 3.8.8-2.hum1
    fixed: vendor fix RHSA-2026:30333
  • Red Hat OpenShift AI 3.0 rhai/base-image-cpu-rhel9 1790277045, rhai/base-image-tpu-rhel9 1790276884, rhai/base-image-cuda-rhel9 1790276974, rhai/base-image-rocm-rhel9 1790276886, rhai/base-image-spyre-rhel9 1790276889
    fixed: vendor fix RHSA-2026:73960
  • Red Hat OpenShift AI 3.2 rhai/base-image-cpu-rhel9 1790703590, rhai/base-image-tpu-rhel9 1790703497, rhai/base-image-cuda-rhel9 1790703586, rhai/base-image-rocm-rhel9 1790703494, rhai/base-image-rocm-rhel9 1790703506, rhai/base-image-spyre-rhel9 1790703568
    fixed: vendor fix RHSA-2026:74460
  • Red Hat OpenShift AI 3.4 rhai/base-image-neuron-rhel9 1790703542
    fixed: vendor fix RHSA-2026:74674
  • Red Hat OpenShift Container Platform 4.13 rhcos 413.92.202609080414
    fixed: vendor fix RHSA-2026:65839
  • Red Hat OpenShift Container Platform 4.14 rhcos 414.92.202609011250
    fixed: vendor fix RHSA-2026:62409
  • Red Hat OpenShift Container Platform 4.15 rhcos 415.92.202609140326
    fixed: vendor fix RHSA-2026:67857
  • Red Hat OpenShift Container Platform 4.16 rhcos 416.94.202609140240
    fixed: vendor fix RHSA-2026:67935
  • Red Hat OpenShift Container Platform 4.17 rhcos 417.94.202609191027
    fixed: vendor fix RHSA-2026:70586
  • Red Hat OpenShift Container Platform 4.18 rhcos 418.94.202609031320, rhcos 418.94.202609171815
    fixed: vendor fix RHSA-2026:65851
  • Red Hat OpenShift Container Platform 4.19 rhcos 4.19.9.6.202609021231
    fixed: vendor fix RHSA-2026:63044
  • Red Hat OpenShift Container Platform 4.20 rhcos 4.20.9.6.202609021029
    fixed: vendor fix RHSA-2026:63100
  • Red Hat OpenShift Container Platform 4.21 rhcos 4.21.9.6.202609021100
    fixed: vendor fix RHSA-2026:63041
  • Red Hat OpenShift Container Platform 4.22 rhcos 4.22.9.8.202608130832
    fixed: vendor fix RHSA-2026:54769
  • Red Hat Update Infrastructure 5 rhui5/cds-rhel9 1786533457, rhui5/rhua-rhel9 1786533529, rhui5/haproxy-rhel9 1786533449, rhui5/rhua-tp-rhel9 1787241260, rhui5/installer-rhel9 1786435483, rhui5/installer-tp-rhel9 1787135742, +2 more
    fixed: vendor fix RHSA-2026:54387
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.20 cert-manager/jetstack-cert-manager-acmesolver-rhel9 1790223630 Red Hat Discovery 2 discovery/discovery-ui-rhel9 1786634825, discovery/discovery-server-rhel9 1788205779 Red Hat Enterprise Linux 6 libarchive Red Hat Enterprise Linux 7 bsdtar, bsdcpio, libarchive Red Hat Enterprise Linux 8 bsdtar, libarchive Red Hat OpenShift AI (RHOAI) rhoai/odh-llama-stack-k8s-operator-rhel9
    +1 more products
    Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8
    not affected: vulnerable code not present

1 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.79% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/libarchive/libarchive/issues/3069 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat OpenShift Container Platform 4.13
  • Red Hat Red Hat OpenShift Container Platform 4.14
  • Red Hat Red Hat OpenShift Container Platform 4.15
  • Red Hat Red Hat OpenShift Container Platform 4.16
  • Red Hat Red Hat OpenShift Container Platform 4.17
  • Red Hat Red Hat OpenShift Container Platform 4.18
  • Red Hat Red Hat OpenShift Container Platform 4.19
  • Red Hat Red Hat OpenShift Container Platform 4.20
  • Red Hat Red Hat OpenShift Container Platform 4.21
  • Red Hat Red Hat OpenShift Container Platform 4.22
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.17
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.18
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.20
  • Red Hat Red Hat AI Inference Server 3.5
  • Red Hat Red Hat Discovery 2
  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat OpenShift AI 3.0
  • Red Hat Red Hat OpenShift AI 3.2
  • Red Hat Red Hat OpenShift AI 3.4
  • Red Hat Red Hat Update Infrastructure 5
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat OpenShift AI (RHOAI)
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat OpenShift Container Platform 5

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.