Description
A flaw was found in libarchive. On 32-bit systems, an integer overflow vulnerability exists in the zisofs block pointer allocation logic. A remote attacker can exploit this by providing a specially crafted ISO9660 image, which can lead to a heap buffer overflow. This could potentially allow for arbitrary code execution on the affected system.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 8.2 Advanced Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Telecommunications Update Service | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | — | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.12 | — | — |
| 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 | RHEL-8 based Middleware Containers | — | — |
| 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 3.2 | — | — |
| Red Hat | Red Hat AI Inference Server 3.3 | — | — |
| Red Hat | Red Hat Discovery 2 | — | — |
| Red Hat | Red Hat Hardened Images | — | — |
| Red Hat | Red Hat Insights proxy 1.5 | — | — |
| Red Hat | Red Hat Update Infrastructure 5 | — | — |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libarchive | 3.8.7-1 | — |
| Debian 13 | libarchive | 3.7.4-4+deb13u1 | — |
| Debian 12 | libarchive | 3.6.2-1+deb12u4 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | libarchive | 3.8.5-1ubuntu2.1 | USN-8292-1 |
| Ubuntu 25.10 | libarchive | 3.7.7-0ubuntu3.2 | USN-8292-1 |
| Ubuntu 24.04 LTS | libarchive | 3.7.2-2ubuntu0.7 | USN-8292-1 |
| Ubuntu 22.04 LTS | libarchive | 3.6.0-1ubuntu1.7 | USN-8292-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | libarchive | 3.4.0-2ubuntu1.5+esm2 | USN-8292-1 |
| Ubuntu Pro 18.04 LTS | libarchive | 3.2.2-3.1ubuntu0.7+esm3 | USN-8292-1 |
| Ubuntu Pro 16.04 LTS | libarchive | 3.1.2-11ubuntu0.16.04.8+esm3 | USN-8292-1 |
| Ubuntu Pro 14.04 LTS | libarchive | 3.1.2-7ubuntu2.8+esm5 | USN-8292-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | bsdtar +2 | 3.5.3-9.el9_7 | RHSA-2026:8510 |
| RHEL 8 | bsdtar +2 | 3.3.3-7.el8_10 | RHSA-2026:8534 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.6 EUS | bsdtar +2 | 3.5.3-7.el9_6.1 | RHSA-2026:8866 |
| RHEL 9.4 EUS | bsdtar +2 | 3.5.3-5.el9_4 | RHSA-2026:8873 |
| RHEL 9.2 E4S | bsdtar +1 | 3.5.3-5.el9_2.2 | RHSA-2026:8864 |
| RHEL 9.0 E4S | bsdtar +1 | 3.5.3-2.el9_0.4 | RHSA-2026:8867 |
| RHEL 8.8 TUS | bsdtar +1 | 3.3.3-5.el8_8.2 | RHSA-2026:9026 |
| RHEL 8.8 E4S | bsdtar +1 | 3.3.3-5.el8_8.2 | RHSA-2026:9026 |
| RHEL 8.6 TUS | bsdtar +1 | 3.3.3-6.el8_6.1 | RHSA-2026:8908 |
| RHEL 8.6 E4S | bsdtar +1 | 3.3.3-6.el8_6.1 | RHSA-2026:8908 |
| RHEL 8.6 AUS | bsdtar +1 | 3.3.3-6.el8_6.1 | RHSA-2026:8908 |
| RHEL 8.4 EUS Long Life | bsdtar +1 | 3.3.3-1.el8_4.2 | RHSA-2026:9592 |
| RHEL 8.4 AUS | bsdtar +1 | 3.3.3-1.el8_4.2 | RHSA-2026:9592 |
| RHEL 8.2 AUS | bsdtar +1 | 3.3.2-8.el8_2.2 | RHSA-2026:8521 |
| RHEL 7 ELS | bsdtar +3 | 3.1.2-14.el7_9.2 | RHSA-2026:8517 |
| Red Hat Hardened Images 1 | libarchive +1 | 3.8.7-1.hum1 | RHSA-2026:8944 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | bsdtar +2 | 3.5.3-9.el9_7 | ALSA-2026:8510 |
| AlmaLinux 8 | bsdtar +2 | 3.3.3-7.el8_10 | ALSA-2026:8534 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | libarchive | 3.5.3-9.el9_7 | RLSA-2026:8510 |
| Rocky Linux 8 | libarchive | 3.3.3-7.el8_10 | RLSA-2026:8534 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | libarchive | 3.7.2-150600.3.20.1 | SUSE-SU-2026:2490-1 |
| SLES 15 SP6 | libarchive | 3.7.2-150600.3.20.1 | SUSE-SU-2026:2490-1 |
| SLES 15 SP5 | libarchive | 3.5.1-150400.3.24.1 | SUSE-SU-2026:2599-1 |
| SLES 15 SP4 | libarchive | 3.5.1-150400.3.24.1 | SUSE-SU-2026:2599-1 |
| SLES 12 SP5 | libarchive | 3.3.3-32.17.1 | SUSE-SU-2026:2747-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | libarchive | 3.7.2-150600.3.20.1 | SUSE-SU-2026:2490-1 |
| SLES for SAP 15 SP5 | libarchive | 3.5.1-150400.3.24.1 | SUSE-SU-2026:2599-1 |
| SLES for SAP 15 SP4 | libarchive | 3.5.1-150400.3.24.1 | SUSE-SU-2026:2599-1 |
| SLE Micro 6.1 | libarchive | 3.7.4-slfo.1.1_4.1 | SUSE-SU-2026:22248-1 |
| SLE Micro 6.0 | libarchive | 3.6.2-6.1 | SUSE-SU-2026:22241-1 |
| SLE Micro 5.5 | libarchive | 3.5.1-150400.3.24.1 | SUSE-SU-2026:2599-1 |
| SLE Micro 5.4 | libarchive | 3.5.1-150400.3.24.1 | SUSE-SU-2026:2599-1 |
| SLE Micro 5.3 | libarchive | 3.5.1-150400.3.24.1 | SUSE-SU-2026:2599-1 |
| SLE HPC 15 SP5 | libarchive | 3.5.1-150400.3.24.1 | SUSE-SU-2026:2599-1 |
| SLE HPC 15 SP4 | libarchive | 3.5.1-150400.3.24.1 | SUSE-SU-2026:2599-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | bsdtar +3 | 3.1.2-14.amzn2.0.6 | ALAS2-2026-3257 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libarchive | 3.7.7-6 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | bsdtar +2 | 3.5.3-9.el9_7 | ELSA-2026-8510 |
| Oracle Linux 8 | bsdtar +2 | 3.3.3-7.el8_10 | ELSA-2026-8534 |
| Oracle Linux 7 | bsdtar +3 | 3.1.2-14.0.3.el7_9 | ELSA-2026-8517 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | libarchive +3 | 3.8.7-r0 | — |
Advisories 32
- ALSA-2026:8510 Important: libarchive security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:8534 Important: libarchive security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:9592 Red Hat Security Advisory: libarchive security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:9026 Red Hat Security Advisory: libarchive security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:8944 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:8908 Red Hat Security Advisory: libarchive security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:8873 Red Hat Security Advisory: libarchive security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:8867 Red Hat Security Advisory: libarchive security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:8866 Red Hat Security Advisory: libarchive security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:8864 Red Hat Security Advisory: libarchive security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:8534 Red Hat Security Advisory: libarchive security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:8521 Red Hat Security Advisory: libarchive security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:8517 Red Hat Security Advisory: libarchive security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:8510 Red Hat Security Advisory: libarchive security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- WID-SEC-2026-0923 libarchive: Schwachstelle ermöglicht Codeausführung BSI CERT-Bund (WID) · Oct 14, 2026
- VDE-2026-088 METTLER TOLEDO: LabX Standard and Enterprise Report on External Component Analysis - v21.4 CERT@VDE · Sep 10, 2026
- ELSA-2026-8517 Important: libarchive security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 10, 2026
- WID-SEC-2026-1666 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 28, 2026
- ICSA-26-202-04 Siemens SIDIS Secured SmartPlug CISA ICS & IT advisories · Jul 21, 2026
- NCSC-2026-0229 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Jul 14, 2026
- SSA-585531 SSA-585531: Multiple Vulnerabilities in SIDIS Secured SmartPlug before V7.26.0310 Siemens ProductCERT · Jul 14, 2026
- SUSE-SU-2026:2747-1 Security update for libarchive SUSE / openSUSE Security Updates · Jul 4, 2026
- SUSE-SU-2026:22248-1 Security update for libarchive SUSE / openSUSE Security Updates · Jun 26, 2026
- SUSE-SU-2026:22241-1 Security update for libarchive SUSE / openSUSE Security Updates · Jun 26, 2026
- SUSE-SU-2026:2599-1 Security update for libarchive SUSE / openSUSE Security Updates · Jun 24, 2026
- SUSE-SU-2026:2490-1 Security update for libarchive SUSE / openSUSE Security Updates · Jun 24, 2026
- USN-8292-1 libarchive vulnerabilities Ubuntu Security Notices (USN) · May 21, 2026
- ALAS2-2026-3257 Important: libarchive security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 29, 2026
- RLSA-2026:8510 Important: libarchive security update Rocky Linux Security Advisories · Apr 19, 2026
- RLSA-2026:8534 Important: libarchive security update Rocky Linux Security Advisories · Apr 18, 2026
- ELSA-2026-8510 Important: libarchive security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Apr 16, 2026
- ELSA-2026-8534 Important: libarchive security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Apr 16, 2026
References
- RHSA-2026:10065 vendor-advisory
- RHSA-2026:10097 vendor-advisory
- RHSA-2026:11768 vendor-advisory
- RHSA-2026:12071 vendor-advisory
- RHSA-2026:12274 vendor-advisory
- RHSA-2026:13812 vendor-advisory
- RHSA-2026:14773 vendor-advisory
- RHSA-2026:14937 vendor-advisory
- RHSA-2026:15087 vendor-advisory
- RHSA-2026:16008 vendor-advisory
- RHSA-2026:16009 vendor-advisory
- RHSA-2026:16030 vendor-advisory
- RHSA-2026:16174 vendor-advisory
- RHSA-2026:17596 vendor-advisory
- RHSA-2026:19724 vendor-advisory
- RHSA-2026:19725 vendor-advisory
- RHSA-2026:20040 vendor-advisory
- RHSA-2026:21690 vendor-advisory
- RHSA-2026:25096 vendor-advisory
- RHSA-2026:72502 vendor-advisory
- RHSA-2026:82304 vendor-advisory
- RHSA-2026:82322 vendor-advisory
- RHSA-2026:82347 vendor-advisory
- RHSA-2026:82354 vendor-advisory
- RHSA-2026:82372 vendor-advisory
- RHSA-2026:82857 vendor-advisory
- RHSA-2026:82888 vendor-advisory
- RHSA-2026:8510 vendor-advisory
- RHSA-2026:8517 vendor-advisory
- RHSA-2026:8521 vendor-advisory
- RHSA-2026:8534 vendor-advisory
- RHSA-2026:8864 vendor-advisory
- RHSA-2026:8866 vendor-advisory
- RHSA-2026:8867 vendor-advisory
- RHSA-2026:8873 vendor-advisory
- RHSA-2026:8908 vendor-advisory
- RHSA-2026:8944 vendor-advisory
- RHSA-2026:9026 vendor-advisory
- RHSA-2026:9592 vendor-advisory
- RHSA-2026:9832 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-5121 vdb-entry
- RHBZ#2452945 issue-tracking
- https://github.com/advisories/GHSA-2vwv-vqpv-v8vc
- https://github.com/libarchive/libarchive/pull/2934