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Vulnerability · Published Mar 30, 2026 · Assigned by redhat

CVE-2026-5121Libarchive: libarchive: arbitrary code execution via integer overflow in iso9660 image processing

High 7.5

In plain English

A high-severity integer overflow in Cert Manager support for Red Hat OpenShift release 1.17 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 66% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.1%top 34.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bsdtar3.3.3-7.el8_10ALSA-2026:8534
AlmaLinux:9bsdtar3.5.3-9.el9_7ALSA-2026:8510
AlmaLinux:8libarchive3.3.3-7.el8_10ALSA-2026:8534
AlmaLinux:9libarchive3.5.3-9.el9_7ALSA-2026:8510
AlmaLinux:8libarchive-devel3.3.3-7.el8_10ALSA-2026:8534
AlmaLinux:9libarchive-devel3.5.3-9.el9_7ALSA-2026:8510
Debian:12libarchive3.6.2-1+deb12u4DEBIAN-CVE-2026-5121
Debian:13libarchive3.7.4-4+deb13u1DEBIAN-CVE-2026-5121
Debian:14libarchive3.8.7-1DEBIAN-CVE-2026-5121
Rocky Linux:8libarchive0:3.3.3-7.el8_10RLSA-2026:8534
Rocky Linux:9libarchive0:3.5.3-9.el9_7RLSA-2026:8510
Ubuntu:22.04:LTSlibarchive3.6.0-1ubuntu1.7USN-8292-1
Ubuntu:22.04:LTSlibarchive3.6.0-1ubuntu1.7UBUNTU-CVE-2026-5121
Ubuntu:24.04:LTSlibarchive3.7.2-2ubuntu0.7USN-8292-1
Ubuntu:24.04:LTSlibarchive3.7.2-2ubuntu0.7UBUNTU-CVE-2026-5121
Ubuntu:25.10libarchive3.7.7-0ubuntu3.2USN-8292-1
Ubuntu:25.10libarchive3.7.7-0ubuntu3.2UBUNTU-CVE-2026-5121
Ubuntu:26.04:LTSlibarchive3.8.5-1ubuntu2.1UBUNTU-CVE-2026-5121
Ubuntu:26.04:LTSlibarchive3.8.5-1ubuntu2.1USN-8292-1

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support see references
Red Hat Red Hat OpenShift Container Platform 4.12 see references
Red Hat Red Hat OpenShift Container Platform 4.13 see references
Red Hat Red Hat OpenShift Container Platform 4.14 see references
Red Hat Red Hat OpenShift Container Platform 4.15 see references
Red Hat Red Hat OpenShift Container Platform 4.16 see references
Red Hat Red Hat OpenShift Container Platform 4.17 see references
Red Hat Red Hat OpenShift Container Platform 4.18 see references
Red Hat Red Hat OpenShift Container Platform 4.19 see references
Red Hat RHEL-8 based Middleware Containers see references
Red Hat RHEL-8 based Middleware Containers see references
Red Hat RHEL-8 based Middleware Containers see references
Red Hat RHEL-8 based Middleware Containers see references
Red Hat RHEL-8 based Middleware Containers see references
Red Hat RHEL-8 based Middleware Containers see references

Weakness: CWE-190 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References