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CVE Record

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

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.

CriticalCVSS 9.8Not KEV-listedUpdated
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Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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CWE-190: Exact CWE lookup

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Execution behavior lookup

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Container behavior lookup

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CVE-2026-5121 mapping review

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
5Timeline events
2ADP providers
42Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: total

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9.8CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADP
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6redhat

Vulnerability scoring details

Base CVSS 3.1 score

9.8Critical
CVSS 3.1 vector shape for CVE-2026-5121Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. Source timelineredhat

    Reported to Red Hat.

  3. Source timelineredhat

    Made public.

  4. CVE publishedCVE Program

    The CVE record was published.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Supportlibarchive, 0:3.1.2-14.el7_9.2affected
Red HatRed Hat Enterprise Linux 8libarchive, 0:3.3.3-7.el8_10affected
Red HatRed Hat Enterprise Linux 8.2 Advanced Update Supportlibarchive, 0:3.3.2-8.el8_2.2affected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportlibarchive, 0:3.3.3-1.el8_4.2affected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onlibarchive, 0:3.3.3-1.el8_4.2affected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportlibarchive, 0:3.3.3-6.el8_6.1affected
Red HatRed Hat Enterprise Linux 8.6 Telecommunications Update Servicelibarchive, 0:3.3.3-6.el8_6.1affected
Red HatRed Hat Enterprise Linux 8.6 Update Services for SAP Solutionslibarchive, 0:3.3.3-6.el8_6.1affected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Servicelibarchive, 0:3.3.3-5.el8_8.2affected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutionslibarchive, 0:3.3.3-5.el8_8.2affected
Red HatRed Hat Enterprise Linux 9libarchive, 0:3.5.3-9.el9_7affected
Red HatRed Hat Enterprise Linux 9libarchive, 0:3.5.3-9.el9_7affected
Red HatRed Hat Enterprise Linux 9.0 Update Services for SAP Solutionslibarchive, 0:3.5.3-2.el9_0.4affected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutionslibarchive, 0:3.5.3-5.el9_2.2affected
Red HatRed Hat Enterprise Linux 9.4 Extended Update Supportlibarchive, 0:3.5.3-5.el9_4affected
Red HatRed Hat Enterprise Linux 9.6 Extended Update Supportlibarchive, 0:3.5.3-7.el9_6.1affected
Red HatRed Hat OpenShift Container Platform 4.12openshift/ose-rhel-coreos-8, 412.86.202604281506-0affected
Red HatRed Hat OpenShift Container Platform 4.13openshift/ose-rhel-coreos-9, 413.92.202605271328-0affected
Red HatRed Hat OpenShift Container Platform 4.14openshift/ose-rhel-coreos-9, 414.92.202605060243-0affected
Red HatRed Hat OpenShift Container Platform 4.15openshift/ose-rhel-coreos-9, 415.92.202605060220-0affected
Red HatRed Hat OpenShift Container Platform 4.16openshift/ose-rhel-coreos-9, 416.94.202604211449-0affected
Red HatRed Hat OpenShift Container Platform 4.17openshift/ose-rhel-coreos-9, 417.94.202605112123-0affected
Red HatRed Hat OpenShift Container Platform 4.18openshift/ose-rhel-coreos-9, 418.94.202604240015-0affected
Red HatRed Hat OpenShift Container Platform 4.19openshift/ose-rhel-coreos-9, 4.19.9.6.202605201155-0affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-businesscentral-monitoring-rhel8, 7.13.5-4.1777325677affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-businesscentral-rhel8, 7.13.5-4.1777325711affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-controller-rhel8, 7.13.5-4.1777325710affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-dashbuilder-rhel8, 7.13.5-3.1777325680affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-kieserver-rhel8, 7.13.5-4.1777325709affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-process-migration-rhel8, 7.13.5-4.1777325680affected
Weakness

CWE details

CWE-190

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-190 · source CWE mapping

Integer Overflow or Wraparound

Integer Overflow or Wraparound represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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