CVE-2026-5121Suited to automated attack · CISA

Libarchive: libarchive: arbitrary code execution via integer overflow in iso9660 image processing

CVSS score

7.5

EPSS probability

%1.4

Risk score

0.1

Published

6 mo ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-5121 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-5121 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support	View
2	Red Hat	Red Hat Enterprise Linux 8	View
3	Red Hat	Red Hat Enterprise Linux 8.2 Advanced Update Support	View
4	Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	View
5	Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	View
6	Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	View
7	Red Hat	Red Hat Enterprise Linux 8.6 Telecommunications Update Service	View
8	Red Hat	Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions	View
9	Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service	View
10	Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions	View
11	Red Hat	Red Hat Enterprise Linux 9	View
12	Red Hat	Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions	View
13	Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	View
14	Red Hat	Red Hat Enterprise Linux 9.4 Extended Update Support	View
15	Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support	View
16	Red Hat	Red Hat OpenShift Container Platform 4.12	View
17	Red Hat	Red Hat OpenShift Container Platform 4.13	View
18	Red Hat	Red Hat OpenShift Container Platform 4.14	View
19	Red Hat	Red Hat OpenShift Container Platform 4.15	View
20	Red Hat	Red Hat OpenShift Container Platform 4.16	View
21	Red Hat	Red Hat OpenShift Container Platform 4.17	View
22	Red Hat	Red Hat OpenShift Container Platform 4.18	View
23	Red Hat	Red Hat OpenShift Container Platform 4.19	View
24	Red Hat	RHEL-8 based Middleware Containers	View
25	Red Hat	RHEL-8 based Middleware Containers	View
26	Red Hat	RHEL-8 based Middleware Containers	View
27	Red Hat	RHEL-8 based Middleware Containers	View
28	Red Hat	RHEL-8 based Middleware Containers	View
29	Red Hat	RHEL-8 based Middleware Containers	View
30	Red Hat	RHEL-8 based Middleware Containers	View
31	Red Hat	Cert Manager support for Red Hat OpenShift release 1.20	View
32	Red Hat	Red Hat AI Inference Server 3.2	View
33	Red Hat	Red Hat AI Inference Server 3.2	View
34	Red Hat	Red Hat AI Inference Server 3.2	View
35	Red Hat	Red Hat AI Inference Server 3.3	View
36	Red Hat	Red Hat AI Inference Server 3.3	View
37	Red Hat	Red Hat AI Inference Server 3.3	View
38	Red Hat	Red Hat AI Inference Server 3.3	View
39	Red Hat	Red Hat Discovery 2	View
40	Red Hat	Red Hat Hardened Images	View
41	Red Hat	Red Hat Insights proxy 1.5	View
42	Red Hat	Red Hat Update Infrastructure 5	View
43	Red Hat	Red Hat Update Infrastructure 5	View
44	Red Hat	Red Hat Update Infrastructure 5	View
45	Red Hat	Red Hat Update Infrastructure 5	View
46	Red Hat	Red Hat Update Infrastructure 5	View
47	Red Hat	Red Hat Update Infrastructure 5	View
48	Red Hat	Red Hat Update Infrastructure 5	View
49	Red Hat	Red Hat Enterprise Linux 10	View
50	Red Hat	Red Hat Enterprise Linux 6	View
51	Red Hat	Red Hat OpenShift Container Platform 4	View
52	libarchive	libarchive	View
53	redhat	hardened images	View
54	redhat	openshift container platform	View
55	redhat	enterprise linux	View
56	redhat	enterprise linux	View
57	redhat	enterprise linux	View
58	redhat	enterprise linux	View
59	redhat	enterprise linux	View

Total affected vendors: 3|Products: 59

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
9.8	CVSS V31	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD
9.8	CVSS V3_1	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CVE ADP
8.6	CVSS 3.x	—	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H/E:U	Microsoft MSRC
7.5	CVSS V31	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	NVD
7.5	CVSS V3_1	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	CVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

2 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source

reference

Yama veya çözüm referansı

Open source

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Apply the official update named in the evidence only to the matching product and version.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-5121 is associated with the following CWEs:

CWE-190: Integer Overflow or Wraparound

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-5121 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

UserGerekmiyor

Official Sources and Advisories

RHSA-2026:10065vendor-advisory RHSA-2026:10097vendor-advisory RHSA-2026:11768vendor-advisory RHSA-2026:12071vendor-advisory RHSA-2026:12274vendor-advisory RHSA-2026:13812vendor-advisory RHSA-2026:14773vendor-advisory RHSA-2026:14937vendor-advisory RHSA-2026:15087vendor-advisory RHSA-2026:16008vendor-advisory

CVSS Vector Radar Chart

7.5 / 10

Vulnerability Scoring Details

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

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone required

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)None

Yama doğrulandı

2 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

Red Hat

libarchive

redhat

Weakness Type (CWE & CAPEC)

CWE-190

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Get this vulnerability through the API

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

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curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.enginteksut.com.tr/api/v1/intel/cves/CVE-2026-5121"