Vulnerability-Lookup

ubuntu-cve-2026-4426

Vulnerability from osv_ubuntu

Published

2026-03-19 15:16

Modified

2026-05-21 19:34

Summary

Details

A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field (pz_log2_bs) read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to incorrect memory allocation and potential application crashes, resulting in a denial-of-service (DoS) condition.

Severity

6.5 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-4426	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-4426	REPORT
	https://access.redhat.com/security/cve/CVE-2026-4426	REPORT
	https://github.com/libarchive/libarchive/pull/2897	REPORT
	https://ubuntu.com/security/notices/USN-8292-1	ADVISORY

JSON

To clipboard

{
  "affected": [
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      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
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        "3.2.2-3.1ubuntu0.2",
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        "3.2.2-3.1ubuntu0.7+esm2"
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        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
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            "binary_version": "3.4.0-2ubuntu1.5+esm2"
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        ]
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        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "libarchive",
        "purl": "pkg:deb/ubuntu/libarchive@3.4.0-2ubuntu1.5+esm2?arch=source\u0026distro=esm-infra/focal"
      },
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        "3.4.0-1",
        "3.4.0-1build1",
        "3.4.0-1ubuntu2",
        "3.4.0-2ubuntu1",
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        "3.4.0-2ubuntu1.2",
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        "3.4.0-2ubuntu1.4",
        "3.4.0-2ubuntu1.5",
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    },
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            "binary_name": "libarchive-tools",
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            "binary_name": "libarchive13",
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        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libarchive",
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      },
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            },
            {
              "fixed": "3.6.0-1ubuntu1.7"
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      ],
      "versions": [
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        "3.4.3-2build1",
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        "3.5.2-1ubuntu1",
        "3.6.0-1ubuntu1",
        "3.6.0-1ubuntu1.1",
        "3.6.0-1ubuntu1.2",
        "3.6.0-1ubuntu1.3",
        "3.6.0-1ubuntu1.4",
        "3.6.0-1ubuntu1.5",
        "3.6.0-1ubuntu1.6"
      ]
    },
    {
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        "availability": "No subscription required",
        "binaries": [
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            "binary_name": "libarchive-tools",
            "binary_version": "3.7.2-2ubuntu0.7"
          },
          {
            "binary_name": "libarchive13t64",
            "binary_version": "3.7.2-2ubuntu0.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
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        "3.7.2-1ubuntu2",
        "3.7.2-1.1ubuntu2",
        "3.7.2-2",
        "3.7.2-2ubuntu0.1",
        "3.7.2-2ubuntu0.2",
        "3.7.2-2ubuntu0.3",
        "3.7.2-2ubuntu0.4",
        "3.7.2-2ubuntu0.5",
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      },
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  ],
  "aliases": [],
  "details": "A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field (`pz_log2_bs`) read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to incorrect memory allocation and potential application crashes, resulting in a denial-of-service (DoS) condition.",
  "id": "UBUNTU-CVE-2026-4426",
  "modified": "2026-05-21T19:34:31Z",
  "published": "2026-03-19T15:16:00Z",
  "references": [
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      "url": "https://ubuntu.com/security/CVE-2026-4426"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-4426"
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      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-4426"
    },
    {
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      "url": "https://github.com/libarchive/libarchive/pull/2897"
    },
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      "url": "https://ubuntu.com/security/notices/USN-8292-1"
    }
  ],
  "related": [
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  "schema_version": "1.7.0",
  "severity": [
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      "type": "CVSS_V3"
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      "score": "medium",
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  "upstream": [
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}

CVE-2026-4426 (GCVE-0-2026-4426)

Vulnerability from cvelistv5 – Published: 2026-03-19 13:53 – Updated: 2026-05-03 20:57

Title

Libarchive: libarchive: denial of service via malformed iso file processing

Summary

A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field (`pz_log2_bs`) read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to incorrect memory allocation and potential application crashes, resulting in a denial-of-service (DoS) condition.

Severity

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-1335 - Incorrect Bitwise Shift of Integer

Assigner

redhat

References

4 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:8944	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-4426	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2449010	issue-trackingx_refsource_REDHAT
https://github.com/libarchive/libarchive/pull/2897

Impacted products

7 products

Vendor	Product	Version
Red Hat	Red Hat Hardened Images	Unaffected: 3.8.7-1.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-03-19 00:00

Credits

Red Hat would like to thank Elhanan Haenel for reporting this issue.

Show details on NVD website

JSON

To clipboard

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    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-4426",
    "datePublished": "2026-03-19T13:53:39.318Z",
    "dateReserved": "2026-03-19T12:43:31.427Z",
    "dateUpdated": "2026-05-03T20:57:03.196Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

usn-8292-1

Vulnerability from osv_ubuntu

Published

2026-05-21 14:28

Modified

2026-05-21 14:28

Summary

libarchive vulnerabilities

Details

It was discovered that libarchive incorrectly handled certain RAR archives. An attacker could possibly use this issue to cause an out-of-bounds read via a crafted RAR archive, leading to sensitive memory disclosure. (CVE-2026-4424)

It was discovered that libarchive incorrectly handled certain ISO files. An attacker could possibly use this issue to cause incorrect memory allocation via a crafted ISO file, leading to a denial of service. (CVE-2026-4426)

It was discovered that libarchive incorrectly handled block pointer allocation in zisofs on 32-bit systems. An attacker could possibly use this issue to cause a heap buffer overflow via a crafted ISO9660 image, possibly leading to arbitrary code execution. (CVE-2026-5121)

References

URL

Type

	https://ubuntu.com/security/notices/USN-8292-1	ADVISORY
	https://ubuntu.com/security/CVE-2026-4424	REPORT
	https://ubuntu.com/security/CVE-2026-4426	REPORT
	https://ubuntu.com/security/CVE-2026-5121	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-4424",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-4426",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5121",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:14.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "bsdcpio",
            "binary_version": "3.1.2-7ubuntu2.8+esm5"
          },
          {
            "binary_name": "bsdtar",
            "binary_version": "3.1.2-7ubuntu2.8+esm5"
          },
          {
            "binary_name": "libarchive13",
            "binary_version": "3.1.2-7ubuntu2.8+esm5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "libarchive",
        "purl": "pkg:deb/ubuntu/libarchive@3.1.2-7ubuntu2.8+esm5?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.2-7ubuntu2.8+esm5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.2-5ubuntu1",
        "3.1.2-7ubuntu1",
        "3.1.2-7ubuntu2",
        "3.1.2-7ubuntu2.1",
        "3.1.2-7ubuntu2.2",
        "3.1.2-7ubuntu2.3",
        "3.1.2-7ubuntu2.4",
        "3.1.2-7ubuntu2.6",
        "3.1.2-7ubuntu2.7",
        "3.1.2-7ubuntu2.8",
        "3.1.2-7ubuntu2.8+esm1",
        "3.1.2-7ubuntu2.8+esm3",
        "3.1.2-7ubuntu2.8+esm4"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-4424",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-4426",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5121",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "bsdcpio",
            "binary_version": "3.1.2-11ubuntu0.16.04.8+esm3"
          },
          {
            "binary_name": "bsdtar",
            "binary_version": "3.1.2-11ubuntu0.16.04.8+esm3"
          },
          {
            "binary_name": "libarchive13",
            "binary_version": "3.1.2-11ubuntu0.16.04.8+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "libarchive",
        "purl": "pkg:deb/ubuntu/libarchive@3.1.2-11ubuntu0.16.04.8+esm3?arch=source\u0026distro=esm-infra-legacy/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.2-11ubuntu0.16.04.8+esm3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.2-11build1",
        "3.1.2-11ubuntu0.16.04.1",
        "3.1.2-11ubuntu0.16.04.2",
        "3.1.2-11ubuntu0.16.04.3",
        "3.1.2-11ubuntu0.16.04.4",
        "3.1.2-11ubuntu0.16.04.5",
        "3.1.2-11ubuntu0.16.04.6",
        "3.1.2-11ubuntu0.16.04.7",
        "3.1.2-11ubuntu0.16.04.8",
        "3.1.2-11ubuntu0.16.04.8+esm1",
        "3.1.2-11ubuntu0.16.04.8+esm2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-4424",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-4426",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5121",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "bsdcpio",
            "binary_version": "3.2.2-3.1ubuntu0.7+esm3"
          },
          {
            "binary_name": "bsdtar",
            "binary_version": "3.2.2-3.1ubuntu0.7+esm3"
          },
          {
            "binary_name": "libarchive-tools",
            "binary_version": "3.2.2-3.1ubuntu0.7+esm3"
          },
          {
            "binary_name": "libarchive13",
            "binary_version": "3.2.2-3.1ubuntu0.7+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "libarchive",
        "purl": "pkg:deb/ubuntu/libarchive@3.2.2-3.1ubuntu0.7+esm3?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.2.2-3.1ubuntu0.7+esm3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.2.2-3.1",
        "3.2.2-3.1ubuntu0.1",
        "3.2.2-3.1ubuntu0.2",
        "3.2.2-3.1ubuntu0.3",
        "3.2.2-3.1ubuntu0.4",
        "3.2.2-3.1ubuntu0.5",
        "3.2.2-3.1ubuntu0.6",
        "3.2.2-3.1ubuntu0.7",
        "3.2.2-3.1ubuntu0.7+esm1",
        "3.2.2-3.1ubuntu0.7+esm2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-4424",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-4426",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5121",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libarchive-tools",
            "binary_version": "3.4.0-2ubuntu1.5+esm2"
          },
          {
            "binary_name": "libarchive13",
            "binary_version": "3.4.0-2ubuntu1.5+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "libarchive",
        "purl": "pkg:deb/ubuntu/libarchive@3.4.0-2ubuntu1.5+esm2?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.4.0-2ubuntu1.5+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.4.0-1",
        "3.4.0-1build1",
        "3.4.0-1ubuntu2",
        "3.4.0-2ubuntu1",
        "3.4.0-2ubuntu1.1",
        "3.4.0-2ubuntu1.2",
        "3.4.0-2ubuntu1.3",
        "3.4.0-2ubuntu1.4",
        "3.4.0-2ubuntu1.5",
        "3.4.0-2ubuntu1.5+esm1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-4424",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-4426",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5121",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libarchive-tools",
            "binary_version": "3.6.0-1ubuntu1.7"
          },
          {
            "binary_name": "libarchive13",
            "binary_version": "3.6.0-1ubuntu1.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libarchive",
        "purl": "pkg:deb/ubuntu/libarchive@3.6.0-1ubuntu1.7?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.6.0-1ubuntu1.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.4.3-2",
        "3.4.3-2build1",
        "3.5.2-1",
        "3.5.2-1ubuntu1",
        "3.6.0-1ubuntu1",
        "3.6.0-1ubuntu1.1",
        "3.6.0-1ubuntu1.2",
        "3.6.0-1ubuntu1.3",
        "3.6.0-1ubuntu1.4",
        "3.6.0-1ubuntu1.5",
        "3.6.0-1ubuntu1.6"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-4424",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-4426",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5121",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libarchive-tools",
            "binary_version": "3.7.2-2ubuntu0.7"
          },
          {
            "binary_name": "libarchive13t64",
            "binary_version": "3.7.2-2ubuntu0.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libarchive",
        "purl": "pkg:deb/ubuntu/libarchive@3.7.2-2ubuntu0.7?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.7.2-2ubuntu0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.6.2-1ubuntu1",
        "3.7.2-1ubuntu1",
        "3.7.2-1ubuntu2",
        "3.7.2-1.1ubuntu2",
        "3.7.2-2",
        "3.7.2-2ubuntu0.1",
        "3.7.2-2ubuntu0.2",
        "3.7.2-2ubuntu0.3",
        "3.7.2-2ubuntu0.4",
        "3.7.2-2ubuntu0.5",
        "3.7.2-2ubuntu0.6"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-4424",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-4426",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5121",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:25.10"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libarchive-tools",
            "binary_version": "3.7.7-0ubuntu3.2"
          },
          {
            "binary_name": "libarchive13t64",
            "binary_version": "3.7.7-0ubuntu3.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libarchive",
        "purl": "pkg:deb/ubuntu/libarchive@3.7.7-0ubuntu3.2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.7.7-0ubuntu3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.7.7-0ubuntu2",
        "3.7.7-0ubuntu2.1",
        "3.7.7-0ubuntu2.2",
        "3.7.7-0ubuntu3",
        "3.7.7-0ubuntu3.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-4424",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-4426",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5121",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libarchive-tools",
            "binary_version": "3.8.5-1ubuntu2.1"
          },
          {
            "binary_name": "libarchive13t64",
            "binary_version": "3.8.5-1ubuntu2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libarchive",
        "purl": "pkg:deb/ubuntu/libarchive@3.8.5-1ubuntu2.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.8.5-1ubuntu2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.7.7-0ubuntu3",
        "3.8.5-1ubuntu1",
        "3.8.5-1ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that libarchive incorrectly handled certain RAR\narchives. An attacker could possibly use this issue to cause an\nout-of-bounds read via a crafted RAR archive, leading to sensitive\nmemory disclosure. (CVE-2026-4424)\n\nIt was discovered that libarchive incorrectly handled certain ISO files.\nAn attacker could possibly use this issue to cause incorrect memory\nallocation via a crafted ISO file, leading to a denial of service.\n(CVE-2026-4426)\n\nIt was discovered that libarchive incorrectly handled block pointer\nallocation in zisofs on 32-bit systems. An attacker could possibly use\nthis issue to cause a heap buffer overflow via a crafted ISO9660 image,\npossibly leading to arbitrary code execution. (CVE-2026-5121)",
  "id": "USN-8292-1",
  "modified": "2026-05-21T14:28:35Z",
  "published": "2026-05-21T14:28:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8292-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-4424"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-4426"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-5121"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "libarchive vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-4424",
    "UBUNTU-CVE-2026-4426",
    "UBUNTU-CVE-2026-5121"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

ubuntu-cve-2026-4426

Vulnerability from osv_ubuntu

CVE-2026-4426 (GCVE-0-2026-4426)

usn-8292-1

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature