SUSE-SU-2026:21757-1

Vulnerability from csaf_suse - Published: 2026-05-25 07:42 - Updated: 2026-05-25 07:42
Summary
Security update for libarchive
Severity
Important
Notes
Title of the patch: Security update for libarchive
Description of the patch: This update for libarchive fixes the following issues - CVE-2026-4111: logical deadlock the RAR5 filter subsystem and the half-window output limiter leads to infinite loop and DoS (bsc#1259635). - CVE-2026-4424: 257-byte heap memory leak when processing a 170-byte RAR3 (bsc#1259928). - CVE-2026-4426: undefined behavior due to unvalidated operand in shift expression of the zisofs decompression code (bsc#1259931). - CVE-2026-5121: missing validation check for pz_log2_bs can a heap buffer overflow write (bsc#1261186).
Patchnames: SUSE-SL-Micro-6.2-799
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2026-4111
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.x86_64 —
Vendor Fix
Threats
Impact important
CVE-2026-4424
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.x86_64 —
Vendor Fix
Threats
Impact important
CVE-2026-4426
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.x86_64 —
Vendor Fix
Threats
Impact important
CVE-2026-5121
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.x86_64 —
Vendor Fix
Threats
Impact important
References
To clipboard 

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  "vulnerabilities": [
    {
      "cve": "CVE-2026-4111",
      "ids": [
        {
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          "text": "https://www.suse.com/security/cve/CVE-2026-4111"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A flaw was identified in the RAR5 archive decompression logic of the libarchive library, specifically within the archive_read_data() processing path. When a specially crafted RAR5 archive is processed, the decompression routine may enter a state where internal logic prevents forward progress. This condition results in an infinite loop that continuously consumes CPU resources. Because the archive passes checksum validation and appears structurally valid, affected applications cannot detect the issue before processing. This can allow attackers to cause persistent denial-of-service conditions in services that automatically process archives.",
          "title": "CVE description"
        }
      ],
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          "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.s390x",
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        {
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          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.aarch64",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.ppc64le",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.s390x",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
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            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.aarch64",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.ppc64le",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.s390x",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.x86_64"
          ]
        }
      ],
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          "date": "2026-05-25T07:42:39Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-4111"
    },
    {
      "cve": "CVE-2026-4424",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-4424"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A flaw was found in libarchive. This heap out-of-bounds read vulnerability exists in the RAR archive processing logic due to improper validation of the LZSS sliding window size after transitions between compression methods. A remote attacker can exploit this by providing a specially crafted RAR archive, leading to the disclosure of sensitive heap memory information without requiring authentication or user interaction.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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          "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.ppc64le",
          "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.s390x",
          "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-4424",
          "url": "https://www.suse.com/security/cve/CVE-2026-4424"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1259927 for CVE-2026-4424",
          "url": "https://bugzilla.suse.com/1259927"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1265940 for CVE-2026-4424",
          "url": "https://bugzilla.suse.com/1265940"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.aarch64",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.ppc64le",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.s390x",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
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            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.ppc64le",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.s390x",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-05-25T07:42:39Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-4424"
    },
    {
      "cve": "CVE-2026-4426",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-4426"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "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.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
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          "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.ppc64le",
          "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.s390x",
          "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-4426",
          "url": "https://www.suse.com/security/cve/CVE-2026-4426"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1259930 for CVE-2026-4426",
          "url": "https://bugzilla.suse.com/1259930"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.aarch64",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.ppc64le",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.s390x",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.aarch64",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.ppc64le",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.s390x",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-05-25T07:42:39Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-4426"
    },
    {
      "cve": "CVE-2026-5121",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-5121"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "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.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.aarch64",
          "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.ppc64le",
          "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.s390x",
          "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-5121",
          "url": "https://www.suse.com/security/cve/CVE-2026-5121"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1261184 for CVE-2026-5121",
          "url": "https://bugzilla.suse.com/1261184"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1265940 for CVE-2026-5121",
          "url": "https://bugzilla.suse.com/1265940"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.aarch64",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.ppc64le",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.s390x",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.aarch64",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.ppc64le",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.s390x",
            "SUSE Linux Micro 6.2:libarchive13-3.8.1-160000.3.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-05-25T07:42:39Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-5121"
    }
  ]
}


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Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.