Fix of 8 CVEs

{
  "id": "27a1071c534a4d8c0d550dcbb04fa75c5245693ff310e1d602ac50e68908e5f0",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1787908647",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Fix of 8 CVEs",
    "summary": "* SECURITY UPDATE: ACLs applied to a symbolic link modified the link target instead - debian/patches/CVE-2021-23177.patch: ACLs applied to a symbolic link modified the link target instead - CVE-2021-23177 * SECURITY UPDATE: symbolic links followed when changing modes, times, ACLs and flags while extracting an archive - debian/patches/CVE-2021-31566.patch: symbolic links followed when changing modes, times, ACLs and flags while extracting an archive - CVE-2021-31566 * SECURITY UPDATE: NULL pointer dereference when calloc() fails while allocating a write filter - debian/patches/CVE-2022-36227.patch: NULL pointer dereference when calloc() fails while allocating a write filter - CVE-2022-36227 * SECURITY UPDATE: integer overflow in the RAR4 reader allowing an oversized memcpy in copy_from_lzss_window() - debian/patches/CVE-2024-20696.patch: integer overflow in the RAR4 reader allowing an oversized memcpy in copy_from_lzss_window() - CVE-2024-20696 * SECURITY UPDATE: LZSS window size mismatch after a PPMd block in the RAR4 reader allowing an out-of-bounds read - debian/patches/CVE-2026-4424.patch: LZSS window size mismatch after a PPMd block in the RAR4 reader allowing an out-of-bounds read - CVE-2026-4424 * SECURITY UPDATE: unvalidated zisofs block size exponent in the ISO9660 Rock Ridge ZF parser - debian/patches/CVE-2026-5121.patch: unvalidated zisofs block size exponent in the ISO9660 Rock Ridge ZF parser - CVE-2026-5121 * SECURITY UPDATE: double free in the RAR4 reader with o",
    "evidence": "osv:CLSA-2026-1787908647",
    "products": [
      {
        "name": {
          "value": "bsdcpio",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.2.2-3.1ubuntu0.7+tuxcare.els1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "bsdtar",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.2.2-3.1ubuntu0.7+tuxcare.els1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libarchive-dev",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.2.2-3.1ubuntu0.7+tuxcare.els1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libarchive-tools",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.2.2-3.1ubuntu0.7+tuxcare.els1",
            "evidence": "/affected/3/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libarchive13",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.2.2-3.1ubuntu0.7+tuxcare.els1",
            "evidence": "/affected/4/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1787908647",
      "aliases": [
        "CLSA-2026-1787908647"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.2.2-3.1ubuntu0.7+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "bsdcpio",
            "purl": "pkg:deb/tuxcare/bsdcpio?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787908647.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.2.2-3.1ubuntu0.7+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "bsdtar",
            "purl": "pkg:deb/tuxcare/bsdtar?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787908647.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.2.2-3.1ubuntu0.7+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "libarchive-dev",
            "purl": "pkg:deb/tuxcare/libarchive-dev?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787908647.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.2.2-3.1ubuntu0.7+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "libarchive-tools",
            "purl": "pkg:deb/tuxcare/libarchive-tools?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787908647.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.2.2-3.1ubuntu0.7+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "libarchive13",
            "purl": "pkg:deb/tuxcare/libarchive13?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787908647.json"
          }
        }
      ],
      "modified": "2026-10-26T09:43:54.435048564Z",
      "provider": "osv",
      "upstream": [
        "CVE-2021-23177",
        "CVE-2021-31566",
        "CVE-2022-36227",
        "CVE-2024-20696",
        "CVE-2025-25724",
        "CVE-2025-5914",
        "CVE-2026-4424",
        "CVE-2026-5121"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2026-1787908647.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2021-23177",
        "https://nvd.nist.gov/vuln/detail/CVE-2021-31566",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-36227",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-20696",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-25724",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-5914",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-4424",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-5121"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2021-23177",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2021-31566",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2022-36227",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2024-20696",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2025-25724",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2025-5914",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-4424",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-5121",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 450233,
  "published_at": "2026-08-28T09:17:42+00:00"
}