libarchive: Fix of 2 CVEs

{
  "id": "9b00fac1a543f66997cf037d6dfd37f57a402acc4efa98fd37c127888e178a90",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1792818643",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "libarchive: Fix of 2 CVEs",
    "summary": "- CVE-2021-23177: fix extraction of ACLs to the symlink target instead of the link - CVE-2021-31566: do not follow symlinks when fixing up permissions and file flags - CVE-2026-5121: validate pz_log2_bs in the iso9660 zisofs reader",
    "evidence": "osv:CLSA-2026-1792818643",
    "products": [
      {
        "name": {
          "value": "libarchive",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.8.3-7.el6_8.tuxcare.els1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libarchive-devel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.8.3-7.el6_8.tuxcare.els1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1792818643",
      "aliases": [
        "CLSA-2026-1792818643"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.8.3-7.el6_8.tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "libarchive",
            "purl": "pkg:rpm/tuxcare/libarchive?distro=oraclelinux-6",
            "ecosystem": "TuxCare:OracleLinux:6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux6els/CLSA-2026-1792818643.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.8.3-7.el6_8.tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "libarchive-devel",
            "purl": "pkg:rpm/tuxcare/libarchive-devel?distro=oraclelinux-6",
            "ecosystem": "TuxCare:OracleLinux:6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux6els/CLSA-2026-1792818643.json"
          }
        }
      ],
      "modified": "2026-10-26T09:31:53.775116996Z",
      "provider": "osv",
      "upstream": [
        "CVE-2021-23177",
        "CVE-2021-31566",
        "CVE-2026-5121"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/oraclelinux6els/CLSA-2026-1792818643.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2021-23177",
        "https://nvd.nist.gov/vuln/detail/CVE-2021-31566"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2021-23177",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2021-31566",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-5121",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 448882,
  "published_at": "2026-10-24T05:10:55+00:00"
}