coreutils: Fix of CVE-2026-56392

{
  "id": "ddb46d31c07410fc7cc3df4e9f5b6cf6f9d6d0a1d77998d4a668a31271921480",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1788177078",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "coreutils: Fix of CVE-2026-56392",
    "summary": "- CVE-2026-56392: fix heap buffer overflow in unexpand caused by an integer overflow when allocating the pending-blank buffer for large -t values (backport of upstream b60a159f and follow-up 4ade9cf7)",
    "evidence": "osv:CLSA-2026-1788177078",
    "products": [
      {
        "name": {
          "value": "coreutils",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "8.32-39.el9.tuxcare.els2",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "coreutils-common",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "8.32-39.el9.tuxcare.els2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "coreutils-single",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "8.32-39.el9.tuxcare.els2",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1788177078",
      "aliases": [
        "CLSA-2026-1788177078"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8.32-39.el9.tuxcare.els2"
                }
              ]
            }
          ],
          "package": {
            "name": "coreutils",
            "purl": "pkg:rpm/tuxcare/coreutils?distro=almalinux-9.6",
            "ecosystem": "TuxCare:AlmaLinux:9.6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1788177078.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8.32-39.el9.tuxcare.els2"
                }
              ]
            }
          ],
          "package": {
            "name": "coreutils-common",
            "purl": "pkg:rpm/tuxcare/coreutils-common?distro=almalinux-9.6",
            "ecosystem": "TuxCare:AlmaLinux:9.6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1788177078.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8.32-39.el9.tuxcare.els2"
                }
              ]
            }
          ],
          "package": {
            "name": "coreutils-single",
            "purl": "pkg:rpm/tuxcare/coreutils-single?distro=almalinux-9.6",
            "ecosystem": "TuxCare:AlmaLinux:9.6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1788177078.json"
          }
        }
      ],
      "modified": "2026-10-26T09:31:29.648154301Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-56392"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1788177078.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-56392"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-56392",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 447699,
  "published_at": "2026-08-31T11:51:29+00:00"
}