Fix CVE(s): CVE-2026-34180, CVE-2026-42766, CVE-2026-7383, CVE-2026-9076

{
  "id": "bf77a6f600177aac4777dd5d01c77b11894a661a67abcf68018f13490b4c8e3c",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1781549242",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Fix CVE(s): CVE-2026-34180, CVE-2026-42766, CVE-2026-7383, CVE-2026-9076",
    "summary": "* SECURITY UPDATE: Heap buffer overflow in ASN1_mbstring_ncopy() where the destination length for BMPSTRING and UNIVERSALSTRING output is computed by a signed left shift that can overflow int, producing an undersized allocation followed by out-of-bounds writes for oversized attacker-controlled inputs reaching ASN1_mbstring_copy() or ASN1_mbstring_ncopy() directly. - debian/patches/CVE-2026-7383.patch: reject oversized inputs before the shifts and in out_utf8() in crypto/asn1/a_mbstr.c. - CVE-2026-7383 * SECURITY UPDATE: Out-of-bounds read in kek_unwrap_key() check-byte validation when a CMS PasswordRecipientInfo uses a KEK cipher with a block size smaller than 4 octets, making the decrypted buffer smaller than the seven octets the check-byte test reads. - debian/patches/CVE-2026-9076.patch: reject blocklen < 4 and oversized inlen in kek_unwrap_key() in crypto/cms/cms_pwri.c. - CVE-2026-9076 * SECURITY UPDATE: Heap buffer over-read in ASN.1 content parsing: the long content length was truncated to int in asn1_ex_c2i(), so ASN1_STRING_set() could be called with an inconsistent length. - debian/patches/CVE-2026-34180.patch: pass the length as long in asn1_ex_c2i() and reject lengths not representable as int in crypto/asn1/tasn_dec.c. - CVE-2026-34180 * SECURITY UPDATE: NULL pointer dereference when processing CMS PasswordRecipientInfo with the optional keyDerivationAlgorithm field absent, allowing a denial of service via crafted CMS messages. - debian/patches/CVE-2026-42766.patc",
    "evidence": "osv:CLSA-2026-1781549242",
    "products": [
      {
        "name": {
          "value": "libssl-dev",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.1.1f-1ubuntu2.24+tuxcare.els7",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libssl-doc",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.1.1f-1ubuntu2.24+tuxcare.els7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libssl1.1",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.1.1f-1ubuntu2.24+tuxcare.els7",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "openssl",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.1.1f-1ubuntu2.24+tuxcare.els7",
            "evidence": "/affected/3/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1781549242",
      "aliases": [
        "CLSA-2026-1781549242"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.1.1f-1ubuntu2.24+tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "libssl-dev",
            "purl": "pkg:deb/tuxcare/libssl-dev?distro=ubuntu-20.04",
            "ecosystem": "TuxCare:Ubuntu:20.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1781549242.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.1.1f-1ubuntu2.24+tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "libssl-doc",
            "purl": "pkg:deb/tuxcare/libssl-doc?distro=ubuntu-20.04",
            "ecosystem": "TuxCare:Ubuntu:20.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1781549242.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.1.1f-1ubuntu2.24+tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "libssl1.1",
            "purl": "pkg:deb/tuxcare/libssl1.1?distro=ubuntu-20.04",
            "ecosystem": "TuxCare:Ubuntu:20.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1781549242.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.1.1f-1ubuntu2.24+tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "openssl",
            "purl": "pkg:deb/tuxcare/openssl?distro=ubuntu-20.04",
            "ecosystem": "TuxCare:Ubuntu:20.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1781549242.json"
          }
        }
      ],
      "modified": "2026-10-26T09:32:05.233937197Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-34180",
        "CVE-2026-42766",
        "CVE-2026-7383",
        "CVE-2026-9076"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/ubuntu20.04els/CLSA-2026-1781549242.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-34180",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-42766",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-7383",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-9076"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-34180",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-42766",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-7383",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-9076",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 449676,
  "published_at": "2026-06-15T18:52:46+00:00"
}