alsa-2026:26203
Vulnerability from osv_almalinux
Published
2026-06-16 00:00
Modified
2026-07-02 10:54
Summary
Important: postgresql:16 security update
Details

PostgreSQL is an advanced object-relational database management system (DBMS).

Security Fix(es):

  • postgresql: PostgreSQL: Operating system account hijack via symlink following in pg_basebackup and pg_rewind (CVE-2026-6475)
  • postgresql: PostgreSQL libpq: Buffer overflow allows server superuser to overwrite client stack memory (CVE-2026-6477)
  • postgresql: PostgreSQL: Credential recovery via covert timing channel in MD5 password comparison (CVE-2026-6478)
  • postgresql: integer overflow can cause an undersized allocation and an out-of-bounds write (CVE-2026-6473)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "pg_repack"
      },
      "ranges": [
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            {
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            {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
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        "ecosystem": "AlmaLinux:9",
        "name": "pgaudit"
      },
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              "introduced": "0"
            },
            {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "pgvector"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
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            }
          ],
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      ]
    },
    {
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        "name": "postgis"
      },
      "ranges": [
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          "events": [
            {
              "introduced": "0"
            },
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            }
          ],
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      ]
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    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "postgis-client"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
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            }
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        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "postgis-docs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
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    {
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        {
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    {
      "package": {
        "ecosystem": "AlmaLinux:9",
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        {
          "events": [
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      "package": {
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        "name": "postgres-decoderbufs"
      },
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            {
              "introduced": "0"
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          ],
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        "name": "postgresql"
      },
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    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
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      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
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        "ecosystem": "AlmaLinux:9",
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      },
      "ranges": [
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            {
              "introduced": "0"
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            {
              "fixed": "16.14-1.module_el9.8.0+266+1e661e97"
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          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "postgresql-plperl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "16.14-1.module_el9.8.0+266+1e661e97"
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          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "postgresql-plpython3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
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            {
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            }
          ],
          "type": "ECOSYSTEM"
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    },
    {
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        "ecosystem": "AlmaLinux:9",
        "name": "postgresql-pltcl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "16.14-1.module_el9.8.0+266+1e661e97"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "postgresql-private-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "16.14-1.module_el9.8.0+266+1e661e97"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "postgresql-private-libs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "16.14-1.module_el9.8.0+266+1e661e97"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "postgresql-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "16.14-1.module_el9.8.0+266+1e661e97"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "postgresql-server-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
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          "type": "ECOSYSTEM"
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      "ranges": [
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            {
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          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "postgresql-test"
      },
      "ranges": [
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          "events": [
            {
              "introduced": "0"
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "postgresql-test-rpm-macros"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
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            {
              "fixed": "16.14-1.module_el9.8.0+266+1e661e97"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "postgresql-upgrade"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "16.14-1.module_el9.8.0+266+1e661e97"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "postgresql-upgrade-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "PostgreSQL is an advanced object-relational database management system (DBMS).  \n\nSecurity Fix(es):  \n\n  * postgresql: PostgreSQL: Operating system account hijack via symlink following in pg_basebackup and pg_rewind (CVE-2026-6475)\n  * postgresql: PostgreSQL libpq: Buffer overflow allows server superuser to overwrite client stack memory (CVE-2026-6477)\n  * postgresql: PostgreSQL: Credential recovery via covert timing channel in MD5 password comparison (CVE-2026-6478)\n  * postgresql: integer overflow can cause an undersized allocation and an out-of-bounds write (CVE-2026-6473)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:26203",
  "modified": "2026-07-02T10:54:20Z",
  "published": "2026-06-16T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:26203"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-6473"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-6475"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-6477"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-6478"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2477439"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2477442"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2477447"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2477448"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/9/ALSA-2026-26203.html"
    }
  ],
  "related": [
    "CVE-2026-6475",
    "CVE-2026-6477",
    "CVE-2026-6478",
    "CVE-2026-6473"
  ],
  "summary": "Important: postgresql:16 security update"
}


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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.

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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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.