freerdp: Fix of 6 CVEs

{
  "id": "f861f8202a4f29cac802ac561b04f27bfd8f15f64677127bdbc1b8e50b533720",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1791568721",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "freerdp: Fix of 6 CVEs",
    "summary": "- CVE-2026-91953, CVE-2026-91964: bound every write in nego_send_negotiation_request() with Stream_EnsureRemainingCapacity(); the routing token taken from the server's LB_LOAD_BALANCE_INFO was written into a fixed 512 byte stream unchecked, overflowing the heap allocation - CVE-2026-91963: allocate wStream buffers with calloc() instead of malloc(), so the urbdrc completion path can no longer return the untouched tail of a freshly allocated buffer - and with it live heap pointers - to the server when a USB transfer returns short - CVE-2026-91959: require four remaining bytes in rts_read_result() before reading result and reason; a malicious RD Gateway could end a BIND_ACK fragment two bytes into a result and make the parser over-read it - CVE-2026-91957: do not free the SMARTCARD_DEVICE on the DeviceServiceEntry() failure path once RegisterDevice() has succeeded; devman kept the freed pointer and dereferenced DEVICE.Free through it on channel teardown - CVE-2026-91956: bound the interface, alternate-setting and endpoint indices in func_get_ep_desc(); it indexed by array position while the validator indexed by InterfaceNumber, so a permuted descriptor produced an out-of-bounds read of a pointer that was then dereferenced",
    "evidence": "osv:CLSA-2026-1791568721",
    "products": [
      {
        "name": {
          "value": "freerdp",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.1.1-5.0.9.el7_9.tuxcare.els5",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "freerdp-devel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.1.1-5.0.9.el7_9.tuxcare.els5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "freerdp-libs",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.1.1-5.0.9.el7_9.tuxcare.els5",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libwinpr",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.1.1-5.0.9.el7_9.tuxcare.els5",
            "evidence": "/affected/3/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libwinpr-devel",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.1.1-5.0.9.el7_9.tuxcare.els5",
            "evidence": "/affected/4/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1791568721",
      "aliases": [
        "CLSA-2026-1791568721"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.1.1-5.0.9.el7_9.tuxcare.els5"
                }
              ]
            }
          ],
          "package": {
            "name": "freerdp",
            "purl": "pkg:rpm/tuxcare/freerdp?distro=centos-7",
            "ecosystem": "TuxCare:CentOS:7"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos7els/CLSA-2026-1791568721.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.1.1-5.0.9.el7_9.tuxcare.els5"
                }
              ]
            }
          ],
          "package": {
            "name": "freerdp-devel",
            "purl": "pkg:rpm/tuxcare/freerdp-devel?distro=centos-7",
            "ecosystem": "TuxCare:CentOS:7"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos7els/CLSA-2026-1791568721.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.1.1-5.0.9.el7_9.tuxcare.els5"
                }
              ]
            }
          ],
          "package": {
            "name": "freerdp-libs",
            "purl": "pkg:rpm/tuxcare/freerdp-libs?distro=centos-7",
            "ecosystem": "TuxCare:CentOS:7"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos7els/CLSA-2026-1791568721.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.1.1-5.0.9.el7_9.tuxcare.els5"
                }
              ]
            }
          ],
          "package": {
            "name": "libwinpr",
            "purl": "pkg:rpm/tuxcare/libwinpr?distro=centos-7",
            "ecosystem": "TuxCare:CentOS:7"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos7els/CLSA-2026-1791568721.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.1.1-5.0.9.el7_9.tuxcare.els5"
                }
              ]
            }
          ],
          "package": {
            "name": "libwinpr-devel",
            "purl": "pkg:rpm/tuxcare/libwinpr-devel?distro=centos-7",
            "ecosystem": "TuxCare:CentOS:7"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos7els/CLSA-2026-1791568721.json"
          }
        }
      ],
      "modified": "2026-10-26T09:43:21.843402422Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-91953",
        "CVE-2026-91956",
        "CVE-2026-91957",
        "CVE-2026-91959",
        "CVE-2026-91963",
        "CVE-2026-91964"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/centos7els/CLSA-2026-1791568721.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-91953",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-91956",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-91957",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-91959",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-91963",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-91964"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-91953",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-91956",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-91957",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-91959",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-91963",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-91964",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 449860,
  "published_at": "2026-10-09T17:58:57+00:00"
}