rsync: Fix of 7 CVEs

{
  "id": "a81fdf2a55d496f9be71c6c2cc3c3be96f761188dfe041525ca21830d6fe6a46",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1789783256",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "rsync: Fix of 7 CVEs",
    "summary": "- CVE-2026-70456: reserve the slot read_args() needs for its trailing NULL, so a peer argument count landing exactly on maxargs cannot write one pointer past the argv allocation - CVE-2026-70458: refuse FLAG_HLINKED when hard links are not in use and on a directory entry, so a peer cannot displace the checksum slot through hard-link extras that were never reserved; also set sender_keeps_checksum in the daemon-as-sender path, and skip the content-based basis match for a hard-linked non-regular file, so %C and --compare-dest cannot read a checksum slot that was never allocated - CVE-2026-70462: reject a non-positive MSG_IO_TIMEOUT from the peer and cap it at 24 hours, and make set_io_timeout()'s arithmetic overflow-safe, so a crafted server can neither disable the client's --timeout nor spin it at 100% CPU on a negative select() timeout - CVE-2026-70453: bound the hash_search() chain walk at MAX_CHAIN_LEN, so a basis file whose weak checksums all collide cannot drive an O(file_size * chain_length) scan - CVE-2026-53785: create each implied parent directory through do_mkdir_at() against a held O_NOFOLLOW directory fd, and widen that wrapper's gate from a non-chrooted daemon to any non-chrooted receiver as upstream does, so a parent component raced into a symlink can no longer place --relative directories outside the destination over ssh either - CVE-2026-53794: reject --max-alloc=0, which disabled the per-allocation size cap entirely instead of enforcing a zero one - CVE-2026-53",
    "evidence": "osv:CLSA-2026-1789783256",
    "products": [
      {
        "name": {
          "value": "rsync",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.2.5-3.el9_6.tuxcare.els18",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "rsync-daemon",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.2.5-3.el9_6.tuxcare.els18",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "rsync-rrsync",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.2.5-3.el9_6.tuxcare.els18",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1789783256",
      "aliases": [
        "CLSA-2026-1789783256"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.2.5-3.el9_6.tuxcare.els18"
                }
              ]
            }
          ],
          "package": {
            "name": "rsync",
            "purl": "pkg:rpm/tuxcare/rsync?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-2026-1789783256.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.2.5-3.el9_6.tuxcare.els18"
                }
              ]
            }
          ],
          "package": {
            "name": "rsync-daemon",
            "purl": "pkg:rpm/tuxcare/rsync-daemon?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-2026-1789783256.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.2.5-3.el9_6.tuxcare.els18"
                }
              ]
            }
          ],
          "package": {
            "name": "rsync-rrsync",
            "purl": "pkg:rpm/tuxcare/rsync-rrsync?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-2026-1789783256.json"
          }
        }
      ],
      "modified": "2026-10-26T09:43:41.062984326Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-53785",
        "CVE-2026-53790",
        "CVE-2026-53794",
        "CVE-2026-70453",
        "CVE-2026-70456",
        "CVE-2026-70458",
        "CVE-2026-70462"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1789783256.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-53785",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-53790",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-53794",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-70453",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-70456",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-70458",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-70462"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-53785",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-53790",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-53794",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-70453",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-70456",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-70458",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-70462",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 450072,
  "published_at": "2026-09-19T02:01:14+00:00"
}