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DEBIAN-CVE-2026-29518

Type: advisorySource: OSV1 source record

Rsync versions before 3.4.3 contain a time-of-check to time-of-use (TOCTOU) race condition in daemon file handling that allows attackers to redirect file writes outside intended directories by replacing parent directory components with symbolic links. Attackers with write access to a module path can exploit this race condition to create or overwrite arbitrary files, potentially modifying sensitive system files and achieving privilege escalation when the daemon runs with elevated privileges. This vulnerability can only be triggered if the chroot setting is false.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-29518

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-29518

rsync

Source reference: /affected/0/package/name

Affected versions
3.2.7-1

Source reference: /affected/0/versions

3.2.7-1+deb12u1

Source reference: /affected/0/versions

3.2.7-1+deb12u2

Source reference: /affected/0/versions

3.2.7-1+deb12u3

Source reference: /affected/0/versions

3.2.7-1+deb12u4

Source reference: /affected/0/versions

Fixed versions
3.2.7-1+deb12u5

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

rsync

Source reference: /affected/1/package/name

Affected versions
3.4.1+ds1-5

Source reference: /affected/1/versions

3.4.1+ds1-5+deb13u1

Source reference: /affected/1/versions

3.4.1+ds1-5+deb13u2

Source reference: /affected/1/versions

Fixed versions
3.4.1+ds1-5+deb13u3

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

rsync

Source reference: /affected/2/package/name

Affected versions
3.4.1+ds1-5

Source reference: /affected/2/versions

3.4.1+ds1-6

Source reference: /affected/2/versions

3.4.1+ds1-7

Source reference: /affected/2/versions

3.4.1+ds1-8~exp1

Source reference: /affected/2/versions

3.4.2+ds1-1

Source reference: /affected/2/versions

3.4.2+ds1-2

Source reference: /affected/2/versions

Fixed versions
3.4.3+ds1-1

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.2.7-1+deb12u5"
          }
        ]
      }
    ],
    "package": {
      "name": "rsync",
      "purl": "pkg:deb/debian/rsync?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "3.2.7-1",
      "3.2.7-1+deb12u1",
      "3.2.7-1+deb12u2",
      "3.2.7-1+deb12u3",
      "3.2.7-1+deb12u4"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-29518.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.4.1+ds1-5+deb13u3"
          }
        ]
      }
    ],
    "package": {
      "name": "rsync",
      "purl": "pkg:deb/debian/rsync?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.4.1+ds1-5",
      "3.4.1+ds1-5+deb13u1",
      "3.4.1+ds1-5+deb13u2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-29518.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.4.3+ds1-1"
          }
        ]
      }
    ],
    "package": {
      "name": "rsync",
      "purl": "pkg:deb/debian/rsync?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.4.1+ds1-5",
      "3.4.1+ds1-6",
      "3.4.1+ds1-7",
      "3.4.1+ds1-8~exp1",
      "3.4.2+ds1-1",
      "3.4.2+ds1-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-29518.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#57485 · Revision 1
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Publisher date
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