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DEBIAN-CVE-2026-43618

Type: advisorySource: OSV1 source record

Rsync version 3.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigger an overflow that causes the receiver process to read and return data from outside the intended buffer bounds. Attackers can exploit this vulnerability to disclose process memory contents including environment variables, passwords, heap and stack data, and library memory pointers, significantly reducing ASLR effectiveness and facilitating further exploitation.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-43618

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-2026-43618

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-2026-43618.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-2026-43618.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-2026-43618.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#57683 · Revision 1
Added to Heist Feed
Publisher date
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