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DEBIAN-CVE-2026-45699

Type: advisorySource: OSV1 source record

Netatalk is a Free and Open Source file server suite for Unix-like operating systems. In versions 3.1.19 through 4.4.2, a stack-based buffer overflow exists in the copydir() function of Netatalk's afpd daemon due to an integer underflow in the calculation of the remaining buffer size used for path construction. copydir() is a utility function called when a file operation crosses a device boundary inside an AFP shared volume, which the standard library's renameat() cannot handle. The function attempts to track available buffer space using srem and drem for source and destination paths. Incorrect arithmetic causes both srem and drem to underflow to SIZE_MAX. Consequently, boundary checks against strlen(de->d_name) always pass, allowing strcpy() to append filenames into nearly full stack buffers. Version 4.4.3 patches the issue. As a workaround, configure each AFP shared volume to be structured as a single file system, in other words no subdirectory of a shared volume should be a mount point for a different file system.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-45699

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-2026-45699

netatalk

Source reference: /affected/0/package/name

Affected versions
4.2.3~ds-1

Source reference: /affected/0/versions

4.2.3~ds-1+deb13u1

Source reference: /affected/0/versions

Fixed versions
4.2.3~ds-1+deb13u2

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

netatalk

Source reference: /affected/1/package/name

Affected versions
4.2.3~ds-1

Source reference: /affected/1/versions

4.2.3~ds-2

Source reference: /affected/1/versions

4.2.3~ds-2.1

Source reference: /affected/1/versions

4.4.1~ds-1

Source reference: /affected/1/versions

4.4.2~ds-1

Source reference: /affected/1/versions

Fixed versions
4.4.3~ds-1

Source reference: /affected/1/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": "4.2.3~ds-1+deb13u2"
          }
        ]
      }
    ],
    "package": {
      "name": "netatalk",
      "purl": "pkg:deb/debian/netatalk?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "4.2.3~ds-1",
      "4.2.3~ds-1+deb13u1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-45699.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "4.4.3~ds-1"
          }
        ]
      }
    ],
    "package": {
      "name": "netatalk",
      "purl": "pkg:deb/debian/netatalk?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "4.2.3~ds-1",
      "4.2.3~ds-2",
      "4.2.3~ds-2.1",
      "4.4.1~ds-1",
      "4.4.2~ds-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-45699.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#57095 · Revision 1
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Publisher date
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