{
  "cveId": "CVE-2026-43620",
  "url": "https://patchblox.com/security/cve/CVE-2026-43620",
  "summary": "CVE-2026-43620 is fixed in 4 products on 1 platform, first by rsync 3.1.2-2.1ubuntu1.6\u002Besm3, released May 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Rsync \u003C 3.4.3 Out-of-Bounds Array Read via recv_files()",
  "description": "Rsync version\u00A03.4.2 and prior contain a receiver-side out-of-bounds array read vulnerability in recv_files() in receiver.c that allows a malicious rsync server to crash the rsync client process. Attackers can exploit the vulnerability by setting CF_INC_RECURSE in compatibility flags and sending a specially crafted file list where the first sorted entry is not the leading dot directory, followed by a transfer record with ndx=0 and an iflag word without ITEM_TRANSFER, causing the receiver to read 8 bytes before the allocated pointer array and dereference an invalid pointer at an unmapped address, resulting in a deterministic SIGSEGV crash of the rsync client.",
  "published": "2026-05-19T17:00:00Z",
  "severity": "Moderate",
  "cvss": 6.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
  "cwe": "Out-of-bounds Read",
  "epss": 0.00428,
  "epssPercentile": 0.37267,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43620",
  "fixes": [
    {
      "platform": "linux",
      "product": "rsync",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "3.2.7-1\u002Bdeb12u5",
      "fix": "DEBIAN-CVE-2026-43620",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-43620",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "3.4.1\u002Bds1-5\u002Bdeb13u3",
      "fix": "DEBIAN-CVE-2026-43620",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-43620",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "Debian 14",
      "fixedVersion": "3.4.3\u002Bds1-1",
      "fix": "DEBIAN-CVE-2026-43620",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-43620",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.1.2-2.1ubuntu1.6\u002Besm3",
      "fix": "rsync 3.1.2-2.1ubuntu1.6\u002Besm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-rsync-3.1.2-2.1ubuntu1.6-esm3",
      "released": "2026-05-19T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.1.3-8ubuntu0.9\u002Besm1",
      "fix": "rsync 3.1.3-8ubuntu0.9\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-rsync-3.1.3-8ubuntu0.9-esm1",
      "released": "2026-05-19T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "3.2.7-0ubuntu0.22.04.6",
      "fix": "rsync 3.2.7-0ubuntu0.22.04.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-rsync-3.2.7-0ubuntu0.22.04.6",
      "released": "2026-05-27T17:38:24Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.2.7-1ubuntu1.4",
      "fix": "rsync 3.2.7-1ubuntu1.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-rsync-3.2.7-1ubuntu1.4",
      "released": "2026-05-27T17:38:28Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "3.4.1\u002Bds1-5ubuntu1.2",
      "fix": "rsync 3.4.1\u002Bds1-5ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-rsync-3.4.1-ds1-5ubuntu1.2",
      "released": "2026-05-27T17:38:31Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.4.1\u002Bds1-7ubuntu0.2",
      "fix": "rsync 3.4.1\u002Bds1-7ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-rsync-3.4.1-ds1-7ubuntu0.2",
      "released": "2026-05-19T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "amzn 2023",
      "fixedVersion": "3.5.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3131",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3131",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.4.1-160000.6.1",
      "fix": "OPENSUSE-SU-2026:21650-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21650-1",
      "released": "2026-08-26T12:30:55Z"
    },
    {
      "platform": "linux",
      "product": "rsync",
      "release": "sles 16.0",
      "fixedVersion": "3.4.1-160000.6.1",
      "fix": "SUSE-SU-2026:23323-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-23323-1",
      "released": "2026-08-26T12:30:35Z"
    },
    {
      "platform": "linux",
      "product": "rsync-daemon",
      "release": "amzn 2023",
      "fixedVersion": "3.5.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3131",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3131",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "3.5.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3131",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3131",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rsync-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "3.5.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3131",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3131",
      "released": "2026-09-28T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}