{
  "cveId": "CVE-2026-44510",
  "url": "https://patchblox.com/security/cve/CVE-2026-44510",
  "summary": "CVE-2026-44510 is fixed in rsync on 1 platform, first by DEBIAN-CVE-2026-44510, released July 21, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "rsync: Rsync is a file-copying tool that uses a delta-transfer algorithm to synchronize remote and local files",
  "description": "Rsync is a file-copying tool that uses a delta-transfer algorithm to synchronize remote and local files. In versions prior to 3.4.3, the receiver-side out-of-bounds array read in rsync\u0027s recv_files() lets a malicious rsync server (or any peer acting in the sender role) deterministically crash any rsync client that pulls from it. The trigger is fully wire-protocol-level, requires no special options on the victim, and works for both rsync:// URLs and remote-shell pulls; since inc_recurse is the protocol-30\u002B default, any client doing a normal recursive pull against an attacker-controlled URL is exposed. A malicious server sets CF_INC_RECURSE, sends a flist whose first sorted entry is not the leading \u0022.\u0022 directory (causing parent_ndx to be set to -1), then sends a transfer record with ndx = 0 and an iflag omitting ITEM_TRANSFER, causing the receiver to read 8 bytes before the allocated pointer array and dereference the result in f_name(). The impact is crash-only: the out-of-bounds read lands in glibc mmap chunk metadata and dereferences to an unmapped low address, producing a SEGV that cannot be leveraged into an exploit (confirmed on glibc x86-64 Linux; non-glibc allocators not audited). This issue is fixed in version 3.4.3.",
  "published": "2026-07-20T22:17:13Z",
  "severity": "medium",
  "cvss": 6.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "rsync",
      "release": "Debian 14",
      "fixedVersion": "3.4.3\u002Bds1-1",
      "fix": "DEBIAN-CVE-2026-44510",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-44510",
      "released": "2026-07-21T13:06:52Z"
    },
    {
      "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"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}