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Medium

Security advisory

Type: advisorySources: OSVCVE: CVE-2026-44034

A heap-based out-of-bounds read in DcmRLECodecDecoder::decodeFrame() in dcmdata/libsrc/dcrleccd.cc of OFFIS DCMTK 3.7.0 allows an attacker to read up to 63 bytes of adjacent heap memory, or cause a crash, via a crafted RLE Lossless DICOM file whose pixel data fragment is shorter than the 64-byte RLE header. The function copies 64 bytes without checking the fragment length, a check that the sibling function decode() already performs. Applications that decode RLE images frame by frame (for example, through DcmPixelData::getUncompressedFrame()) are affected. The dcmdrle command-line tool uses decode() and is not affected. The issue is fixed in commit 45469f3c30037e9c7159290e4bb74cd7b3b9ef1d.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-44034
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 13:03 UTC · Revision 1

Source evidence

CVE-2026-44034

core-osv · Original source

Published 8 Oct 2026, 13:17 UTC

A heap-based out-of-bounds read in DcmRLECodecDecoder::decodeFrame() in dcmdata/libsrc/dcrleccd.cc of OFFIS DCMTK 3.7.0 allows an attacker to read up to 63 bytes of adjacent heap memory, or cause a crash, via a crafted RLE Lossless DICOM file whose pixel data fragment is shorter than the 64-byte RLE header. The function copies 64 bytes without checking the fragment length, a check that the sibling function decode() already performs. Applications that decode RLE images frame by frame (for example, through DcmPixelData::getUncompressedFrame()) are affected. The dcmdrle command-line tool uses decode() and is not affected. The issue is fixed in commit 45469f3c30037e9c7159290e4bb74cd7b3b9ef1d.

osv:CVE-2026-44034
Complete source record
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  "url": "https://osv.dev/vulnerability/CVE-2026-44034",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-44034",
    "summary": "A heap-based out-of-bounds read in DcmRLECodecDecoder::decodeFrame() in dcmdata/libsrc/dcrleccd.cc of OFFIS DCMTK 3.7.0 allows an attacker to read up to 63 bytes of adjacent heap memory, or cause a crash, via a crafted RLE Lossless DICOM file whose pixel data fragment is shorter than the 64-byte RLE header. The function copies 64 bytes without checking the fragment length, a check that the sibling function decode() already performs. Applications that decode RLE images frame by frame (for example, through DcmPixelData::getUncompressedFrame()) are affected. The dcmdrle command-line tool uses decode() and is not affected. The issue is fixed in commit 45469f3c30037e9c7159290e4bb74cd7b3b9ef1d.",
    "evidence": "osv:CVE-2026-44034",
    "products": [],
    "severity": "medium",
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      "aliases": [
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          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
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          "database_specific": {
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            "vanir_signatures": [
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                "source": "https://github.com/dcmtk/dcmtk/commit/45469f3c30037e9c7159290e4bb74cd7b3b9ef1d",
                "target": {
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                  "function": "DcmRLECodecDecoder::decodeFrame"
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                "signature_type": "Function",
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                "source": "https://github.com/dcmtk/dcmtk/commit/45469f3c30037e9c7159290e4bb74cd7b3b9ef1d",
                "target": {
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            "vanir_signatures_modified": "2026-10-20T17:21:11Z"
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      ],
      "modified": "2026-10-20T17:21:11.371864770Z",
      "provider": "osv",
      "references": [
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  "source_id": "core-osv",
  "document_id": 389774,
  "published_at": "2026-10-08T13:17:17.347+00:00"
}