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CVE-2026-44034— Heap out-of-bounds read in DCMTK RLE decodeFrame()

Quick assessment

Affected
OFFIS DCMTK
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OFFIS DCMTK 3.7.0 中 dcmdata/libsrc/dcrleccd.cc 文件的 DcmRLECodecDecoder::decodeFrame() 函数存在基于堆的越界读取漏洞。攻击者可通过构造特定的 RLE 无损 DICOM 文件（其像素数据片段长度短于 64 字节的 RLE 头部长度），读取最多 63 字节的相邻堆内存，或导致程序崩溃。该函数在未检查片段长度的情况下复制 64 字节数据，而同一模块中的兄弟函数 decode() 已具备此类长度检查机制。采用逐帧方式解码 RLE 图像的应用程

CVSS 4.4 · Medium

Possible ATT&CK Techniques 1 AI

T1200 · Hardware Additions

Affected Version Matrix 1

VendorProduct Version RangeStatus
OFFIS DCMTK 3.7.0 affected
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I. Basic Information for CVE-2026-44034

Vulnerability Information
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Vulnerability Title
Heap out-of-bounds read in DCMTK RLE decodeFrame()
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
OFFIS DCMTK 3.7.0 cpe:2.3:a:offis:dcmtk:3.7.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-44034

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III. Intelligence Information for CVE-2026-44034

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Patches & Fixes for CVE-2026-44034 (1)

Vendor Pages for CVE-2026-44034 (1)

Same Patch Batch · OFFIS · 2026-10-08 · 7 CVEs total

CVE-2026-44031 7.5 HIGH Uncontrolled recursion in the DCMTK DICOM dataset parser allows unauthenticated remote den
CVE-2026-44037 5.5 MEDIUM Uncontrolled recursion in DCMTK JSON reader allows denial of service
CVE-2026-44035 5.5 MEDIUM Uncontrolled recursion in DCMTK DICOMDIR parsing allows denial of service
CVE-2026-44036 5.5 MEDIUM Uncontrolled recursion in DCMTK xml2dcm allows denial of service
CVE-2026-44033 5.5 MEDIUM Uncontrolled recursion in the DCMTK bundled XML parser allows denial of service
CVE-2026-44038 4.4 MEDIUM Global buffer out-of-bounds read in DCMTK JPEG Huffman decoding

IV. Related Vulnerabilities

Same product: DCMTK
Same vendor: OFFIS
Same weakness: CWE-125

V. Comments for CVE-2026-44034

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