Heap out-of-bounds read in DCMTK RLE decodeFrame()
Summary
| CVE | CVE-2026-44034 |
|---|---|
| State | PUBLISHED |
| Assigner | securin |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-08 13:17:17 UTC |
| Updated | 2026-10-08 21:10:00 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 4.8 MEDIUM from 33c584b5-0579-4c06-b2a0-8d8329fcab9c
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
EPSS: 0.001070000 probability, percentile 0.010750000 (date 2026-10-10)
Problem Types: CWE-125 | CWE-125 CWE-125 Out-of-bounds Read
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | 33c584b5-0579-4c06-b2a0-8d8329fcab9c | Secondary | 4.8 | MEDIUM | 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/C... |
| 4.0 | CNA | CVSS | 4.8 | MEDIUM | 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 |
| 3.1 | 33c584b5-0579-4c06-b2a0-8d8329fcab9c | Secondary | 4.4 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L |
| 3.1 | CNA | CVSS | 4.4 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L |
CVSS v4.0 Breakdown
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
CVSS v3.1 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| support.dcmtk.org/redmine/issues/1213 | 33c584b5-0579-4c06-b2a0-8d8329fcab9c | support.dcmtk.org | |
| github.com/DCMTK/dcmtk/commit/45469f3c30037e9c7159290e4bb74cd7b3b9ef1d | 33c584b5-0579-4c06-b2a0-8d8329fcab9c | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Arjun Basnet from Securin (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-05-25T00:00:00.000Z | CVE ID shared with the vendor |
| CNA | 2026-05-23T00:00:00.000Z | Fix committed by the vendor |
| CNA | 2026-06-19T00:00:00.000Z | Vendor approved publication |
Solutions
CNA: Update to a DCMTK version that contains commit 45469f3c30037e9c7159290e4bb74cd7b3b9ef1d. As of the publication date, no tagged release after DCMTK 3.7.0 includes this fix, so apply the commit or build from the current master branch.