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Vulnerability · Published Oct 8, 2026 · Assigned by securin

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

Medium 4.4

In plain English

A medium-severity out-of-bounds read in DCMTK from OFFIS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).

Severity (CVSS 3.1)4.4Medium
Exploit odds (30 days)0.1%top 98.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12dcmtkno fix listedDEBIAN-CVE-2026-44034
Debian:13dcmtkno fix listedDEBIAN-CVE-2026-44034
Debian:14dcmtkno fix listedDEBIAN-CVE-2026-44034
Ubuntu:26.04:LTSdcmtkno fix listedUBUNTU-CVE-2026-44034
Ubuntu:26.10dcmtkno fix listedUBUNTU-CVE-2026-44034

Affected products (as reported)

VendorProductVersions
OFFIS DCMTK 3.7.0

Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

References