CVE-2025-2357: A vulnerability was found in DCMTK 3.6.9

Routine

MEDIUM 6.3DOWNGRADE

CVE-2025-2357 is a medium-severity flaw (CVSS 6.3) affecting dcmtk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in DCMTK 3.6.9. It has been declared as critical. This vulnerability affects unknown code of the component dcmjpls JPEG-LS Decoder. The manipulation leads to memory corruption. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 3239a7915. It is recommended to apply a patch to fix this issue.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 61%)
CISA exploited list	No
Weakness	CWE-119
Published	2025-03-17
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: offis

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-03-17 02:15 UTCPublished CVE record published
2026-06-17 09:06 UTCUpdated Record last modified

offis dcmtk DOWNGRADE

Affected: 3.6.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.6.9

1. Check installed version

apt-cache policy dcmtk || rpm -q dcmtk || dcmtk --version

2. No fixed release: DOWNGRADE to a release before 3.6.9 (Debian / Ubuntu)

apt-cache madison dcmtk sudo apt install dcmtk=<VERSION_BEFORE_3.6.9> sudo apt-mark hold dcmtk

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list dcmtk sudo dnf downgrade dcmtk-<VERSION_BEFORE_3.6.9> sudo dnf versionlock add dcmtk

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-2357?

dcmtk: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-2357 being exploited?

CVE-2025-2357 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-2357 affect?

CVE-2025-2357 affects dcmtk. Severity is medium (CVSS 6.3). A vulnerability was found in DCMTK 3.6.9. It has been declared as critical. This vulnerability affects unknown code of the component dcmjpls JPEG-LS Decoder. The manipulation leads to memory corruption. The attack can be initiated remotely.

How urgent is CVE-2025-2357?

Priority 32/100. No elevated risk signals yet.

Related CVEs

CVE-2026-5663 HIGH 7.3 UPGRADE A security flaw has been discovered in OFFIS DCMTK up to 3.7.0
CVE-2025-9732 MEDIUM 5.3 UPGRADE A vulnerability was identified in DCMTK up to 3.6.9
CVE-2025-25475 HIGH 7.5 DOWNGRADE MITIGATE A NULL pointer dereference in the component /libsrc/dcrleccd.cc of DCMTK v3.6.9+ DEV allows attackers to cause
CVE-2025-25474 MEDIUM 6.5 DOWNGRADE MITIGATE DCMTK v3.6.9+ DEV was discovered to contain a buffer overflow via the component /dcmimgle/diinpxt.h.
CVE-2025-25472 MEDIUM 5.3 DOWNGRADE MITIGATE A buffer overflow in DCMTK git master v3.6.9+ DEV allows attackers to cause a Denial of Service (DoS) via a cr

References

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