CVE-2025-50952: openjpeg v 2.5.0 was discovered to contain a NULL pointer dereference via the component /openjp2/dwt.c.

Routine

MEDIUM 6.5REMOTEDOWNGRADE

CVE-2025-50952 is a medium-severity flaw (CVSS 6.5) affecting openjpeg. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

openjpeg v 2.5.0 was discovered to contain a NULL pointer dereference via the component /openjp2/dwt.c.

Why this priority

Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-476
Published	2025-08-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: uclouvain

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

Am I affected?

Timeline

2025-08-07 15:15 UTCPublished CVE record published
2026-06-17 09:35 UTCUpdated Record last modified

uclouvain openjpeg DOWNGRADE

Affected: 2.5.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.5.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.5.0 (Debian / Ubuntu)

apt-cache madison openjpeg sudo apt install openjpeg=<VERSION_BEFORE_2.5.0> sudo apt-mark hold openjpeg

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

dnf --showduplicates list openjpeg sudo dnf downgrade openjpeg-<VERSION_BEFORE_2.5.0> sudo dnf versionlock add openjpeg

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-2025-50952?

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

Is CVE-2025-50952 being exploited?

CVE-2025-50952 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-2025-50952 affect?

CVE-2025-50952 affects openjpeg. Severity is medium (CVSS 6.5). openjpeg v 2.5.0 was discovered to contain a NULL pointer dereference via the component /openjp2/dwt.c.

How urgent is CVE-2025-50952?

Priority 33/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-39329 MEDIUM 6.5 DOWNGRADE A flaw was found in OpenJPEG
CVE-2023-39327 MEDIUM 4.3 DOWNGRADE A flaw was found in OpenJPEG
CVE-2023-39328 MEDIUM 5.5 DOWNGRADE A vulnerability was found in OpenJPEG similar to CVE-2019-6988
CVE-2025-54874 CRITICAL 9.8 UPGRADE OpenJPEG is an open-source JPEG 2000 codec

References

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