Skip to main content
CVE-2025-66566VulnerabilityPublished Updated

Red Hat Security Advisory: JMC bug fix and enhancement update

Affects Red Hat JMCSource GCVE Database

0
Compare
Authoritative record:CVE-2025-66566· High 8.2

Not known to be exploited · CVSS 8.2 High : upgrade Red Hat lz4-java to 1.10.1 soon.

Data as of 5 Nov 2026, 20:35 UTC

CVSS 4.0 base score
8.2High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 1.10.1
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Dec 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Upgrade com.github.yawkat/lz4-java to 1.10.1.

Affected software

ProductAffectedFixed in
Mavencom.github.yawkat/lz4-javapkg:maven/com.github.yawkat/lz4-javaOther threatsAffected
  • <1.10.1
Fixed in
  • 1.10.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A security update is available from Red Hat for JDK Mission Control in Red Hat Enterprise Linux 9.4 Extended Update Support. Users should apply the update as described in the Red Hat advisory RHSA-2026:1823 to remediate the vulnerability. Details and instructions for applying the update are available at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated by the vendor.

Description

A security update for JDK Mission Control (JMC) addresses an information disclosure vulnerability in the lz4-java component caused by insufficient output buffer clearing. This update is provided for Red Hat Enterprise Linux 9.4 Extended Update Support. The vulnerability could potentially expose sensitive data due to improper buffer handling.

References

Community reviews

Loading reviews…