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Alerts This Week
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Debian 11 OpenJDK Important Security Update DLA-4456-1 CVE-2026-21925

debian lts
Calendar Grey January 26, 2026
Dist Debian Esm H88
Upgrade your Debian openjdk-17 packages to mitigate risks of certificate validation errors and man-in-the-middle attacks.
Several vulnerabilities have been discovered in the OpenJDK Java runtime, which may result in incorrect certificate validation, CRLF injection or man-in-the-middle attacks
Topics%20covered

Topics Covered

security advisory debian important man-in-the-middle openjdk certificate validation

Summary

For Debian 11 bullseye, these problems have been fixed in version
17.0.18+8-1~deb11u1.

We recommend that you upgrade your openjdk-17 packages.

For the detailed security status of openjdk-17 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/openjdk-17

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS


Severity
important
Lowest
Low
Medium
High
Critical

Package: openjdk-17
Version: 17.0.18+8-1~deb11u1
CVE ID: CVE-2026-21925 CVE-2026-21932 CVE-2026-21933 CVE-2026-21945

Topics%20covered

Topics Covered

security advisory debian important man-in-the-middle openjdk certificate validation

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