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Java-25-Openjdk Security Update — AlmaLinux 9 (ALSA-2026:88347)
ALSA-2026:88347 updates OpenJDK 25 on AlmaLinux 9 with the same 40-CVE hardening batch as the OpenJDK 17 erratum (CVE-2026-83374 PKCS5 padding, CVE-2026-83376 TLS certificates, CVE-2026-83380 LDAP logins, CVE-2026-83381 SASL authentication and more). Update with dnf update java-25-openjdk and restart Java applications on AlmaLinux 9.
High
5.9 CVSS
AlmaLinux 9
What this means under a SharedLicense license
The fixes harden Java's TLS, authentication and crypto layers — the paths through which Java applications handle credentials and sessions — closing disclosure-class flaws across the board.
The OpenJDK 25 packages provide the OpenJDK 25 Java Runtime Environment and the OpenJDK 25 Java Software Development Kit. Security Fix(es): * JDK: Enhance PKCS5 padding (CVE-2026-83374) * JDK: Enhance TLS certificate handling (CVE-2026-83376) * JDK: Improve C2 loop transformations (CVE-2026-83378) * JDK: Enhance LDAP logins (CVE-2026-83380) * JDK: Enhance SASL Authentication (CVE-2026-83381) * JDK: Enhance WebRowSets (CVE-2026-83387) * JDK: Enhance HTTP Client Response Handling (CVE-2026-83395) * JDK: Enhance XML Processing (CVE-2026-83400) * JDK: Enhance Vector Processing (CVE-2026-87255) * JDK: Enhance XPath Expressions (CVE-2026-87290) * JDK: Enhance HTTP Server (CVE-2026-87291) * JDK: Enhance Network Clients (CVE-2026-87292) * JDK: Enhance Certificate Name Checks (CVE-2026-87294) * JDK: Enhance Template Handling (CVE-2026-87367) * JDK: Enhance HTTP Client (CVE-2026-91332) * JDK: Improve ciphertext handling (CVE-2026-91333) * JDK: Enhance JPEG loading (CVE-2026-91334) * JDK: Enhance Image Handling (CVE-2026-91335) * JDK: Enhance TLS handshakes (CVE-2026-91373) * JDK: Enhance jstatd (CVE-2026-91374) * JDK: Enhance jmod handling (CVE-2026-91375) * JDK: Enhance JShell (CVE-2026-91379) * JDK: Enhance Preferences (CVE-2026-91380) * JDK: Enhance HTTP client caching (CVE-2026-91394) * JDK: Enhance diagnostic sessions (CVE-2026-91397) * JDK: Enhance SOCKS5 support (CVE-2026-91398) * JDK: Enhance MIDI file handling (CVE-2026-91400) * JDK: Enhance zipfs (CVE-2026-91410) * JDK: Enhance font rendering (CVE-2026-91415) * JDK: Enhance GIF loading (CVE-2026-91418) * JDK: Enhance HTTP server parsing (CVE-2026-91451) * JDK: Enhance HTTP server (CVE-2026-91452) * JDK: Improve HTTP headers (CVE-2026-91453) * JDK: Enhance TLS Extensions (CVE-2026-91461) * JDK: Enhance krb5 tokens (CVE-2026-91462) * JDK: Enhance krb5 client (CVE-2026-91463) * JDK: Enhance Kerberos validation (CVE-2026-91464) * JDK: Enhance C2 comparisons (CVE-2026-91487) * JDK: Enhance Certificate Constraint Checking (CVE-2026-101516) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Note that the OpenJDK RPMs use the system certificate store, so the eMudhra CVEs (CVE-2026-91403 & CVE-2026-114820) should be resolved by updating the ca-certificates package.
Frequently Asked Questions
What is ALSA-2026:88347?
It is AlmaLinux's OpenJDK 25 erratum for AlmaLinux 9, applying 40 CVE fixes including CVE-2026-83374 (PKCS5 padding), CVE-2026-83376 (TLS certificate handling), CVE-2026-83378 (C2 loop transformations) and CVE-2026-83380 (LDAP logins).
Who is affected?
AlmaLinux 9 servers running Java 25 applications on the OpenJDK 25 packages — Java services, application servers and build environments.
How do I apply the fix?
Run dnf update java-25-openjdk and restart Java applications; verify with java -version showing the updated build.
Is this the same update as the OpenJDK 17 one?
It is the same upstream October security batch delivered for a different branch — AlmaLinux 8 received it as ALSA-2026:88352 for OpenJDK 17, AlmaLinux 9 as this erratum for OpenJDK 25. Apply per version installed.
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