VulnerabilityPublished 27 Oct 2026Updated 29 Oct 2026

CVE-2026-101516: java-25-openjdk security update

Affects java-25-openjdkSource GCVE Database

Authoritative record:CVE-2026-101516· Medium 6.5

Not known to be exploited · CVSS 6.5 Medium · fixed in 1:25.0.5.0.8-1.0.el10.alma.1 : update java-25-openjdk when convenient.

Data as of 29 Oct 2026, 14:41 UTC

CVSS 3.1 base score

6.5Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 20% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 1:25.0.5.0.8-1.0.el10.alma.1, 1:25.0.5.0.8-1.0.el9.alma.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 20 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 29 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade the AlmaLinux to 1:25.0.5.0.8-1.0.el10.alma.1 (java-25-openjdk package, java-25-openjdk-crypto-adapter package, java-25-openjdk-crypto-adapter-fastdebug package, java-25-openjdk-crypto-adapter-slowdebug package, java-25-openjdk-demo package, java-25-openjdk-demo-fastdebug package, java-25-openjdk-demo-slowdebug package, java-25-openjdk-devel package, java-25-openjdk-devel-fastdebug package, java-25-openjdk-devel-slowdebug package, java-25-openjdk-fastdebug package, java-25-openjdk-headless package, java-25-openjdk-headless-fastdebug package, java-25-openjdk-headless-slowdebug package, java-25-openjdk-javadoc package, java-25-openjdk-javadoc-zip package, java-25-openjdk-jmods package, java-25-openjdk-jmods-fastdebug package, java-25-openjdk-jmods-slowdebug package, java-25-openjdk-slowdebug package, java-25-openjdk-src package, java-25-openjdk-src-fastdebug package, java-25-openjdk-src-slowdebug package, java-25-openjdk-static-libs package, java-25-openjdk-static-libs-fastdebug package, java-25-openjdk-static-libs-slowdebug package) or 1:25.0.5.0.8-1.0.el9.alma.1 (java-25-openjdk package, java-25-openjdk-crypto-adapter package, java-25-openjdk-crypto-adapter-fastdebug package, java-25-openjdk-crypto-adapter-slowdebug package, java-25-openjdk-demo package, java-25-openjdk-demo-fastdebug package, java-25-openjdk-demo-slowdebug package, java-25-openjdk-devel package, java-25-openjdk-devel-fastdebug package, java-25-openjdk-devel-slowdebug package, java-25-openjdk-fastdebug package, java-25-openjdk-headless package, java-25-openjdk-headless-fastdebug package, java-25-openjdk-headless-slowdebug package, java-25-openjdk-javadoc package, java-25-openjdk-javadoc-zip package, java-25-openjdk-jmods package, java-25-openjdk-jmods-fastdebug package, java-25-openjdk-jmods-slowdebug package, java-25-openjdk-slowdebug package, java-25-openjdk-src package, java-25-openjdk-src-fastdebug package, java-25-openjdk-src-slowdebug package, java-25-openjdk-static-libs package, java-25-openjdk-static-libs-fastdebug package, java-25-openjdk-static-libs-slowdebug package).

Patches and advisories

access.redhat.com/errata/RHSA-2026:88347 (opens in a new tab)

Affected software

Product	Affected	Fixed in
AlmaLinux 10java-25-openjdk	Affected <1:25.0.5.0.8-1.0.el10.alma.1	Fixed in 1:25.0.5.0.8-1.0.el10.alma.1
AlmaLinux 10java-25-openjdk-crypto-adapter	Affected <1:25.0.5.0.8-1.0.el10.alma.1	Fixed in 1:25.0.5.0.8-1.0.el10.alma.1
AlmaLinux 10java-25-openjdk-crypto-adapter-fastdebug	Affected <1:25.0.5.0.8-1.0.el10.alma.1	Fixed in 1:25.0.5.0.8-1.0.el10.alma.1
AlmaLinux 10java-25-openjdk-crypto-adapter-slowdebug	Affected <1:25.0.5.0.8-1.0.el10.alma.1	Fixed in 1:25.0.5.0.8-1.0.el10.alma.1
AlmaLinux 10java-25-openjdk-demo	Affected <1:25.0.5.0.8-1.0.el10.alma.1	Fixed in 1:25.0.5.0.8-1.0.el10.alma.1
AlmaLinux 10java-25-openjdk-demo-fastdebug	Affected <1:25.0.5.0.8-1.0.el10.alma.1	Fixed in 1:25.0.5.0.8-1.0.el10.alma.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 and should be applied to affected systems. The fixed versions are 1:25.0.5.0.8-1.0.el9.alma.1 and 1:25.0.5.0.8-1.0.el10.alma.1. Users should update their java-25-openjdk packages to these versions or later to remediate the vulnerabilities. No additional mitigation actions are indicated by the vendor advisory.

Description

Multiple security enhancements and fixes have been applied to the OpenJDK 25 packages, including improvements to certificate handling, authentication, HTTP client and server components, image processing, TLS handshakes, and other Java runtime features. These updates address a broad set of vulnerabilities identified by various CVEs, including CVE-2026-101516 which relates to certificate constraint checking. The fixes are included in updated versions of the java-25-openjdk package for Red Hat Enterprise Linux 9 and 10.

References

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