Use after free in Oracle Java SE and GraalVM JDK tools
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Partial Red Hat: 29 fixed, 4 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
Oracle Java SE 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1 and 27, Oracle GraalVM for JDK 17.0.20.1 and 21.0.12.1, and Oracle GraalVM Enterprise Edition 21.3.19.1.1 are affected. A use-after-free flaw (CWE-416) in the JDK tools component lets an unauthenticated attacker with local logon create, delete or modify critical data. The attack is hard to carry out and needs a user to interact with the software.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Description from the CNA
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JDK tools). Supported versions that are affected are Oracle Java SE: 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27; Oracle GraalVM for JDK: 17.0.20.1 and 21.0.12.1; Oracle GraalVM Enterprise Edition: 21.3.19.1.1. Difficult to exploit vulnerability allows unauthenticated attacker with logon to the infrastructure where Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition executes to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS 3.1 Base Score 4.7 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N).
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Oracle | Oracle Java SE | 8u503-perf; 11.0.32.1; 17.0.20.1; 21.0.12.1; 25.0.4.1; 27 | — | No fix listed | CNA |
| Oracle | Oracle GraalVM for JDK | 17.0.20.1; 21.0.12.1 | — | No fix listed | CNA |
| Oracle | Oracle GraalVM Enterprise Edition | 21.3.19.1.1 | — | No fix listed | CNA |
- Oracle Java SE VendorOracle Affected 8u503-perf; 11.0.32.1; 17.0.20.1; 21.0.12.1; 25.0.4.1; 27 Fixed in — No fix listed CNA
- Oracle GraalVM for JDK VendorOracle Affected 17.0.20.1; 21.0.12.1 Fixed in — No fix listed CNA
- Oracle GraalVM Enterprise Edition VendorOracle Affected 21.3.19.1.1 Fixed in — No fix listed CNA
Remediation
Red Hat fixes OpenJDK in RHSA-2026:88348 (Red Hat Build of OpenJDK 25.0.5), RHSA-2026:88351 (Red Hat Build of OpenJDK 21.0.13) and RHSA-2026:90500 (java-17-openjdk for RHEL 9), while Red Hat Enterprise Linux 6 and 7 have no fix planned and Red Hat Enterprise Linux 10 and Red Hat Hardened Images have no fix available. The sources list no fixed version for Oracle Java SE, Oracle GraalVM for JDK or Oracle GraalVM Enterprise Edition.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Red Hat 18 advisories
- RHSA-2026:94499 Released 2026-11-05 · Red Hat rating CriticalOpenJDK 11.0.33 ELS Security Update For Portable Linux Builds
- OPENJDK ELS 11.0.33
- RHSA-2026:95273 Released 2026-11-05 · Red Hat rating CriticalOpenJDK 11.0.33 ELS Security Update for Windows Builds
- OPENJDK ELS 11.0.33
- RHSA-2026:94520 Released 2026-11-05 · Red Hat rating ImportantJava 11 OpenJDK ELS Security Update
- Red Hat OpenJDK 11 ELS for RHEL 7 java-11-openjdk-1:11.0.33.0.10-1.el7_9, java-11-openjdk-debug-1:11.0.33.0.10-1.el7_9, java-11-openjdk-demo-1:11.0.33.0.10-1.el7_9 +15
- Red Hat OpenJDK 11 ELS for RHEL 8 java-11-openjdk-1:11.0.33.0.10-1.el8, java-11-openjdk-demo-1:11.0.33.0.10-1.el8, java-11-openjdk-demo-fastdebug-1:11.0.33.0.10-1.el8 +20
- Red Hat OpenJDK 11 ELS for RHEL 9 java-11-openjdk-1:11.0.33.0.10-1.el9, java-11-openjdk-demo-1:11.0.33.0.10-1.el9, java-11-openjdk-demo-fastdebug-1:11.0.33.0.10-1.el9 +20
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- RHSA-2026:94403 Released 2026-11-03 · Red Hat rating CriticalRed Hat Hardened Images RPMs bug fix and enhancement update
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- RHSA-2026:94111 Released 2026-11-02 · Red Hat rating CriticalRed Hat Hardened Images RPMs bug fix and enhancement update
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- RHSA-2026:94069 Released 2026-11-02 · Red Hat rating CriticalRed Hat Hardened Images RPMs bug fix and enhancement update
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- Red Hat CodeReady Linux Builder EUS (v.9.6) java-17-openjdk-demo-fastdebug-1:17.0.21.0.9-2.1.el9, java-17-openjdk-demo-slowdebug-1:17.0.21.0.9-2.1.el9, java-17-openjdk-devel-fastdebug-1:17.0.21.0.9-2.1.el9 +11
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- Red Hat Enterprise Linux AppStream E4S (v.9.2) java-17-openjdk-1:17.0.21.0.9-2.1.el9, java-17-openjdk-demo-1:17.0.21.0.9-2.1.el9, java-17-openjdk-devel-1:17.0.21.0.9-2.1.el9 +6
- Red Hat Enterprise Linux AppStream E4S (v.9.4) java-17-openjdk-1:17.0.21.0.9-2.1.el9, java-17-openjdk-demo-1:17.0.21.0.9-2.1.el9, java-17-openjdk-devel-1:17.0.21.0.9-2.1.el9 +6
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- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) java-17-openjdk-demo-fastdebug-1:17.0.21.0.9-2.2.el9, java-17-openjdk-demo-slowdebug-1:17.0.21.0.9-2.2.el9, java-17-openjdk-devel-fastdebug-1:17.0.21.0.9-2.2.el9 +11
- RHSA-2026:88349 Released 2026-10-30 · Red Hat rating Importantjava-21-openjdk security update for RHEL 8 and 9
- Red Hat CodeReady Linux Builder EUS (v.9.6) java-21-openjdk-demo-fastdebug-1:21.0.13.0.9-1.1.el9, java-21-openjdk-demo-slowdebug-1:21.0.13.0.9-1.1.el9, java-21-openjdk-devel-fastdebug-1:21.0.13.0.9-1.1.el9 +11
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- Red Hat Enterprise Linux AppStream (v. 9) java-21-openjdk-1:21.0.13.0.9-1.2.el9, java-21-openjdk-demo-1:21.0.13.0.9-1.2.el9, java-21-openjdk-devel-1:21.0.13.0.9-1.2.el9 +6
- Red Hat Enterprise Linux AppStream E4S (v.9.4) java-21-openjdk-1:21.0.13.0.9-1.1.el9, java-21-openjdk-demo-1:21.0.13.0.9-1.1.el9, java-21-openjdk-devel-1:21.0.13.0.9-1.1.el9 +6
- Red Hat Enterprise Linux AppStream EUS (v.9.6) java-21-openjdk-1:21.0.13.0.9-1.1.el9, java-21-openjdk-demo-1:21.0.13.0.9-1.1.el9, java-21-openjdk-devel-1:21.0.13.0.9-1.1.el9 +6
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- RHSA-2026:90504 Released 2026-10-29 · Red Hat rating Importantjava-21-openjdk security update for RHEL 10
- Red Hat Enterprise Linux AppStream (v. 10) java-21-openjdk-1:21.0.13.0.9-1.2.el10, java-21-openjdk-demo-1:21.0.13.0.9-1.2.el10, java-21-openjdk-devel-1:21.0.13.0.9-1.2.el10 +6
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- Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) java-21-openjdk-demo-fastdebug-1:21.0.13.0.9-1.2.el10, java-21-openjdk-demo-slowdebug-1:21.0.13.0.9-1.2.el10, java-21-openjdk-devel-fastdebug-1:21.0.13.0.9-1.2.el10 +11
- Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) java-21-openjdk-demo-fastdebug-1:21.0.13.0.9-1.1.el10, java-21-openjdk-demo-slowdebug-1:21.0.13.0.9-1.1.el10, java-21-openjdk-devel-fastdebug-1:21.0.13.0.9-1.1.el10 +11
- RHSA-2026:90912 Released 2026-10-29 · Red Hat rating CriticalOpenJDK 25.0.5 Security Update for Windows Builds
- Temurin Build of OpenJDK 25.0.4.1
- RHSA-2026:88348 Released 2026-10-29 · Red Hat rating CriticalOpenJDK 25.0.5 Security Update for Portable Linux Builds
- Red Hat Build of OpenJDK 25.0.5
- RHSA-2026:88351 Released 2026-10-29 · Red Hat rating CriticalOpenJDK 21.0.13 Security Update for Windows Builds
- Red Hat Build of OpenJDK 21.0.13
- RHSA-2026:88350 Released 2026-10-29 · Red Hat rating CriticalOpenJDK 21.0.13 Security Update for Portable Linux Builds
- Red Hat Build of OpenJDK 21.0.12.1
- RHSA-2026:88347 Released 2026-10-27 · Red Hat rating Importantjava-25-openjdk security update
- Red Hat Enterprise Linux AppStream (v. 10) java-25-openjdk-1:25.0.5.0.8-1.0.el10, java-25-openjdk-crypto-adapter-1:25.0.5.0.8-1.0.el10, java-25-openjdk-demo-1:25.0.5.0.8-1.0.el10 +7
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- Red Hat Build of OpenJDK 17.0.21
- RHSA-2026:89916 Released 2026-10-27 · Red Hat rating CriticalOpenJDK 17.0.21 Security Update for Windows Builds
- Red Hat Build of OpenJDK 17.0.20.1
- RHSA-2026:88352 Released 2026-10-27 · Red Hat rating Importantjava-17-openjdk security update for RHEL 8
- Red Hat Enterprise Linux AppStream (v. 8) java-17-openjdk-1:17.0.21.0.9-2.1.el8, java-17-openjdk-demo-1:17.0.21.0.9-2.1.el8, java-17-openjdk-devel-1:17.0.21.0.9-2.1.el8 +6
- Red Hat Enterprise Linux AppStream AUS (v.8.4) java-17-openjdk-1:17.0.21.0.9-2.1.el8, java-17-openjdk-demo-1:17.0.21.0.9-2.1.el8, java-17-openjdk-devel-1:17.0.21.0.9-2.1.el8 +6
- Red Hat Enterprise Linux AppStream AUS (v.8.6) java-17-openjdk-1:17.0.21.0.9-2.1.el8, java-17-openjdk-demo-1:17.0.21.0.9-2.1.el8, java-17-openjdk-devel-1:17.0.21.0.9-2.1.el8 +6
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- Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) java-17-openjdk-1:17.0.21.0.9-2.1.el8, java-17-openjdk-demo-1:17.0.21.0.9-2.1.el8, java-17-openjdk-demo-fastdebug-1:17.0.21.0.9-2.1.el8 +20
- Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) java-17-openjdk-1:17.0.21.0.9-2.1.el8, java-17-openjdk-demo-1:17.0.21.0.9-2.1.el8, java-17-openjdk-devel-1:17.0.21.0.9-2.1.el8 +6
- Red Hat Enterprise Linux AppStream TUS (v.8.8) java-17-openjdk-1:17.0.21.0.9-2.1.el8, java-17-openjdk-demo-1:17.0.21.0.9-2.1.el8, java-17-openjdk-devel-1:17.0.21.0.9-2.1.el8 +6
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Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Oracle GraalVM Enterprise Edition, Oracle GraalVM for JDK, Oracle Java SE — oracle.com/security-alerts/cpuoct2026.html
51 records Highest priority Priority LOW 51 LOW
Other records, highest priority first
- TI-2026-77455 Improper access control in Oracle Java SE and GraalVMPriority LOW 35
- TI-2026-77105 Improper access control in Oracle Java SE networking componentPriority LOW 35
- TI-2026-77828 Improper access control in Oracle Java SEPriority LOW 34
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Hardened Images | Affected | No fix yet |
| OPENJDK ELS 11.0.33 | Fixed | RHSA-2026:95273 |
| Red Hat Build of OpenJDK 17.0.20.1 | Fixed | RHSA-2026:89916 |
| Red Hat Build of OpenJDK 17.0.21 | Fixed | RHSA-2026:88353 |
| Red Hat Build of OpenJDK 21.0.12.1 | Fixed | RHSA-2026:88350 |
| Red Hat Build of OpenJDK 21.0.13 | Fixed | RHSA-2026:88351 |
| Red Hat Build of OpenJDK 25.0.5 | Fixed | RHSA-2026:88348 |
| Red Hat CodeReady Linux Builder EUS (v.9.6) | Fixed | RHSA-2026:88349, RHSA-2026:90500 |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:88347, RHSA-2026:90504 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2026:88349, RHSA-2026:88352 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:88347, RHSA-2026:88349, RHSA-2026:90500 |
| Red Hat Enterprise Linux AppStream AUS (v.8.4) | Fixed | RHSA-2026:88352 |
| Red Hat Enterprise Linux AppStream AUS (v.8.6) | Fixed | RHSA-2026:88352 |
| Red Hat Enterprise Linux AppStream E4S (v.8.8) | Fixed | RHSA-2026:88352 |
| Red Hat Enterprise Linux AppStream E4S (v.9.2) | Fixed | RHSA-2026:90500 |
| Red Hat Enterprise Linux AppStream E4S (v.9.4) | Fixed | RHSA-2026:88349, RHSA-2026:90500 |
| Red Hat Enterprise Linux AppStream EUS (v. 10.0) | Fixed | RHSA-2026:90504 |
| Red Hat Enterprise Linux AppStream EUS (v.9.6) | Fixed | RHSA-2026:88349, RHSA-2026:90500 |
| Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) | Fixed | RHSA-2026:88352 |
| Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) | Fixed | RHSA-2026:88352 |
| Red Hat Enterprise Linux AppStream TUS (v.8.8) | Fixed | RHSA-2026:88352 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2026:88349, RHSA-2026:88352 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) | Fixed | RHSA-2026:88347, RHSA-2026:90504 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | Fixed | RHSA-2026:88347, RHSA-2026:88349, RHSA-2026:90500 |
| Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) | Fixed | RHSA-2026:90504 |
| Red Hat Hardened Images | Fixed | RHSA-2026:94069, RHSA-2026:94111, RHSA-2026:94403, RHSA-2026:94625 |
| Red Hat OpenJDK 11 ELS for RHEL 7 | Fixed | RHSA-2026:94520 |
| Red Hat OpenJDK 11 ELS for RHEL 8 | Fixed | RHSA-2026:94520 |
| Red Hat OpenJDK 11 ELS for RHEL 9 | Fixed | RHSA-2026:94520 |
| Temurin Build of OpenJDK 25.0.4.1 | Fixed | RHSA-2026:90912 |
Not affected: 4 products
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat build of OpenJDK 1.8
Timeline
- 2026-10-21 Threatist record created from CVE-2026-91379
- 2026-10-21 Alias added: GHSA-53gh-9p66-w4f4
- 2026-10-21 Weakness changed · CISA ADP
- 2026-10-21 CISA SSVC decision points changed
- 2026-10-21 Affected versions changed · Red Hat
- 2026-10-21 CVSS score added · Red Hat
- 2026-10-29 Fix available: RHSA-2026:88353 · Red Hat
- 2026-10-29 Fix available: RHSA-2026:88347 · Red Hat
- 2026-10-29 Fix available: RHSA-2026:88352 · Red Hat
- 2026-10-29 Fix available: Red Hat Build of OpenJDK 17.0.21, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 8) +10 · Red Hat
- 2026-10-29 Fix available: RHSA-2026:88348 · Red Hat
- 2026-10-29 Fix available: RHSA-2026:88351 · Red Hat
- 2026-10-29 Fix available: RHSA-2026:88350 · Red Hat
- 2026-10-29 Fix available: RHSA-2026:89916 · Red Hat
- 2026-10-29 Fix available: Red Hat Build of OpenJDK 17.0.20.1, Red Hat Build of OpenJDK 21.0.12.1, Red Hat Build of OpenJDK 21.0.13 +1 · Red Hat
- 2026-10-30 Fix available: RHSA-2026:90912 · Red Hat
- 2026-10-30 Fix available: Temurin Build of OpenJDK 25.0.4.1 · Red Hat
- 2026-10-30 Fix available: RHSA-2026:90504 · Red Hat
- 2026-10-30 Fix available: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · Red Hat
- 2026-10-30 Fix available: RHSA-2026:88349 · Red Hat
- 2026-10-30 Fix available: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream E4S (v.9.4), Red Hat Enterprise Linux AppStream EUS (v.9.6) · Red Hat
- 2026-11-01 Fix available: RHSA-2026:90500 · Red Hat
- 2026-11-01 Fix available: Red Hat Enterprise Linux AppStream E4S (v.9.2) · Red Hat
- 2026-11-03 Fix available: RHSA-2026:94069 · Red Hat
- 2026-11-03 Fix available: Red Hat Hardened Images · Red Hat
- 2026-11-03 Fix available: RHSA-2026:94111 · Red Hat
- 2026-11-03 Affected versions changed · Red Hat
- 2026-11-04 Fix available: RHSA-2026:94625 · Red Hat
- 2026-11-04 Affected versions changed · Red Hat
- 2026-11-05 Fix available: OpenJDK 21.0.13.0.9 · Red Hat
- 2026-11-06 Fix available: RHSA-2026:95273 · Red Hat
- 2026-11-06 Fix available: RHSA-2026:94403 · Red Hat
- 2026-11-06 Fix available: RHSA-2026:94520 · Red Hat
- 2026-11-06 Fix available: OPENJDK ELS 11.0.33, Red Hat Build of OpenJDK 21.0.12.1, Red Hat Build of OpenJDK 21.0.13 +3 · Red Hat
- 2026-11-06 Fix available: RHSA-2026:94499 · Red Hat
References
Advisory 1
More Oracle vulnerabilities
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- TI-2026-27421 Missing authentication in Oracle PeopleSoft Enterprise PeopleTools KEVCVSS 3.1CRITICAL 9.8
- TI-2026-17661 Improper access control in Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in KEVCVSS 3.1CRITICAL 10.0
- TI-2025-38252 Improper authentication in Oracle Concurrent Processing KEVCVSS 3.1CRITICAL 9.8
- TI-2025-38151 Missing authentication in Oracle Identity Manager KEVCVSS 3.1CRITICAL 9.8
- TI-2022-07142 Code injection in Spring Framework KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-91379 · CVE Program
- CVE-2026-91379 · NVD
- FIRST EPSS
- GHSA-53gh-9p66-w4f4 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-91379 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences