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CVE-2023-21835

16
FAUCET Score

CVE-2023-21835 is a partial denial-of-service vulnerability in the JSSE component of Oracle Java SE and Oracle GraalVM Enterprise Edition, affecting versions 11.0.17, 17.0.5, 19.0.1, 20.3.8, 21.3.4, and 22.3.0 respectively. This easily exploitable flaw allows an unauthenticated attacker with network access via DTLS to cause a partial denial of service. It primarily impacts Java deployments running untrusted code in sandboxed environments, not server-side deployments with trusted code. Rated with a CVSS 3.1 Base Score of 5.3 (Medium), the vulnerability has a low impact on availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
20.3.8CPE matchmatch criteria
cpe:2.3:a:oracle:graalvm:20.3.8:*:*:*:enterprise:*:*:*
21.3.4CPE matchmatch criteria
cpe:2.3:a:oracle:graalvm:21.3.4:*:*:*:enterprise:*:*:*
22.3.0CPE matchmatch criteria
cpe:2.3:a:oracle:graalvm:22.3.0:*:*:*:enterprise:*:*:*
11.0.17CPE matchmatch criteria
cpe:2.3:a:oracle:jdk:11.0.17:*:*:*:*:*:*:*
17.0.5CPE matchmatch criteria
cpe:2.3:a:oracle:jdk:17.0.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.84%
Probability of exploitation in next 30 days
EPSS Percentile
76.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0184 is in the 64th percentile among its peer group of 23,725 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (22)

oraclepatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Build of OpenJDK 11.0.18
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Build of OpenJDK 17.0.6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: java-11-openjdk-1:11.0.18.0.10-1.el7_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: java-17-openjdk-1:17.0.6.0.10-3.el8_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: java-11-openjdk-1:11.0.18.0.10-2.el8_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.1 Update Services for SAP SolutionsFixed in: java-11-openjdk-1:11.0.18.0.10-1.el8_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Advanced Update SupportFixed in: java-11-openjdk-1:11.0.18.0.10-1.el8_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceFixed in: java-11-openjdk-1:11.0.18.0.10-1.el8_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsFixed in: java-11-openjdk-1:11.0.18.0.10-1.el8_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: java-17-openjdk-1:17.0.6.0.10-2.el8_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: java-11-openjdk-1:11.0.18.0.10-1.el8_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: java-17-openjdk-1:17.0.6.0.10-2.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: java-11-openjdk-1:11.0.18.0.10-1.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: java-17-openjdk-1:17.0.6.0.10-3.el9_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: java-11-openjdk-1:11.0.18.0.10-2.el9_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: java-17-openjdk-1:17.0.6.0.10-2.el9_0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: java-11-openjdk-1:11.0.18.0.10-1.el9_0
View patch
redhatno patchvia redhat_api
Product: Red Hat build of OpenJDK 11Fixed in: Linux
redhatno patchvia redhat_api
Product: Red Hat build of OpenJDK 11Fixed in: Windows
redhatno patchvia redhat_api
Product: Red Hat build of OpenJDK 17Fixed in: Linux
redhatno patchvia redhat_api
Product: Red Hat build of OpenJDK 17Fixed in: Windows

Vendor Advisories (1)

redhatCVE-2023-21835Moderate

OpenJDK: handshake DoS attack against DTLS connections (JSSE, 8287411)

Jan 17, 2023

References

security.gentoo.org / glsa/202401-25
oracle.com / security-alerts/cpujan2023.html
PatchVendor Advisory