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CVE-2018-2952: Vulnerability in the Java SE, Java SE Embedded, JRockit component of Oracle Java SE (subcomponent: Concurrency

46
This month
LOW 3.7REMOTEWATCHLISTDOWNGRADEDOWNGRADEDOWNGRADE

CVE-2018-2952 is a low-severity flaw (CVSS 3.7) affecting jdk, jre, jrockit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Vulnerability in the Java SE, Java SE Embedded, JRockit component of Oracle Java SE (subcomponent: Concurrency). Supported versions that are affected are Java SE: 6u191, 7u181, 8u172 and 10.0.1; Java SE Embedded: 8u171; JRockit: R28.3.18. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded, JRockit. Successful attacks of this vulnerability can result

Why this priority

  • EPSS top 9%: very likely to be exploited
  • Remotely exploitable, no login, no user action
  • On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score3.7 (Low)
Attack vectorNetwork (remote)
Attack complexityHigh
Privileges neededNone
User interactionNone
EPSS exploit chance4.4% (top 9%)
CISA exploited listNo
Published2018-07-18
Last modified2026-06-17
Publisher (CNA): Oracle · Vendor: canonical · debian · hp · oracle

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

oracle jdk DOWNGRADE
Affected: 1.6.0 update191 · 1.7.0 update181 · 1.8.0 update172 · 10.0.1
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.6.0
1. Check installed version
apt-cache policy jdk || rpm -q jdk || jdk --version
2. No fixed release: DOWNGRADE to a release before 1.6.0 (Debian / Ubuntu)
apt-cache madison jdk sudo apt install jdk=<VERSION_BEFORE_1.6.0> sudo apt-mark hold jdk
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list jdk sudo dnf downgrade jdk-<VERSION_BEFORE_1.6.0> sudo dnf versionlock add jdk
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
oracle jre DOWNGRADE
Affected: 1.6.0 update191 · 1.7.0 update181 · 1.8.0 update172 · 10.0.1
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.6.0
1. Check installed version
apt-cache policy jre || rpm -q jre || jre --version
2. No fixed release: DOWNGRADE to a release before 1.6.0 (Debian / Ubuntu)
apt-cache madison jre sudo apt install jre=<VERSION_BEFORE_1.6.0> sudo apt-mark hold jre
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list jre sudo dnf downgrade jre-<VERSION_BEFORE_1.6.0> sudo dnf versionlock add jre
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
oracle jrockit DOWNGRADE
Affected: r28.3.18
Fixed in: no fixed release known
Safe to downgrade to: a release before r28.3.18
1. Check installed version
apt-cache policy jrockit || rpm -q jrockit || jrockit --version
2. No fixed release: DOWNGRADE to a release before r28.3.18 (Debian / Ubuntu)
apt-cache madison jrockit sudo apt install jrockit=<VERSION_BEFORE_r28.3.18> sudo apt-mark hold jrockit
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list jrockit sudo dnf downgrade jrockit-<VERSION_BEFORE_r28.3.18> sudo dnf versionlock add jrockit
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
debian debian linux MITIGATE
Affected: 8.0 · 9.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 8.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
canonical ubuntu linux MITIGATE
Affected: 14.04 · 16.04 · 18.04
Fixed in: no fixed release known
Safe to downgrade to: a release before 14.04
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
hp xp7 command view MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy xp7-command-view || rpm -q xp7-command-view || xp7-command-view --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-2952?

jdk: downgrade or apply the listed mitigation; jre: downgrade or apply the listed mitigation; jrockit: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-2952 being exploited?

CVE-2018-2952 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-2952 affect?

CVE-2018-2952 affects jdk, jre, jrockit. Severity is low (CVSS 3.7). Vulnerability in the Java SE, Java SE Embedded, JRockit component of Oracle Java SE (subcomponent: Concurrency). Supported versions that are affected are Java SE: 6u191, 7u181, 8u172 and 10.0.1; Java SE Embedded: 8u171; JRockit: R28.3.18. D

How urgent is CVE-2018-2952?

Priority 46/100. EPSS top 9%: very likely to be exploited; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Java vulnerabilities · Ubuntu vulnerabilities · Debian vulnerabilities

Related CVEs

References

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