CVE-2010-0840: Oracle JRE Unspecified Vulnerability

100

Patch now

CRITICAL 9.8EXPLOITEDREMOTEWATCHLISTDOWNGRADEMITIGATEMITIGATE

CVE-2010-0840 is a critical-severity flaw (CVSS 9.8) affecting jre, opensuse, ubuntu linux, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Unspecified vulnerability in the Java Runtime Environment component in Oracle Java SE and Java for Business 6 Update 18, 5.0 Update 23, and 1.4.2_25 allows remote attackers to affect confidentiality, integrity, and availability via unknown vectors. NOTE: the previous information was obtained from the March 2010 CPU. Oracle has not commented on claims from a reliable researcher that this is related to improper checks when executing privileged me

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
Exploited in the wild (CISA KEV)
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	96.3% (top 1%)
CISA exploited list	Yes, fix due 2022-06-15
Published	2010-04-01
Last modified	2026-06-16

Publisher (CNA): Oracle · Vendor: canonical · opensuse · oracle

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2010-04-01 16:30 UTCPublished CVE record published
2022-05-25Exploited Added to the CISA Known Exploited Vulnerabilities list
2022-06-15Deadline CISA due date for US federal agencies to patch
2026-06-16 23:16 UTCUpdated Record last modified

oracle jre DOWNGRADE

Affected: 1.4.2_25 · 1.5.0 update23 · 1.6.0 update18

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.4.2_25

1. Check installed version

apt-cache policy jre || rpm -q jre || jre --version

2. No fixed release: DOWNGRADE to a release before 1.4.2_25 (Debian / Ubuntu)

apt-cache madison jre sudo apt install jre=<VERSION_BEFORE_1.4.2_25> sudo apt-mark hold jre

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list jre sudo dnf downgrade jre-<VERSION_BEFORE_1.4.2_25> 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.

opensuse opensuse MITIGATE

Affected: 11.0 · 11.1 · 11.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.0

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: 8.04 · 8.10 · 9.04 · 9.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.04

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.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · dupeguru · FIXED · 4.3.1^20261101git7a2c79f-1.fc46 · FEDORA-2026-fe4523382c · source

sudo dnf upgrade --advisory=FEDORA-2026-fe4523382c

Fedora ELN · openexr · FIXED · 3.4.13-3.eln159 · FEDORA-2026-827a613db5 · source

sudo dnf upgrade --advisory=FEDORA-2026-827a613db5

RHEL 5 · java-1.6.0-openjdk · FIXED · java-1.6.0-openjdk-1.6.0.0-1.11.b16.el5

sudo dnf upgrade --advisory=RHSA-2010:0339 rpm -q java-1.6.0-openjdk

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9974
Exploit-DB: Java - 'Statement.invoke()' Trusted Method Chain (Metasploit)
Metasploit: Java Statement.invoke() Trusted Method Chain Privilege Escalation

Verify at the official source NVD · CVE Program · CISA KEV catalog · 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-2010-0840?

jre: downgrade or apply the listed mitigation; opensuse: mitigate or apply the listed mitigation; ubuntu linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2010-0840 being exploited?

Yes. CVE-2010-0840 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2010-0840 affect?

CVE-2010-0840 affects jre, opensuse, ubuntu linux. Severity is critical (CVSS 9.8). Unspecified vulnerability in the Java Runtime Environment component in Oracle Java SE and Java for Business 6 Update 18, 5.0 Update 23, and 1.4.2_25 allows remote attackers to affect confidentiality, integrity, and availability via unknown

How urgent is CVE-2010-0840?

Priority 100/100. Critical severity; EPSS top 1%: very likely to be exploited; Exploited in the wild (CISA KEV); Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Java vulnerabilities · Ubuntu vulnerabilities

Related CVEs

CVE-2026-34282 HIGH 7.5 DOWNGRADE DOWNGRADE Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Orac
CVE-2026-22013 MEDIUM 5.3 DOWNGRADE DOWNGRADE Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Orac
CVE-2026-22018 LOW 3.7 DOWNGRADE DOWNGRADE Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Orac
CVE-2026-22003 MEDIUM 6.0 DOWNGRADE DOWNGRADE Vulnerability in the Oracle Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: H
CVE-2026-22008 LOW 3.7 DOWNGRADE DOWNGRADE Vulnerability in Oracle Java SE (component: Libraries)

References

← Back to latest CVEs