CVE-2021-29428: In Gradle before version 7.0, on Unix-like systems, the system temporary directory can be created with open pe

Q: How do I fix CVE-2021-29428?

gradle: upgrade to 7.0; quarkus: upgrade to newer than 2.2.3. Exact commands for each OS are on this page.

Q: Is CVE-2021-29428 being exploited?

CVE-2021-29428 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-29428 affect?

CVE-2021-29428 affects gradle, quarkus. Severity is high (CVSS 8.8). In Gradle before version 7.0, on Unix-like systems, the system temporary directory can be created with open permissions that allow multiple users to create and delete files within it. Gradle builds could be vulnerable to a local privilege e

Q: How urgent is CVE-2021-29428?

Priority 47/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADEUPGRADE

CVE-2021-29428 is a high-severity flaw (CVSS 8.8) affecting gradle, quarkus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Gradle before version 7.0, on Unix-like systems, the system temporary directory can be created with open permissions that allow multiple users to create and delete files within it. Gradle builds could be vulnerable to a local privilege escalation from an attacker quickly deleting and recreating files in the system temporary directory. This vulnerability impacted builds using precompiled script plugins written in Kotlin DSL and tests for Gradle

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 54%)
CISA exploited list	No
Weakness	CWE-378, CWE-379
Published	2021-04-13
Last modified	2026-10-08

Publisher (CNA): GitHub, Inc. · Vendor: gradle · quarkus

Last updated 2026-10-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-04-13 20:15 UTCPublished CVE record published
2026-10-08 22:17 UTCUpdated Record last modified

gradle gradle UPGRADE

Affected: < 7.0

Fixed in: 7.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 7.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade gradle

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gradle

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

quarkus quarkus UPGRADE

Affected: <= 2.2.3

Fixed in: newer than 2.2.3

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2.2.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade quarkus

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade quarkus

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2021-29428?

gradle: upgrade to 7.0; quarkus: upgrade to newer than 2.2.3. Exact commands for each OS are on this page.

Is CVE-2021-29428 being exploited?

CVE-2021-29428 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-2021-29428 affect?

CVE-2021-29428 affects gradle, quarkus. Severity is high (CVSS 8.8). In Gradle before version 7.0, on Unix-like systems, the system temporary directory can be created with open permissions that allow multiple users to create and delete files within it. Gradle builds could be vulnerable to a local privilege e

How urgent is CVE-2021-29428?

Priority 47/100. High severity; Public exploit reference

Software pages

Kotlin vulnerabilities

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References

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