CVE-2020-35874: An issue was discovered in the internment crate through 2020-05-28 for Rust

This week

HIGH 8.1REMOTEDOWNGRADE

CVE-2020-35874 is a high-severity flaw (CVSS 8.1) affecting internment. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in the internment crate through 2020-05-28 for Rust. ArcIntern::drop has a race condition and resultant use-after-free.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-362, CWE-416
Published	2020-12-31
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: internment project

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

Am I affected?

Timeline

2020-12-31 10:15 UTCPublished CVE record published
2026-06-17 03:14 UTCUpdated Record last modified

internment project internment DOWNGRADE

Affected: 0.3.12

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.3.12

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.3.12 (Debian / Ubuntu)

apt-cache madison internment sudo apt install internment=<VERSION_BEFORE_0.3.12> sudo apt-mark hold internment

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

dnf --showduplicates list internment sudo dnf downgrade internment-<VERSION_BEFORE_0.3.12> sudo dnf versionlock add internment

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.

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-2020-35874?

internment: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-35874 being exploited?

CVE-2020-35874 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-2020-35874 affect?

CVE-2020-35874 affects internment. Severity is high (CVSS 8.1). An issue was discovered in the internment crate through 2020-05-28 for Rust. ArcIntern::drop has a race condition and resultant use-after-free.

How urgent is CVE-2020-35874?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-28037 CRITICAL 9.8 UPGRADE An issue was discovered in the internment crate before 0.4.2 for Rust

References

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