CVE-2020-36203: An issue was discovered in the reffers crate through 2020-12-01 for Rust

Q: How do I fix CVE-2020-36203?

reffers: upgrade to newer than 2020-12-01. Exact commands for each OS are on this page.

Q: Is CVE-2020-36203 being exploited?

CVE-2020-36203 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-2020-36203 affect?

CVE-2020-36203 affects reffers. Severity is medium (CVSS 4.7). An issue was discovered in the reffers crate through 2020-12-01 for Rust. ARefss can contain a !Send,!Sync object, leading to a data race and memory corruption.

Q: How urgent is CVE-2020-36203?

Priority 25/100. Public exploit reference

Routine

MEDIUM 4.7UPGRADE

CVE-2020-36203 is a medium-severity flaw (CVSS 4.7) affecting reffers. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in the reffers crate through 2020-12-01 for Rust. ARefss can contain a !Send,!Sync object, leading to a data race and memory corruption.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.7 (Medium)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-362, CWE-787
Published	2021-01-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: reffers project

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

Am I affected?

Timeline

2021-01-26 18:15 UTCPublished CVE record published
2026-06-17 03:15 UTCUpdated Record last modified

reffers project reffers UPGRADE

Affected: <= 2020-12-01

Fixed in: newer than 2020-12-01

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2020-12-01 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade reffers

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-2020-36203?

reffers: upgrade to newer than 2020-12-01. Exact commands for each OS are on this page.

Is CVE-2020-36203 being exploited?

CVE-2020-36203 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-2020-36203 affect?

CVE-2020-36203 affects reffers. Severity is medium (CVSS 4.7). An issue was discovered in the reffers crate through 2020-12-01 for Rust. ARefss can contain a !Send,!Sync object, leading to a data race and memory corruption.

How urgent is CVE-2020-36203?

Priority 25/100. Public exploit reference

References

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