CVE-2020-36208: An issue was discovered in the conquer-once crate before 0.3.2 for Rust

Q: How do I fix CVE-2020-36208?

conquer-once: upgrade to 0.3.2. Exact commands for each OS are on this page.

Q: Is CVE-2020-36208 being exploited?

CVE-2020-36208 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-2020-36208 affect?

CVE-2020-36208 affects conquer-once. Severity is high (CVSS 7.8). An issue was discovered in the conquer-once crate before 0.3.2 for Rust. Thread crossing can occur for a non-Send but Sync type, leading to memory corruption.

Q: How urgent is CVE-2020-36208?

Priority 42/100. High severity; Public exploit reference

This month

HIGH 7.8UPGRADE

CVE-2020-36208 is a high-severity flaw (CVSS 7.8) affecting conquer-once. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in the conquer-once crate before 0.3.2 for Rust. Thread crossing can occur for a non-Send but Sync type, leading to memory corruption.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-662, CWE-787
Published	2021-01-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: conquer-once 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

conquer-once project conquer-once UPGRADE

Affected: < 0.3.2

Fixed in: 0.3.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy conquer-once || rpm -q conquer-once || conquer-once --version

2. UPGRADE to 0.3.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade conquer-once

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade conquer-once

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-2020-36208?

conquer-once: upgrade to 0.3.2. Exact commands for each OS are on this page.

Is CVE-2020-36208 being exploited?

CVE-2020-36208 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-2020-36208 affect?

CVE-2020-36208 affects conquer-once. Severity is high (CVSS 7.8). An issue was discovered in the conquer-once crate before 0.3.2 for Rust. Thread crossing can occur for a non-Send but Sync type, leading to memory corruption.

How urgent is CVE-2020-36208?

Priority 42/100. High severity; Public exploit reference

References

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