CVE-2021-25903: An issue was discovered in the cache crate through 2021-01-01 for Rust

Q: How do I fix CVE-2021-25903?

cache: upgrade to newer than 0.2.0. Exact commands for each OS are on this page.

Q: Is CVE-2021-25903 being exploited?

CVE-2021-25903 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-2021-25903 affect?

CVE-2021-25903 affects cache. Severity is high (CVSS 7.5). An issue was discovered in the cache crate through 2021-01-01 for Rust. A raw pointer is dereferenced.

Q: How urgent is CVE-2021-25903?

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

This week

HIGH 7.5REMOTEUPGRADE

CVE-2021-25903 is a high-severity flaw (CVSS 7.5) affecting cache. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in the cache crate through 2021-01-01 for Rust. A raw pointer is dereferenced.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Weakness	CWE-476
Published	2021-01-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cache 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 18:16 UTCPublished CVE record published
2026-06-17 03:42 UTCUpdated Record last modified

cache project cache UPGRADE

Affected: <= 0.2.0

Fixed in: newer than 0.2.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 0.2.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cache

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-2021-25903?

cache: upgrade to newer than 0.2.0. Exact commands for each OS are on this page.

Is CVE-2021-25903 being exploited?

CVE-2021-25903 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-2021-25903 affect?

CVE-2021-25903 affects cache. Severity is high (CVSS 7.5). An issue was discovered in the cache crate through 2021-01-01 for Rust. A raw pointer is dereferenced.

How urgent is CVE-2021-25903?

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

Related CVEs

CVE-2020-36448 HIGH 8.1 UPGRADE An issue was discovered in the cache crate through 2020-11-24 for Rust
CVE-2018-17152 MEDIUM 6.4 DOWNGRADE Intersystems Cache 2017.2.2.865.0 allows XXE.
CVE-2018-17151 MEDIUM 5.4 DOWNGRADE Intersystems Cache 2017.2.2.865.0 has Incorrect Access Control.
CVE-2018-17150 MEDIUM 6.1 DOWNGRADE Intersystems Cache 2017.2.2.865.0 allows XSS.

References

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