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CVE-2020-25796: An issue was discovered in the sized-chunks crate through 0.6.2 for Rust

55
This week
HIGH 7.5REMOTEUPGRADE

CVE-2020-25796 is a high-severity flaw (CVSS 7.5) affecting sized-chunks. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in the sized-chunks crate through 0.6.2 for Rust. In the InlineArray implementation, an unaligned reference may be generated for a type that has a large alignment requirement.

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 score7.5 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance1.7% (top 23%)
CISA exploited listNo
WeaknessCWE-129
Published2020-09-19
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: sized-chunks project

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

Am I affected?

Timeline

sized-chunks project sized-chunks UPGRADE
Affected: <= 0.6.2
Fixed in: newer than 0.6.2
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy sized-chunks || rpm -q sized-chunks || sized-chunks --version
2. UPGRADE to newer than 0.6.2 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade sized-chunks
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade sized-chunks
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-2020-25796?

sized-chunks: upgrade to newer than 0.6.2. Exact commands for each OS are on this page.

Is CVE-2020-25796 being exploited?

CVE-2020-25796 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-2020-25796 affect?

CVE-2020-25796 affects sized-chunks. Severity is high (CVSS 7.5). An issue was discovered in the sized-chunks crate through 0.6.2 for Rust. In the InlineArray implementation, an unaligned reference may be generated for a type that has a large alignment requirement.

How urgent is CVE-2020-25796?

Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

References

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