CVE-2023-42374: An issue in mystenlabs Sui Blockchain before v.1.6.3 allow a remote attacker to execute arbitrary code and cau

Q: How do I fix CVE-2023-42374?

sui: upgrade to 1.6.3. Exact commands for each OS are on this page.

Q: Is CVE-2023-42374 being exploited?

CVE-2023-42374 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-2023-42374 affect?

CVE-2023-42374 affects sui. Severity is critical (CVSS 9.8). An issue in mystenlabs Sui Blockchain before v.1.6.3 allow a remote attacker to execute arbitrary code and cause a denial of service via a crafted compressed script to the Sui node component.

Q: How urgent is CVE-2023-42374?

Priority 57/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2023-42374 is a critical-severity flaw (CVSS 9.8) affecting sui. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue in mystenlabs Sui Blockchain before v.1.6.3 allow a remote attacker to execute arbitrary code and cause a denial of service via a crafted compressed script to the Sui node component.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Weakness	CWE-94
Published	2024-02-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mystenlabs

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

Am I affected?

Timeline

2024-02-13 01:15 UTCPublished CVE record published
2026-06-17 06:23 UTCUpdated Record last modified

mystenlabs sui UPGRADE

Affected: < 1.6.3

Fixed in: 1.6.3

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.6.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sui

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-2023-42374?

sui: upgrade to 1.6.3. Exact commands for each OS are on this page.

Is CVE-2023-42374 being exploited?

CVE-2023-42374 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-2023-42374 affect?

CVE-2023-42374 affects sui. Severity is critical (CVSS 9.8). An issue in mystenlabs Sui Blockchain before v.1.6.3 allow a remote attacker to execute arbitrary code and cause a denial of service via a crafted compressed script to the Sui node component.

How urgent is CVE-2023-42374?

Priority 57/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-36184 HIGH 7.5 UPGRADE MITIGATE CMysten Labs Sui blockchain v1.2.0 was discovered to contain a stack overflow via the component /spec/openrpc.

References

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