CVE-2018-18206: In the client in Bytom before 1.0.6, checkTopicRegister in p2p/discover/net.go does not prevent negative idx v

Q: How do I fix CVE-2018-18206?

bytom: upgrade to 1.0.6. Exact commands for each OS are on this page.

Q: Is CVE-2018-18206 being exploited?

CVE-2018-18206 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-2018-18206 affect?

CVE-2018-18206 affects bytom. Severity is high (CVSS 7.5). In the client in Bytom before 1.0.6, checkTopicRegister in p2p/discover/net.go does not prevent negative idx values, leading to a crash.

Q: How urgent is CVE-2018-18206?

Priority 50/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2018-18206 is a high-severity flaw (CVSS 7.5) affecting bytom. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In the client in Bytom before 1.0.6, checkTopicRegister in p2p/discover/net.go does not prevent negative idx values, leading to a crash.

Why this priority

High severity
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-190
Published	2018-10-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: bytom

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

Am I affected?

Timeline

2018-10-10 09:29 UTCPublished CVE record published
2026-06-17 01:46 UTCUpdated Record last modified

bytom bytom UPGRADE

Affected: < 1.0.6

Fixed in: 1.0.6

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.0.6 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bytom

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-2018-18206?

bytom: upgrade to 1.0.6. Exact commands for each OS are on this page.

Is CVE-2018-18206 being exploited?

CVE-2018-18206 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-2018-18206 affect?

CVE-2018-18206 affects bytom. Severity is high (CVSS 7.5). In the client in Bytom before 1.0.6, checkTopicRegister in p2p/discover/net.go does not prevent negative idx values, leading to a crash.

How urgent is CVE-2018-18206?

Priority 50/100. High severity; Remotely exploitable, no login, no user action

References

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