Threat Intelligence / CVE / CVE-2024-6387

CVE-2024-6387 — Red Hat Enterprise Linux 9

CVSS v3.1 8.1 (HIGH) · EPSS 99.5% (higher than 99.9% of all scored CVEs) · Priority 10/10 · Published 2024-07-01

As of 2026-09-01, CVE-2024-6387 is a HIGH-severity vulnerability in Red Hat Enterprise Linux 9, CVSS v3.1 8.1, EPSS 99.5% (99.9th percentile). Threadlinqs Intelligence links 2 tracked threat campaigns to CVE-2024-6387, most recently “EtherHiding: Blockchain-Based C2 on Polygon Fuels ClickFix Backdoor + Banking-Trojan Extension Campaign Adopted by Criminal, North Korean, and Iran-Linked Actors”.

Last updated: 2026-09-01

What is CVE-2024-6387?

A security regression (CVE-2006-5051) was discovered in OpenSSH's server (sshd). There is a race condition which can lead sshd to handle some signals in an unsafe manner. An unauthenticated, remote attacker may be able to trigger it by failing to authenticate within a set time period.

The record classifies CVE-2024-6387 under weakness class CWE-364. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 12 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 813 days ago.

Severity and exploitation probability

CVSS v3.1 base score
8.1 — HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (FIRST)
99.5% probability of exploitation in the next 30 days, higher than 99.9% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
10/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2024-07-01, last modified 2026-09-01

Is CVE-2024-6387 being exploited?

Weaponised exploit code for CVE-2024-6387 is publicly available. 11 public proof-of-concept repositories are tracked for this identifier.

Affected products and versions

How to fix CVE-2024-6387

No vendor patch reference has been recorded for CVE-2024-6387 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2024-6387

2 tracked threats in the Threadlinqs corpus reference CVE-2024-6387, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, FIRST EPSS, public proof-of-concept repositories. Last verified by Threadlinqs on .

Vendor advisory and patch

Third-party advisory

Other references

Showing 10 of 12 recorded references.

Full detection coverage & IOCs for threats exploiting CVE-2024-6387 are available via the Threadlinqs MCP server (Purple tier). View plans →

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