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TI-2020-14306 Aliases CVE-2020-22218GHSA-4wvm-v4fc-prp5

An issue was discovered in function _libssh2_packet_add in libssh2 1.10.0 allows…

Priority MEDIUM 41CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 7 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

An issue was discovered in function _libssh2_packet_add in libssh2 1.10.0 allows attackers to access out of bounds memory.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01155 67th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 7 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:libssh2:libssh2:1.10.0:*:*:*:*:*:*:*1.10.0VulnerableThe libssh2 Project
  • cpe:2.3:a:libssh2:libssh2:1.10.0:*:*:*:*:*:*:* Versions 1.10.0 Vulnerable ·The libssh2 Project

Remediation

Red Hat 1 advisory

  • RHSA-2023:5615 Released 2023-10-10 · Red Hat rating Moderate
    libssh2 security update
    • Red Hat Enterprise Linux Client (v. 7) libssh2-1.8.0-4.el7_9.1
    • Red Hat Enterprise Linux Client Optional (v. 7) libssh2-devel-1.8.0-4.el7_9.1, libssh2-docs-1.8.0-4.el7_9.1
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libssh2-devel-1.8.0-4.el7_9.1, libssh2-docs-1.8.0-4.el7_9.1
    • Red Hat Enterprise Linux Server (v. 7) libssh2-1.8.0-4.el7_9.1, libssh2-1.8.0-4.el7_9.1.ppc
    • Red Hat Enterprise Linux Server Optional (v. 7) libssh2-devel-1.8.0-4.el7_9.1, libssh2-devel-1.8.0-4.el7_9.1.ppc, libssh2-docs-1.8.0-4.el7_9.1
    • Red Hat Enterprise Linux Workstation (v. 7) libssh2-1.8.0-4.el7_9.1
    • Red Hat Enterprise Linux Workstation Optional (v. 7) libssh2-devel-1.8.0-4.el7_9.1, libssh2-docs-1.8.0-4.el7_9.1

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2023:5615
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2023:5615
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2023:5615
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2023:5615
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2023:5615
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2023:5615
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2023:5615

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-22218
  2. 2026-10-03 Alias added: GHSA-4wvm-v4fc-prp5

References

Patch 1

Other 2

  • TI-2026-39880 libssh2 - Out-of-Bounds Write via Unchecked packet_length in transport.c CVSS 4.0CRITICAL 9.2
  • TI-2026-06681 libssh2 userauth.c userauth_password integer overflow CVSS 4.0MEDIUM 6.9
  • TI-2023-26623 The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6… CVSS 3.1MEDIUM 5.9
  • TI-2026-41806 libssh2 - Free of Uninitialized Pointer in publickey List Cleanup CVSS 4.0HIGH 8.3
  • TI-2019-02869 Out-of-bounds read in libssh2 CVSS 3.1CRITICAL 9.1
  • TI-2019-02865 Integer overflow in libssh2 CVSS 3.1HIGH 8.8
See all 24 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences