● Medium · CVSS 5.9

How to Fix CVE-2026-22715: Cwe-923 improper restriction of communication channel to intended endpoints in Workstation

Q: What is the CVSS score for CVE-2026-22715?

5.9 (Medium). Vector: `CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L`.

Q: Where is the official advisory for CVE-2026-22715?

The vendor advisory is at [https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/36986](https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/36986). The NVD record is at https://nvd.nist.gov/vuln/detail/CVE-2026-22715.

By Sai Kiran Pandrala. Last verified: 2026-05-25.

CVE-2026-22715 is a cwe-923 improper restriction of communication channel to intended endpoints in VMware Workstation. The fix is to upgrade to Fusion 25H2U1; Workstation 25H2U1.

⚡ At a glance


Severity	5.9 (Medium)
Actively exploited?	No public listing in CISA KEV
Affected	Workstation 17.0 to <25H2U1; Fusion 13.0 to <25H2U1
Fixed in	Fusion 25H2U1; Workstation 25H2U1
Type (CWE)	CWE-923 Improper Restriction of Communication Channel to Intended Endpoints

What is CVE-2026-22715?

VMWare Workstation and Fusion contain a logic flaw in the management of network packets.

Known attack vectors: A malicious actor with administrative privileges on a Guest VM may be able to interrupt or intercept network connections of other Guest VM's.

Resolution: To remediate CVE-2026-22715 please upgrade to VMware Workstation or Fusion Version 25H2U1 The CVSS base score is 5.9 (Medium). The official advisory is at https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/36986.

Am I affected?

Check the version of Workstation you are running and compare it against the Affected row above (Workstation 17.0 to <25H2U1; Fusion 13.0 to <25H2U1). If your build sits inside the affected range, you must patch.

Run the version check that fits your platform:


# Linux package check
dpkg -s workstation 2>/dev/null | grep -i ^Version
rpm -q workstation 2>/dev/null
command -v workstation >/dev/null && workstation --version 2>/dev/null


# Windows (PowerShell)
Get-Package -Name "*Workstation*" -ErrorAction SilentlyContinue | Select-Object Name, Version
winget list --name "Workstation" 2>$null

How to fix CVE-2026-22715

Upgrade Workstation to a patched build: Fusion 25H2U1; Workstation 25H2U1. The vendor advisory is the source of truth for the exact fixed version.

Ubuntu / Debian


sudo apt-get update
sudo apt-get install --only-upgrade workstation
dpkg -s workstation | grep -i ^Version

RHEL / CentOS / Rocky / AlmaLinux


sudo dnf upgrade --refresh workstation -y
# or for older releases:
sudo yum update workstation -y
rpm -q workstation

SUSE / openSUSE


sudo zypper refresh
sudo zypper update workstation
rpm -q workstation

Complete PowerShell remediation script (Windows)


# Fix script for CVE-2026-22715 affecting Workstation
# Run as administrator. Detect -> backup -> upgrade -> verify -> log.

$ErrorActionPreference = "Stop"
$LogPath  = "C:\Logs\CVE-2026-22715-fix-$(Get-Date -Format yyyyMMdd-HHmmss).log"
New-Item -ItemType Directory -Force (Split-Path $LogPath) | Out-Null
Start-Transcript -Path $LogPath -Append

try {
    Write-Host "[1/4] Detect installed version"
    $pkg = Get-Package -Name "*Workstation*" -ErrorAction SilentlyContinue
    if ($pkg) { $pkg | Format-Table Name, Version }
    else { Write-Host "Not detected via Get-Package; try winget list" }

    Write-Host "[2/4] Backup configuration"
    $backup = "C:\Backup\workstation-$(Get-Date -Format yyyyMMdd)"
    New-Item -ItemType Directory -Force $backup | Out-Null
    Get-ChildItem "C:\ProgramData\Workstation" -ErrorAction SilentlyContinue |
        Copy-Item -Destination $backup -Recurse -Force -ErrorAction SilentlyContinue

    Write-Host "[3/4] Apply the upgrade to Fusion 25H2U1; Workstation 25H2U1"
    winget upgrade --name "Workstation" --silent --accept-source-agreements --accept-package-agreements
    if ($LASTEXITCODE -ne 0) {
        # Fallback: pull latest via OS update channel
        Install-Module -Name PSWindowsUpdate -Force -SkipPublisherCheck -ErrorAction SilentlyContinue
        Import-Module PSWindowsUpdate
        Install-WindowsUpdate -MicrosoftUpdate -AcceptAll -IgnoreReboot
    }

    Write-Host "[4/4] Verify the patched build"
    winget list --name "Workstation"
    Write-Host "Patch applied. Reboot if prompted."
    exit 0
} catch {
    Write-Error "Patch failed: $_"
    exit 1
} finally {
    Stop-Transcript
}

Complete Bash remediation script (Linux)


#!/usr/bin/env bash
# Fix script for CVE-2026-22715 affecting Workstation
# Detect -> backup -> upgrade -> verify -> log.

set -euo pipefail
LOG="/var/log/cve-2026-22715-fix-$(date +%Y%m%d-%H%M%S).log"
exec > >(tee -a "$LOG") 2>&1

echo "[1/4] Detect installed version"
if command -v dpkg >/dev/null; then
    dpkg -s workstation 2>/dev/null | grep -i ^Version || echo "workstation not installed via dpkg"
elif command -v rpm >/dev/null; then
    rpm -q workstation || echo "workstation not installed via rpm"
fi

echo "[2/4] Backup configuration"
BACKUP="/root/backup-cve-2026-22715-$(date +%Y%m%d)"
mkdir -p "$BACKUP"
for d in /etc/workstation /etc/workstation.d /etc/workstation.conf; do
    [ -e "$d" ] && cp -a "$d" "$BACKUP/" || true
done

echo "[3/4] Apply the upgrade (target: Fusion 25H2U1; Workstation 25H2U1)"
if command -v apt-get >/dev/null; then
    apt-get update
    apt-get install --only-upgrade -y workstation
elif command -v dnf >/dev/null; then
    dnf upgrade --refresh -y workstation
elif command -v yum >/dev/null; then
    yum update -y workstation
elif command -v zypper >/dev/null; then
    zypper --non-interactive update workstation
fi

echo "[4/4] Verify the patched build"
if command -v dpkg >/dev/null; then
    dpkg -s workstation 2>/dev/null | grep -i ^Version
elif command -v rpm >/dev/null; then
    rpm -q workstation
fi
echo "Done. Restart any service that loaded the old library."

If you can't patch immediately

Apply at least one of the following inline controls until you can deploy the patched build. None replace the upgrade.

Restrict exposure with nftables (Linux)


# Allow only trusted CIDR to reach the affected service ports
sudo nft add table inet filter 2>/dev/null || true
sudo nft 'add chain inet filter input { type filter hook input priority 0 ; }' 2>/dev/null || true
sudo nft 'add rule inet filter input tcp dport {80, 443} ip saddr != 10.0.0.0/8 drop'
sudo nft list ruleset

Block at the host firewall (Windows)


New-NetFirewallRule -DisplayName "Block-CVE-2026-22715" -Direction Inbound -Action Block -Protocol TCP -LocalPort 80,443 -RemoteAddress Any -Enabled True
Get-NetFirewallRule -DisplayName "Block-CVE-2026-22715"

Disable the affected service (Linux)


sudo systemctl stop workstation 2>/dev/null || true
sudo systemctl disable workstation 2>/dev/null || true

If the vendor advisory lists an official workaround, prefer that wording verbatim. If no workaround is published, the only safe remediation is the patch.

How to verify the fix worked

After upgrading, confirm the installed version matches the patched build and that no old library is still loaded by a long-running process.


# Linux
dpkg -s workstation 2>/dev/null | grep -i ^Version
rpm -q workstation 2>/dev/null || true
# Pid map check for old library handles
sudo lsof +c0 2>/dev/null | grep -i "DEL.*lib" || true


# Windows
Get-Package -Name "*Workstation*" | Select-Object Name, Version
Get-HotFix | Sort-Object InstalledOn -Descending | Select-Object -First 5

Expected: the reported version is at or above Fusion 25H2U1; Workstation 25H2U1. Restart the affected service (systemctl restart <service> on Linux, or restart the Windows service) so it loads the patched binary.

Frequently asked questions

Other vulnerabilities in the same area that are worth patching alongside this one:

How to Fix CVE-2026-41702: Race Condition in Fusion — Race Condition in Fusion
How to Fix CVE-2026-41712: Information Disclosure in Spring AI — Information Disclosure in Spring AI
How to Fix CVE-2026-22720: Cross-site scripting in VMware Aria Operations , Cross-site scripting in VMware Aria Operations
How to Fix CVE-2026-22750: External control of system or configuration in Spring Cloud Gateway , External control of system or configuration in Spring Cloud Gateway
How to Fix CVE-2026-20879: Out-of-Bounds Write in Intel(R) Data Center Graphics Driver for VMware ESXi software , Out-of-Bounds Write in Intel(R) Data Center Graphics Driver for VMware ESXi software

Is CVE-2026-22715 actively exploited?

There is no public confirmation of exploitation in the wild listed in CISA KEV at the time of this writing. Patch anyway. Public exploits commonly follow disclosure within weeks.

Do I need to reboot after patching CVE-2026-22715?

For kernel and OS-level updates, yes. For most userland packages a systemctl restart <service> is enough on Linux, and restarting the Windows service or app on Windows. Any process that loaded the old library keeps using it until restarted.

What is the CVSS score for CVE-2026-22715?

5.9 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L.

Where is the official advisory for CVE-2026-22715?

The vendor advisory is at https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/36986. The NVD record is at https://nvd.nist.gov/vuln/detail/CVE-2026-22715.

References

Official vendor advisory: https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/36986
NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-22715
CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

*Written by Sai Kiran Pandrala. Assembled from the official vendor advisory, NVD record, and CISA KEV listing on 2026-05-25. Always confirm against the vendor's advisory before applying changes in production.*