CVE-2026-94422Hinoki check available

Sandbox escape via forged D-Bus reply serial

Published Oct 2, 2026 · Updated Oct 2, 2026

Message-filter bypass in xdg-dbus-proxy before 0.1.9 allows local users running sandboxed apps to execute code outside the sandbox. The proxy treats a method call or signal carrying a reply serial as an authorized reply and fails to bind a purported reply to its original caller. Exploitation requires a malicious or compromised app using the proxy to access the local D-Bus session bus; the bypass can cross the app's sandbox boundary.

CVSS severity8.7
High
EPSS probability0.69%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Message-filter bypass in xdg-dbus-proxy before 0.1.9 allows local users running sandboxed apps to execute code outside the sandbox. The proxy treats a method call or signal carrying a reply serial as an authorized reply and fails to bind a purported reply to its original caller. Exploitation requires a malicious or compromised app using the proxy to access the local D-Bus session bus; the bypass can cross the app's sandbox boundary.

The record

CVE
CVE-2026-94422
Published
Oct 2, 2026
Updated
Oct 2, 2026
Vendor
System Security Services Daemon
Product
Fedora Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.1.9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

System Security Services Daemon · Fedora Linuxversion=0 <0.1.9
Libslirp Project · xdg-dbus-proxyversion=0 <0.1.9
libuser Project · Red Hat Enterprise LinuxAffected versions are unavailable in this record.

Published CVSS scores

9.3SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
8.6Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
8.7xdg-dbus-proxy upstream advisoryCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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