# CVE-2026-16730

## Summary

- **CVE ID:** CVE-2026-16730
- **Severity:** MEDIUM
- **CVSS Score:** 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-755
- **Published:** Jul 24, 2026
- **Last Modified:** Sep 10, 2026

## Description

A flaw was found in dbus-broker. When the process file-descriptor limit is reached, EMFILE/ENFILE errors during peer setup (notably SO_PEERPIDFD) are handled as fatal failures, causing the broker to exit. A local attacker who can open many connections to the user session bus can trigger this and deny service to the desktop session. Flatpak applications can reach the host session bus through the dbus proxy.

## Affected Products

- Red Hat — Red Hat Enterprise Linux 10 (0:36-5.el10_2)
- Red Hat — Red Hat Enterprise Linux 9 (0:28-9.el9_8)
- Red Hat — Red Hat Update Infrastructure 5 (1788880445)
- Red Hat — Red Hat Update Infrastructure 5 (1788880464)
- Red Hat — Red Hat Update Infrastructure 5 (1788880456)
- Red Hat — Red Hat Update Infrastructure 5 (1788765051)
- Red Hat — Red Hat Update Infrastructure 5 (1788880581)

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2026-16730)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2506348)
- [CNA](https://github.com/bus1/dbus-broker/issues/435)
- [CNA](https://access.redhat.com/errata/RHSA-2026:61340)
- [CNA](https://access.redhat.com/errata/RHSA-2026:61355)
- [CNA](https://access.redhat.com/errata/RHSA-2026:66018)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.11%
- **EPSS Percentile:** 1.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._