Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-16730
Red Hat Red Hat Enterprise Linux 10 — Dbus-broker: dbus-broker: session bus denial of service via emfile during peer setup
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U N N H 5.5 .0011 1.1 —
AFFECTED
Product Versions Fixed
Red Hat Enterprise Linux 10 unspecified 0:36-5.el10_2
Red Hat Enterprise Linux 9 unspecified 0:28-9.el9_8
Red Hat Update Infrastructure 5 unspecified 1788880445
Red Hat Update Infrastructure 5 unspecified 1788880464
Red Hat Update Infrastructure 5 unspecified 1788880456
Red Hat Update Infrastructure 5 unspecified 1788765051
Red Hat Update Infrastructure 5 unspecified 1788880581
Red Hat Hardened Images unspecified —
Red Hat OpenShift Container Platform 4 unspecified —
TIMELINE
Jul 23 Reserved by redhat
Jul 24 Published (CNA: redhat)
Aug 31 PATCH SHIPPED — CVE-2026-16730 (Red Hat Enterprise Linux 10). Fixed in Red Hat Enterprise Linux 10 0:36-5.el10_2.
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| July 23, 2026 | Reserved | Reserved by redhat |
| July 24, 2026 | Published | Published (CNA: redhat) |
| August 31, 2026 | PATCH SHIPPED | PATCH SHIPPED — CVE-2026-16730 (Red Hat Enterprise Linux 10). Fixed in Red Hat Enterprise Linux 10 0:36-5.el10_2. |
Affected
Affected products and packages — 9 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| 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 |
| Red Hat | Red Hat Hardened Images | — | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-16730 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
