CVE catalog
CVE-2026-16730
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 e
- Severity
- Medium · CVSS 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.15% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | dbus-broker | sid | 37-5 | vulnerable |
| Debian | dbus-broker | forky | 37-5 | vulnerable |
| Debian | dbus-broker | trixie | 37-2 | vulnerable |
| Debian | dbus-broker | bookworm | 33-1 | vulnerable |
| Ubuntu | dbus-broker | 22.04 | 29-1 | vulnerable |
| Ubuntu | dbus-broker | 22.04 | 29-3 | vulnerable |
| Ubuntu | dbus-broker | 22.04 | 29-4 | vulnerable |
| Ubuntu | dbus-broker | 22.04 | 29-4build1 | vulnerable |
| Ubuntu | dbus-broker | 24.04 | 33-1ubuntu1 | vulnerable |
| Ubuntu | dbus-broker | 24.04 | 35-2 | vulnerable |
| Ubuntu | dbus-broker | 24.04 | 35-2ubuntu0.1 | vulnerable |
| Ubuntu | dbus-broker | 26.04 | 37-2 | vulnerable |
| Ubuntu | dbus-broker | 26.04 | 37-3 | vulnerable |
| Ubuntu | dbus-broker | 26.04 | 37-4 | vulnerable |
| Ubuntu | dbus-broker | 26.04 | 37-5 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | dbus-broker | source | sid | (unfixed) | not yet assigned | Not reported | [1142850] |
| Debian | dbus-broker | source | forky | (unfixed) | not yet assigned | Not reported | [1142850] |
| Debian | dbus-broker | source | trixie | (unfixed) | not yet assigned | Not reported | [1142850] |
| Debian | dbus-broker | source | bookworm | (unfixed) | not yet assigned | Not reported | [1142850] |
Notes
[trixie] dbus-broker: Minor issue [bookworm] dbus-broker: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [dbus-broker]Affected
Details (4)
33-1· amd64 · bookwormAffected
nvd · dbus-broker · debian · bookworm; nvd · dbus-broker · debian · 12
33-1· arm64 · bookwormAffected
nvd · dbus-broker · debian · bookworm; nvd · dbus-broker · debian · 12
37-2~bpo12+1· amd64 · bookworm-backportsAffected
nvd · dbus-broker · debian · bookworm; nvd · dbus-broker · debian · 12
37-2~bpo12+1· arm64 · bookworm-backportsAffected
nvd · dbus-broker · debian · bookworm; nvd · dbus-broker · debian · 12
[Debian 13 (Trixie)]
- [dbus-broker]Affected
Details (2)
37-2· amd64 · trixieAffected
nvd · dbus-broker · debian · 13
37-2· arm64 · trixieAffected
nvd · dbus-broker · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2026_61340.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-16730]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-16730]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-16730]
- [https://security-tracker.debian.org/tracker/CVE-2026-16730]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-16730.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3095.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]