Vulnerability in Red Hat Enterprise Linux 10
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 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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.001 (1.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-16730 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- github.com/bus1/dbus-broker/issues/435
- access.redhat.com/errata/RHSA-2026:61340 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:61355 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:66018 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-16730?
- CVE-2026-16730 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Improper Handling of Exceptional Conditions. CVSS score: 5.5/10. Published 2026-07-24.
- How severe is CVE-2026-16730?
- Medium severity. CVSS v3 base score is 5.5 out of 10.