CVE-2026-16730

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-07-24. a secondary CVSS source baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

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.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

July 24, 2026

Last Modified

September 10, 2026

Advisory Details (3)

Auto-updated Jul 24, 2026
Patch available. Sources: redhat.
generic

dbus-broker-launch shuts down when hitting user soft fd limit · Issue #435 · bus1/dbus-broker · GitHub

https://github.com/bus1/dbus-broker/issues/435
redhat

2506348 – (CVE-2026-16730) CVE-2026-16730 dbus-broker: dbus-broker: session bus denial of service via EMFILE during peer setup

https://bugzilla.redhat.com/show_bug.cgi?id=2506348
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-16730

Vendor Advisories for CVE-2026-16730(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhui5/rhua-rhel9:17888805812026-09-09redhat
redhatdbus-broker-0:36-5.el10_22026-08-31redhat
redhatdbus-broker-0:28-9.el9_82026-08-31redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
dbus-broker26-1 ... 37-5 (31 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
dbus-broker33-1 ... 37-5 (15 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
dbus-broker37-2, 37-3, 37-4, 37-5——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
dbus-broker37-2, 37-3, 37-4, 37-5——

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 15× in last 7d / 81× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 154 total refreshes for this CVE.

  1. 2026-09-18 03:02 UTCEG score recompute
  2. 2026-09-18 03:02 UTCVendor advisory
  3. 2026-09-18 03:02 UTCGHSA enrichment
  4. 2026-09-16 14:07 UTCEPSS rescore
  5. 2026-09-16 12:00 UTCVendor advisory
  6. 2026-09-16 12:00 UTCGHSA enrichment
  7. 2026-09-15 09:41 UTCEG score recompute
  8. 2026-09-15 09:41 UTCVendor advisory
  9. 2026-09-15 09:41 UTCGHSA enrichment
  10. 2026-09-14 02:31 UTCEG score recompute
  11. 2026-09-14 02:31 UTCVendor advisory
  12. 2026-09-14 02:31 UTCGHSA enrichment
  13. 2026-09-13 16:46 UTCEPSS rescore
  14. 2026-09-13 00:11 UTCVendor advisory
  15. 2026-09-13 00:11 UTCGHSA enrichment
  16. 2026-09-11 20:54 UTCEG score recompute
  17. 2026-09-11 20:54 UTCVendor advisory
  18. 2026-09-11 20:54 UTCGHSA enrichment
  19. 2026-09-11 14:52 UTCEPSS rescore
  20. 2026-09-11 09:36 UTCEPSS rescore
  21. 2026-09-10 18:24 UTCEG score recompute
  22. 2026-09-10 18:24 UTCVendor advisory
  23. 2026-09-10 18:24 UTCGHSA enrichment
  24. 2026-09-10 17:30 UTCEG score recompute
  25. 2026-09-10 17:30 UTCVendor advisory
Show 75 more
  1. 2026-09-10 17:30 UTCGHSA enrichment
  2. 2026-09-10 14:53 UTCEG score recompute
  3. 2026-09-10 14:53 UTCVendor advisory
  4. 2026-09-10 14:53 UTCGHSA enrichment
  5. 2026-09-10 09:34 UTCEPSS rescore
  6. 2026-09-09 08:51 UTCEG score recompute
  7. 2026-09-09 08:51 UTCVendor advisory
  8. 2026-09-09 08:51 UTCGHSA enrichment
  9. 2026-09-08 22:00 UTCEPSS rescore
  10. 2026-09-07 21:27 UTCEG score recompute
  11. 2026-09-07 21:27 UTCVendor advisory
  12. 2026-09-07 21:27 UTCGHSA enrichment
  13. 2026-09-06 13:47 UTCEPSS rescore
  14. 2026-09-05 19:26 UTCEG score recompute
  15. 2026-09-05 19:26 UTCVendor advisory
  16. 2026-09-05 19:26 UTCGHSA enrichment
  17. 2026-09-04 12:55 UTCEG score recompute
  18. 2026-09-04 12:55 UTCVendor advisory
  19. 2026-09-04 12:55 UTCGHSA enrichment
  20. 2026-09-04 05:06 UTCEPSS rescore
  21. 2026-09-02 14:11 UTCEPSS rescore
  22. 2026-09-01 23:19 UTCEG score recompute
  23. 2026-09-01 23:19 UTCVendor advisory
  24. 2026-09-01 23:19 UTCGHSA enrichment
  25. 2026-09-01 13:53 UTCEPSS rescore
  26. 2026-08-31 15:39 UTCEG score recompute
  27. 2026-08-31 15:39 UTCGHSA enrichment
  28. 2026-08-31 14:30 UTCEG score recompute
  29. 2026-08-31 14:30 UTCGHSA enrichment
  30. 2026-08-31 02:41 UTCEG score recompute
  31. 2026-08-31 02:41 UTCGHSA enrichment
  32. 2026-08-30 19:17 UTCEPSS rescore
  33. 2026-08-30 01:22 UTCEPSS rescore
  34. 2026-08-30 00:21 UTCEG score recompute
  35. 2026-08-30 00:21 UTCGHSA enrichment
  36. 2026-08-28 21:41 UTCEPSS rescore
  37. 2026-08-27 14:25 UTCEPSS rescore
  38. 2026-08-27 10:02 UTCEG score recompute
  39. 2026-08-27 10:02 UTCGHSA enrichment
  40. 2026-08-26 14:46 UTCEPSS rescore
  41. 2026-08-26 05:42 UTCEG score recompute
  42. 2026-08-26 05:42 UTCGHSA enrichment
  43. 2026-08-25 13:48 UTCEPSS rescore
  44. 2026-08-25 03:22 UTCEG score recompute
  45. 2026-08-25 03:22 UTCGHSA enrichment
  46. 2026-08-24 01:02 UTCEG score recompute
  47. 2026-08-24 01:02 UTCGHSA enrichment
  48. 2026-08-23 00:19 UTCEPSS rescore
  49. 2026-08-22 22:43 UTCGHSA enrichment
  50. 2026-08-21 20:23 UTCEG score recompute
  51. 2026-08-21 20:23 UTCGHSA enrichment
  52. 2026-08-21 20:10 UTCEG score recompute
  53. 2026-08-21 20:10 UTCGHSA enrichment
  54. 2026-08-21 00:04 UTCEG score recompute
  55. 2026-08-21 00:03 UTCGHSA enrichment
  56. 2026-08-20 22:55 UTCEPSS rescore
  57. 2026-08-19 21:44 UTCEG score recompute
  58. 2026-08-19 21:44 UTCGHSA enrichment
  59. 2026-08-19 17:03 UTCEPSS rescore
  60. 2026-08-18 18:55 UTCEG score recompute
  61. 2026-08-18 18:55 UTCGHSA enrichment
  62. 2026-08-18 13:48 UTCEPSS rescore
  63. 2026-08-17 15:28 UTCEG score recompute
  64. 2026-08-17 15:28 UTCGHSA enrichment
  65. 2026-08-17 13:47 UTCEPSS rescore
  66. 2026-08-16 14:56 UTCEPSS rescore
  67. 2026-08-16 13:09 UTCEG score recompute
  68. 2026-08-16 13:09 UTCGHSA enrichment
  69. 2026-08-16 02:14 UTCEPSS rescore
  70. 2026-08-15 10:50 UTCEG score recompute
  71. 2026-08-15 10:50 UTCGHSA enrichment
  72. 2026-08-15 01:30 UTCEPSS rescore
  73. 2026-08-14 08:30 UTCEG score recompute
  74. 2026-08-14 08:30 UTCGHSA enrichment
  75. 2026-08-14 07:49 UTCEG score recompute

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-16730?
CVE-2026-16730 is a medium vulnerability published on July 24, 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…
When was CVE-2026-16730 disclosed?
CVE-2026-16730 was first published in the National Vulnerability Database on July 24, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16730 actively exploited?
CVE-2026-16730 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 98.6% of all scored CVEs.
What is the CVSS score of CVE-2026-16730?
CVE-2026-16730 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-16730?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16730, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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