CVE-2026-53364

MEDIUMNVD 5.55.5—
EchelonGraph scoreHIGH confidence

Score 5.5 from GitHub Security Advisory published 2026-07-13. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 5 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.

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_conn: Fix memory leak in hci_le_big_terminate()

hci_le_big_terminate() allocates iso_list_data via kzalloc_obj but returns 0 without freeing it when neither pa_sync_term nor big_sync_term flags are set after evaluating the PA and BIG sync connection state.

This early-return path was introduced when hci_le_big_terminate() was refactored to take struct hci_conn instead of raw u8 parameters, adding PA/BIG flag evaluation logic. The existing kfree() on hci_cmd_sync_queue failure does not cover this path.

CVSS v3
5.5
EG Score
5.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

July 13, 2026

Last Modified

July 22, 2026

Advisory Details (3)

Auto-updated Jul 22, 2026
No patch confirmed yet.
generic

Bluetooth: hci_conn: Fix memory leak in hci_le_big_terminate() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e6b78019664dfe37c3dc707f50e7b453d6c7726d
generic

Bluetooth: hci_conn: Fix memory leak in hci_le_big_terminate() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bfa9d28960ed677d556bdf097073bc3129686229
generic

Bluetooth: hci_conn: Fix memory leak in hci_le_big_terminate() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a59d4f4217e6200ca9180643e5738a87d3fa8be0

Vendor Advisories for CVE-2026-53364(1)

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

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-07-26ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-07-26ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-07-26ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-07-26ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-07-26ubuntu

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.

Weakness Classification(1)

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

All Vendor Advisories

(5)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 14× in last 7d / 26× 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.

  1. 2026-07-27 11:45 UTCEG score recompute
  2. 2026-07-27 11:45 UTCGHSA enrichment
  3. 2026-07-26 14:54 UTCEPSS rescore
  4. 2026-07-26 11:52 UTCEG score recompute
  5. 2026-07-26 11:52 UTCVendor advisory
  6. 2026-07-26 11:52 UTCGHSA enrichment
  7. 2026-07-24 14:18 UTCEPSS rescore
  8. 2026-07-23 14:18 UTCEPSS rescore
  9. 2026-07-23 03:19 UTCEG score recompute
  10. 2026-07-22 20:54 UTCEG score recompute▲ 5.50
  11. 2026-07-22 20:54 UTCGHSA enrichment
  12. 2026-07-22 20:52 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  13. 2026-07-22 14:08 UTCEPSS rescore
  14. 2026-07-21 15:25 UTCEPSS rescore
  15. 2026-07-20 17:08 UTCEPSS rescore
  16. 2026-07-19 14:31 UTCEPSS rescore
  17. 2026-07-19 14:31 UTCEPSS rescore
  18. 2026-07-16 17:03 UTCEPSS rescore
  19. 2026-07-16 15:29 UTCGHSA enrichment
  20. 2026-07-15 16:57 UTCEPSS rescore
  21. 2026-07-15 16:57 UTCEPSS rescore
  22. 2026-07-15 02:00 UTCEPSS rescore
  23. 2026-07-15 02:00 UTCEPSS rescore
  24. 2026-07-13 18:25 UTCNVD update
  25. 2026-07-13 17:53 UTCEG score recompute
Show 1 more
  1. 2026-07-13 17:52 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-53364?
CVE-2026-53364 is a medium vulnerability published on July 13, 2026. In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hciconn: Fix memory leak in hcilebigterminate() hcilebigterminate() allocates isolistdata via kzallocobj but returns 0 without freeing it when neither pasyncterm nor bigsyncterm flags are set after evaluating the PA and…
When was CVE-2026-53364 disclosed?
CVE-2026-53364 was first published in the National Vulnerability Database on July 13, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53364 actively exploited?
CVE-2026-53364 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 98.3% of all scored CVEs.
What is the CVSS score of CVE-2026-53364?
CVE-2026-53364 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-53364?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53364, 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

Explore the affected products and dependency analysis for CVE-2026-53364

Explore →

Is Your Infrastructure Affected by CVE-2026-53364?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs