CVE-2026-53364

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

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, GitHub Security Advisory, NVD CVSS v3
5.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.5Exploit: None knownExposed services: Not assessed

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
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

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 (value × EchelonGraph’s weight)
Severity55% × 45%
The EG Score, 5.5 of 10.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 13, 2026

Last Modified

August 3, 2026

Advisory Details (3)

Auto-updated Jul 22, 2026
Patch available.
Web page

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
Web page

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
Web page

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(11)

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

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (142 versions)
  • every version up to 7.0.12-1: fixed in 7.0.12-1
—

Weakness Classification(1)

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

All Vendor Advisories

(11)

Data Freshness Timeline

(refreshed 11× in last 7d / 43× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 208 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 108 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  3. 2026-10-12 15:57 UTCEG score recompute
  4. 2026-10-11 19:40 UTCEG score recompute
  5. 2026-10-11 16:55 UTCEG score recompute
  6. 2026-10-11 14:19 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  15. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  16. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  18. 2026-10-01 14:12 UTCEG score recompute
  19. 2026-10-01 14:12 UTCVendor advisory
  20. 2026-10-01 14:12 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  21. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  22. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  23. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  24. 2026-09-28 09:30 UTCEG score recompute
  25. 2026-09-28 09:30 UTCVendor advisory
Show 75 more
  1. 2026-09-28 09:30 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  2. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  3. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  4. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  5. 2026-09-24 10:05 UTCEG score recompute
  6. 2026-09-24 10:05 UTCVendor advisory
  7. 2026-09-24 10:05 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  8. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-09-23 04:18 UTCEG score recompute
  10. 2026-09-23 04:18 UTCVendor advisory
  11. 2026-09-23 04:18 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  12. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-09-18 05:01 UTCEG score recompute
  15. 2026-09-18 05:01 UTCVendor advisory
  16. 2026-09-18 05:01 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  17. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-09-14 07:52 UTCEG score recompute
  20. 2026-09-14 07:52 UTCVendor advisory
  21. 2026-09-14 07:52 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  22. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-09-13 07:59 UTCVendor advisory
  24. 2026-09-13 07:59 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  25. 2026-09-12 01:51 UTCEG score recompute
  26. 2026-09-12 01:51 UTCVendor advisory
  27. 2026-09-12 01:51 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  28. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  29. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  30. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  31. 2026-09-08 01:55 UTCEG score recompute
  32. 2026-09-08 01:55 UTCVendor advisory
  33. 2026-09-08 01:55 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  34. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  35. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  36. 2026-09-05 21:25 UTCEG score recompute
  37. 2026-09-05 21:25 UTCVendor advisory
  38. 2026-09-05 21:24 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  39. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  40. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  41. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  42. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  43. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  44. 2026-08-30 05:29 UTCEG score recompute
  45. 2026-08-30 05:29 UTCVendor advisory
  46. 2026-08-30 05:28 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  47. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  48. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  49. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  50. 2026-08-27 14:00 UTCEG score recompute
  51. 2026-08-27 14:00 UTCVendor advisory
  52. 2026-08-27 14:00 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  53. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  54. 2026-08-26 12:51 UTCEG score recompute
  55. 2026-08-26 12:51 UTCVendor advisory
  56. 2026-08-26 12:51 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  57. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  58. 2026-08-25 09:47 UTCEG score recompute
  59. 2026-08-25 09:47 UTCVendor advisory
  60. 2026-08-25 09:47 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  61. 2026-08-24 09:54 UTCEG score recompute
  62. 2026-08-24 09:54 UTCVendor advisory
  63. 2026-08-24 09:54 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  64. 2026-08-23 10:01 UTCEG score recompute
  65. 2026-08-23 10:01 UTCVendor advisory
  66. 2026-08-23 10:01 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  67. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  68. 2026-08-22 10:08 UTCEG score recompute
  69. 2026-08-22 10:08 UTCVendor advisory
  70. 2026-08-22 10:08 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  71. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  72. 2026-08-21 10:10 UTCEG score recompute
  73. 2026-08-21 10:10 UTCVendor advisory
  74. 2026-08-21 10:10 UTCGHSA enrichmentGHSA-pc8p-4pfj-fgm2 · GitHub CVSS 5.5
  75. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 1st percentile

Frequently asked(5)

What is CVE-2026-53364?
CVE-2026-53364 is a medium-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-53364 published?
The CVE record for CVE-2026-53364 was published on July 13, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 3, 2026; the record at its source may have been updated since.
Is CVE-2026-53364 actively exploited?
CVE-2026-53364 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-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?
A fix for CVE-2026-53364 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-53364 are linked in the Vendor Advisories panel on this page.

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