CVE-2026-53072

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER

When protocol sets HCI_PROTO_DEFER, hci_conn_request_evt() calls hci_connect_cfm(conn) without hdev->lock. Generally hci_connect_cfm() assumes it is held, and if conn is deleted concurrently -> UAF.

Only SCO and ISO set HCI_PROTO_DEFER and only for defer setup listen, and HCI_EV_CONN_REQUEST is not generated for ISO. In the non-deferred listening socket code paths, hci_connect_cfm(conn) is called with hdev->lock held.

Fix by holding the lock.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

June 24, 2026

Last Modified

July 21, 2026

Advisory Details (8)

Auto-updated Jun 28, 2026
No patch confirmed yet.
generic

Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c7777f534a8018ae4bb1c80d8925af4df588a314
generic

Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c27224daf0b08efbb2b24ed64b6139b294f5473a
generic

Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e
generic

Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6b4d226d01ab7da0d2027a2a1e3a6079152e5065
generic

Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4
generic

Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5c7209a341ff2ac338b2b0375c34a307b37c9ac2
generic

Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f
generic

Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/385b2d0468a0871fc716c549fa3b0c257c7dbcb3

Vendor Advisories for CVE-2026-53072(2)

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

Patch Availability(21)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-07-28ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-07-28ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-07-28ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-07-28ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-07-28ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-07-28ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-07-28ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-07-28ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-07-28ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-07-28ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-07-28ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-07-28ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-07-28ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-07-28ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-07-28ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-07-28ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-07-28ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-07-28ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-07-28ubuntu
ubuntulinux-tools-realtime-hwe-22.04 (6.8.1-1056.57~22.04.2) @ jammy2026-07-28ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-07-28ubuntu

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.

Additional Vendor Advisories

(21)

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 17× in last 7d / 97× 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 105 total refreshes for this CVE.

  1. 2026-07-28 05:53 UTCVendor advisory
  2. 2026-07-28 05:53 UTCGHSA enrichment
  3. 2026-07-27 17:37 UTCEG score recompute
  4. 2026-07-27 17:37 UTCVendor advisory
  5. 2026-07-27 17:36 UTCGHSA enrichment
  6. 2026-07-27 03:50 UTCVendor advisory
  7. 2026-07-27 03:50 UTCGHSA enrichment
  8. 2026-07-26 15:30 UTCEG score recompute
  9. 2026-07-26 15:30 UTCVendor advisory
  10. 2026-07-26 15:29 UTCGHSA enrichment
  11. 2026-07-26 14:54 UTCEPSS rescore
  12. 2026-07-25 14:18 UTCEPSS rescore
  13. 2026-07-24 14:18 UTCEPSS rescore
  14. 2026-07-23 14:18 UTCEPSS rescore
  15. 2026-07-23 03:19 UTCEG score recompute
  16. 2026-07-22 14:08 UTCEPSS rescore
  17. 2026-07-21 15:25 UTCEPSS rescore
  18. 2026-07-20 17:08 UTCEPSS rescore
  19. 2026-07-19 14:31 UTCEPSS rescore
  20. 2026-07-19 14:31 UTCEPSS rescore
  21. 2026-07-19 02:29 UTCEPSS rescore
  22. 2026-07-18 10:04 UTCEPSS rescore
  23. 2026-07-17 00:47 UTCVendor advisory
  24. 2026-07-17 00:47 UTCGHSA enrichment
  25. 2026-07-16 17:03 UTCEPSS rescore
Show 75 more
  1. 2026-07-16 12:31 UTCVendor advisory
  2. 2026-07-16 12:31 UTCGHSA enrichment
  3. 2026-07-16 00:15 UTCVendor advisory
  4. 2026-07-16 00:15 UTCGHSA enrichment
  5. 2026-07-15 16:57 UTCEPSS rescore
  6. 2026-07-15 16:57 UTCEPSS rescore
  7. 2026-07-15 11:58 UTCVendor advisory
  8. 2026-07-15 11:58 UTCGHSA enrichment
  9. 2026-07-15 02:00 UTCEPSS rescore
  10. 2026-07-15 02:00 UTCEPSS rescore
  11. 2026-07-14 23:41 UTCVendor advisory
  12. 2026-07-14 23:41 UTCGHSA enrichment
  13. 2026-07-14 11:17 UTCVendor advisory
  14. 2026-07-14 11:17 UTCGHSA enrichment
  15. 2026-07-13 23:01 UTCGHSA enrichment
  16. 2026-07-13 22:31 UTCEPSS rescore
  17. 2026-07-13 10:45 UTCGHSA enrichment
  18. 2026-07-13 06:13 UTCEPSS rescore
  19. 2026-07-13 06:13 UTCEPSS rescore
  20. 2026-07-12 22:20 UTCVendor advisory
  21. 2026-07-12 22:20 UTCGHSA enrichment
  22. 2026-07-12 10:04 UTCVendor advisory
  23. 2026-07-12 10:04 UTCGHSA enrichment
  24. 2026-07-12 05:46 UTCEPSS rescore
  25. 2026-07-11 21:47 UTCVendor advisory
  26. 2026-07-11 21:46 UTCGHSA enrichment
  27. 2026-07-11 09:29 UTCVendor advisory
  28. 2026-07-11 09:29 UTCGHSA enrichment
  29. 2026-07-11 08:27 UTCEPSS rescore
  30. 2026-07-11 08:27 UTCEPSS rescore
  31. 2026-07-10 21:13 UTCVendor advisory
  32. 2026-07-10 21:13 UTCGHSA enrichment
  33. 2026-07-10 08:56 UTCVendor advisory
  34. 2026-07-10 08:56 UTCGHSA enrichment
  35. 2026-07-09 20:40 UTCGHSA enrichment
  36. 2026-07-09 19:10 UTCEPSS rescore
  37. 2026-07-09 19:10 UTCEPSS rescore
  38. 2026-07-09 08:23 UTCGHSA enrichment
  39. 2026-07-08 20:07 UTCGHSA enrichment
  40. 2026-07-08 15:16 UTCEPSS rescore
  41. 2026-07-08 15:16 UTCEPSS rescore
  42. 2026-07-08 07:50 UTCGHSA enrichment
  43. 2026-07-07 19:35 UTCGHSA enrichment
  44. 2026-07-07 13:46 UTCEPSS rescore
  45. 2026-07-07 13:46 UTCEPSS rescore
  46. 2026-07-07 06:53 UTCGHSA enrichment
  47. 2026-07-06 18:33 UTCGHSA enrichment
  48. 2026-07-06 16:27 UTCEPSS rescore
  49. 2026-07-06 16:27 UTCEPSS rescore
  50. 2026-07-06 06:16 UTCGHSA enrichment
  51. 2026-07-06 02:23 UTCEPSS rescore
  52. 2026-07-06 02:23 UTCEPSS rescore
  53. 2026-07-05 17:33 UTCGHSA enrichment
  54. 2026-07-05 05:16 UTCGHSA enrichment
  55. 2026-07-05 02:31 UTCEPSS rescore
  56. 2026-07-05 02:30 UTCEPSS rescore
  57. 2026-07-04 16:50 UTCGHSA enrichment
  58. 2026-07-04 06:31 UTCEPSS rescore
  59. 2026-07-04 04:32 UTCGHSA enrichment
  60. 2026-07-03 16:12 UTCGHSA enrichment
  61. 2026-07-03 03:56 UTCGHSA enrichment
  62. 2026-07-02 15:41 UTCGHSA enrichment
  63. 2026-07-02 03:25 UTCGHSA enrichment
  64. 2026-07-01 15:09 UTCGHSA enrichment
  65. 2026-07-01 15:07 UTCEPSS rescore
  66. 2026-07-01 02:54 UTCGHSA enrichment
  67. 2026-06-30 23:22 UTCEPSS rescore
  68. 2026-06-30 14:38 UTCEG score recompute▲ 8.80
  69. 2026-06-30 14:37 UTCGHSA enrichment
  70. 2026-06-29 14:06 UTCEPSS rescore
  71. 2026-06-29 14:06 UTCEPSS rescore
  72. 2026-06-28 14:07 UTCEPSS rescore
  73. 2026-06-28 07:52 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  74. 2026-06-28 04:56 UTCEPSS rescore
  75. 2026-06-28 04:56 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-53072?
CVE-2026-53072 is a high vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix locking in hciconnrequestevt() with HCIPROTO_DEFER When protocol sets HCIPROTODEFER, hciconnrequest_evt() calls hciconnectcfm(conn) without hdev->lock. Generally hciconnectcfm() assumes it is held, and if conn is…
When was CVE-2026-53072 disclosed?
CVE-2026-53072 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53072 actively exploited?
CVE-2026-53072 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 90.5% of all scored CVEs.
What is the CVSS score of CVE-2026-53072?
CVE-2026-53072 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-53072?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53072, 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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