CVE-2026-53072

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. the CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.8Exploit: None knownExposed services: Not assessed

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
8.8HIGHmedium confidence
EG Risk
44
EG Risk 44/100

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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
EPSS PROB
0.2%
EPSS %ILE
8th
KEV
Not listed

Published

June 24, 2026

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Jun 28, 2026
Patch available.
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(4)

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

Patch Availability(30)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-09-23ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-09-23ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-09-23ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-09-23ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-09-23ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-09-23ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-09-23ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-09-23ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-09-23ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-09-23ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-09-23ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-09-23ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-09-23ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-09-23ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-09-23ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-09-23ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-09-23ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1112.122~20.04.1) @ focal2026-09-23ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-23ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-09-23ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-09-23ubuntu
ubuntulinux-tools-realtime-hwe-22.04 (6.8.1-1056.57~22.04.2) @ jammy2026-09-23ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-09-23ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-09-23ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-09-23ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-09-23ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-09-23ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1106.104) @ jammy2026-09-23ubuntu
redhatkernel-0:5.14.0-687.47.1.el9_82026-09-14redhat
redhatkernel-0:6.12.0-211.53.1.el10_22026-09-08redhat

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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (54 versions)
  • every version up to 5.10.259-1: fixed in 5.10.259-1
—
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)
  • every version up to 6.1.176-1~deb11u1: fixed in 6.1.176-1~deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)
  • every version up to 6.1.176-1: fixed in 6.1.176-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)
  • every version up to 6.12.94-1: fixed in 6.12.94-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (141 versions)
  • every version up to 7.0.10-1: fixed in 7.0.10-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(22)

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 7× in last 7d / 37× 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 312 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 on June 24, 2026, with the most recent update on August 5, 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 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53072?
CVE-2026-53072 has a CVSS base score of 8.8 (the CNA's own assessment, by linux; NVD's own analysis pending).
How do I remediate CVE-2026-53072?
A fix for CVE-2026-53072 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-53072 are linked in the Vendor Advisories panel on this page.

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