CVE-2026-53073

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-06-24. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
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_ldisc: Clear HCI_UART_PROTO_INIT on error

When hci_register_dev() fails in hci_uart_register_dev() HCI_UART_PROTO_INIT is not cleared before calling hu->proto->close(hu) and setting hu->hdev to NULL. This means incoming UART data will reach the protocol-specific recv handler in hci_uart_tty_receive() after resources are freed.

Clear HCI_UART_PROTO_INIT with a write lock before calling hu->proto->close() and setting hu->hdev to NULL. The write lock ensures all active readers have completed and no new reader can enter the protocol recv path before resources are freed.

This allows the protocol-specific recv functions to remove the "HCI_UART_REGISTERED" guard without risking a null pointer dereference if hci_register_dev() fails.

CVSS v3
5.5
EG Score
5.5(medium)
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

June 24, 2026

Last Modified

July 21, 2026

Advisory Details (8)

Auto-updated Jul 21, 2026
No patch confirmed yet.
generic

Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f4b69c35813c432973d340d3600c01de106ed474
generic

Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ed4033fb85ccaaf6c3983be3c7b037e48253d232
generic

Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ebb39b2d81731b83ee71a1ba6dd0291a57b5ac07
generic

Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a673cf6c4ac702cb79ac1f4d7fc4de763a6a3e40
generic

Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/68d39ea5e0adc9ecaea1ce8abd842ec972eb8718
generic

Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3daa5818e473ed60eb69d8b5c71b651909d28c5a
generic

Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/356dee1bcac4d0d9152390561fa63331ebff211b
generic

Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/194f029a4d7f739e44ebc1f473120187b4de5104

Vendor Advisories for CVE-2026-53073(3)

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 / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-08-30ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-08-30ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-30ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-30ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-08-30ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-08-30ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-08-30ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-30ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-08-30ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-08-30ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-08-30ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-08-30ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-08-30ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1063.71~22.04.1) @ jammy2026-08-30ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-30ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-30ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-30ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-08-30ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-30ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-08-30ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-08-30ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-30ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-08-30ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-08-30ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1107.113~20.04.1) @ focal2026-08-30ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-08-30ubuntu

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 rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (54 versions)5.10.259-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)6.1.176-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)6.1.176-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (140 versions)7.0.10-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(24)

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 5× in last 7d / 64× 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 185 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-53073?
CVE-2026-53073 is a medium vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hcildisc: Clear HCIUARTPROTOINIT on error When hciregisterdev() fails in hciuartregister_dev() HCIUARTPROTO_INIT is not cleared before calling hu->proto->close(hu) and setting hu->hdev to NULL. This means incoming UART…
When was CVE-2026-53073 disclosed?
CVE-2026-53073 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-2026-53073 actively exploited?
CVE-2026-53073 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-2026-53073?
CVE-2026-53073 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-53073?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53073, 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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