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
Trending — 4 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_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(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 / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-09-18ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-09-18ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-09-18ubuntu
ubuntulinux-tools-lowlatency-hwe-22.04-edge (6.8.0-136.136.2~22.04.1) @ jammy2026-09-18ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-09-18ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-09-18ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-09-18ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-09-18ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-09-18ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-09-18ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-09-18ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-09-18ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-09-18ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-09-18ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-09-18ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-09-18ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-09-18ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-09-18ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-09-18ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1112.122~20.04.1) @ focal2026-09-18ubuntu
redhatkernel-0:5.14.0-687.44.1.el9_82026-09-04redhat
redhatkernel-0:6.12.0-211.51.1.el10_22026-09-04redhat

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

(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 13× in last 7d / 49× 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 198 total refreshes for this CVE.

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

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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-53073

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