CVE-2026-46138

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-05-28. the CNA's CVSS baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: None knownExposed: 0

A fix is available — apply it.

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

Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt

hci_le_create_big_complete_evt() iterates over BT_BOUND connections for a BIG handle using a while loop, accessing ev->bis_handle[i++] on each iteration. However, there is no check that i stays within ev->num_bis before the array access.

When a controller sends a LE_Create_BIG_Complete event with fewer bis_handle entries than there are BT_BOUND connections for that BIG, or with num_bis=0, the loop reads beyond the valid bis_handle[] flex array into adjacent heap memory. Since the out-of-bounds values typically exceed HCI_CONN_HANDLE_MAX (0x0EFF), hci_conn_set_handle() rejects them and the connection remains in BT_BOUND state. The same connection is then found again by hci_conn_hash_lookup_big_state(), creating an infinite loop with hci_dev_lock held.

Fix this by terminating the BIG if in case not all BIS could be setup properly.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity81% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

May 28, 2026

Last Modified

August 5, 2026

Advisory Details (5)

Auto-updated Jun 3, 2026
No patch confirmed yet.
generic

Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/77981a507aa0fc001dc37f0dd6631dd2042fed17
generic

Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6cb7f67bc28da787499291a562d49a084d9c90cd
generic

Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/665da0baaf0396f9ed3c86ccb3955dcd0b73e774
generic

Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5ddb8014261137cadaf83ab5617a588d80a22586
generic

Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/22559ad7654f61727fc270ee4893da9f4b70cf17

Vendor Advisories for CVE-2026-46138(2)

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

Patch Availability(22)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-08-25ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-08-25ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-08-25ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-08-25ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-25ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-ibm-edge (6.8.0-1061.62~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-08-25ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-25ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.8.0-1059.62~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-08-25ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-25ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-25ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-25ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-08-25ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-25ubuntu

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

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.88-1~bpo12+1 (21 versions)6.12.88-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.7-1~bpo13+1 (133 versions)7.0.7-1—

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 5× in last 7d / 87× 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 286 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-46138?
CVE-2026-46138 is a high vulnerability published on May 28, 2026. In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hcievent: Fix OOB read and infinite loop in hcilecreatebigcompleteevt hcilecreatebigcompleteevt() iterates over BTBOUND connections for a BIG handle using a while loop, accessing ev->bis_handle[i++] on each iteration.…
When was CVE-2026-46138 disclosed?
CVE-2026-46138 was first published in the National Vulnerability Database on May 28, 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-2026-46138 actively exploited?
CVE-2026-46138 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 80.2% of all scored CVEs.
What is the CVSS score of CVE-2026-46138?
CVE-2026-46138 has a CVSS v4.0 base score of 8.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-46138?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46138, 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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