CVE-2026-43019

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-01. A secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync

hci_conn lookup and field access must be covered by hdev lock in set_cig_params_sync, otherwise it's possible it is freed concurrently.

Take hdev lock to prevent hci_conn from being deleted or modified concurrently. Just RCU lock is not suitable here, as we also want to avoid "tearing" in the configuration.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 1, 2026

Last Modified

October 19, 2026

Advisory Details (4)

Auto-updated May 3, 2026
Patch available.
Web page

Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bad65b4b0a96139f023eadc28a33125963208449
Web page

Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a2639a7f0f5bf7d73f337f8f077c19415c62ed2c
Web page

Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7d568fede8eac91161a60b710aa920abe9b0fb9f
Web page

Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/66d432e9b45bae7881ffcdb12cd8fd0bf254ef02

Vendor Advisories for CVE-2026-43019(2)

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

Patch Availability(16)

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 rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)
  • every version up to 6.12.85-1: fixed in 6.12.85-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (126 versions)
  • every version up to 6.19.12-1: fixed in 6.19.12-1
—

Weakness Classification(2)

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

All Vendor Advisories

(15)

Data Freshness Timeline

(refreshed 19× in last 7d / 41× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 261 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 161 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-10-19 20:32 UTCEG score recompute
  3. 2026-10-19 20:32 UTCVendor advisory
  4. 2026-10-19 20:31 UTCGHSA enrichmentGHSA-2qwp-9c8h-mrvc · GitHub severity HIGH · GitHub CVSS 7.8
  5. 2026-10-19 19:27 UTCEG score recompute
  6. 2026-10-19 19:27 UTCVendor advisory
  7. 2026-10-19 19:26 UTCGHSA enrichmentGHSA-2qwp-9c8h-mrvc · GitHub severity HIGH · GitHub CVSS 7.8
  8. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  9. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  10. 2026-10-18 03:40 UTCEG score recompute
  11. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  12. 2026-10-16 17:01 UTCEG score recompute
  13. 2026-10-16 17:01 UTCVendor advisory
  14. 2026-10-16 17:00 UTCGHSA enrichmentGHSA-2qwp-9c8h-mrvc · GitHub severity HIGH · GitHub CVSS 7.8
  15. 2026-10-16 15:34 UTCEG score recompute
  16. 2026-10-16 15:34 UTCVendor advisory
  17. 2026-10-16 15:34 UTCGHSA enrichmentGHSA-2qwp-9c8h-mrvc · GitHub severity HIGH · GitHub CVSS 7.8
  18. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  19. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  20. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  21. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  22. 2026-10-12 16:06 UTCEG score recompute
  23. 2026-10-11 19:48 UTCEG score recompute
  24. 2026-10-11 17:03 UTCEG score recompute
  25. 2026-10-11 14:28 UTCEG score recompute
Show 75 more
  1. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  3. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  4. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  5. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  6. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  7. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  8. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  9. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  10. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  11. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  12. 2026-09-30 11:47 UTCOSV refresh
  13. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  14. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  15. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  20. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  22. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-09-11 18:40 UTCOSV refresh
  24. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  26. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  27. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  28. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  29. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  30. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  31. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  32. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  33. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  34. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  35. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  36. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  37. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  38. 2026-08-23 21:52 UTCEG score recompute
  39. 2026-08-23 21:52 UTCVendor advisory
  40. 2026-08-23 21:52 UTCGHSA enrichmentGHSA-2qwp-9c8h-mrvc · GitHub severity HIGH · GitHub CVSS 7.8
  41. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  42. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  43. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  44. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  45. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  46. 2026-08-17 13:21 UTCEG score recompute
  47. 2026-08-17 13:21 UTCVendor advisory
  48. 2026-08-17 13:21 UTCGHSA enrichmentGHSA-2qwp-9c8h-mrvc · GitHub severity HIGH · GitHub CVSS 7.8
  49. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  50. 2026-08-16 05:16 UTCEG score recompute
  51. 2026-08-16 05:16 UTCVendor advisory
  52. 2026-08-16 05:16 UTCGHSA enrichmentGHSA-2qwp-9c8h-mrvc · GitHub severity HIGH · GitHub CVSS 7.8
  53. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  54. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  55. 2026-08-15 01:29 UTCVendor advisory
  56. 2026-08-15 01:29 UTCGHSA enrichmentGHSA-2qwp-9c8h-mrvc · GitHub severity HIGH · GitHub CVSS 7.8
  57. 2026-08-14 14:37 UTCVendor advisory
  58. 2026-08-14 14:37 UTCGHSA enrichmentGHSA-2qwp-9c8h-mrvc · GitHub severity HIGH · GitHub CVSS 7.8
  59. 2026-08-14 03:45 UTCEG score recompute
  60. 2026-08-14 03:45 UTCVendor advisory
  61. 2026-08-14 03:45 UTCGHSA enrichmentGHSA-2qwp-9c8h-mrvc · GitHub severity HIGH · GitHub CVSS 7.8
  62. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  63. 2026-08-13 04:16 UTCVendor advisory
  64. 2026-08-13 04:16 UTCGHSA enrichmentGHSA-2qwp-9c8h-mrvc · GitHub severity HIGH · GitHub CVSS 7.8
  65. 2026-08-12 17:24 UTCEG score recompute
  66. 2026-08-12 17:23 UTCVendor advisory
  67. 2026-08-12 17:23 UTCGHSA enrichmentGHSA-2qwp-9c8h-mrvc · GitHub severity HIGH · GitHub CVSS 7.8
  68. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  69. 2026-08-11 16:20 UTCEG score recompute
  70. 2026-08-11 16:20 UTCVendor advisory
  71. 2026-08-11 16:20 UTCGHSA enrichmentGHSA-2qwp-9c8h-mrvc · GitHub severity HIGH · GitHub CVSS 7.8
  72. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  73. 2026-08-11 01:47 UTCEG score recompute
  74. 2026-08-11 01:47 UTCVendor advisory
  75. 2026-08-11 01:47 UTCGHSA enrichmentGHSA-2qwp-9c8h-mrvc · GitHub severity HIGH · GitHub CVSS 7.8

Frequently asked(5)

What is CVE-2026-43019?
CVE-2026-43019 is a high-severity vulnerability; its CVE record was published on May 1, 2026. In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hciconn: fix potential UAF in setcigparamssync hci_conn lookup and field access must be covered by hdev lock in setcigparams_sync, otherwise it's possible it is freed concurrently. Take hdev lock to prevent hci_conn from…
When was the CVE record for CVE-2026-43019 published?
The CVE record for CVE-2026-43019 was published on May 1, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 19, 2026; the record at its source may have been updated since.
Is CVE-2026-43019 actively exploited?
CVE-2026-43019 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-43019?
CVE-2026-43019 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-43019?
A fix for CVE-2026-43019 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-43019 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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