CVE-2026-43322

HIGHNVD 8.88.8
EchelonGraph scoreMEDIUM confidence

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

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-08. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week

Also known asEUVD-2026-28606 (ENISA EUVD) · GHSA-8q8r-pqgc-3hjc (GitHub Security Advisories)Source: ENISA EUVD

8.8EG
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: 0.2%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: hci_sync: Fix UAF in le_read_features_complete

This fixes the following backtrace caused by hci_conn being freed before le_read_features_complete but after hci_le_read_remote_features_sync so hci_conn_del -> hci_cmd_sync_dequeue is not able to prevent it:

================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1383 [inline] BUG: KASAN: slab-use-after-free in hci_conn_drop include/net/bluetooth/hci_core.h:1688 [inline] BUG: KASAN: slab-use-after-free in le_read_features_complete+0x5b/0x340 net/bluetooth/hci_sync.c:7344 Write of size 4 at addr ffff8880796b0010 by task kworker/u9:0/52

CPU: 0 UID: 0 PID: 52 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: hci0 hci_cmd_sync_work Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xcd/0x630 mm/kasan/report.c:482 kasan_report+0xe0/0x110 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:194 [inline] kasan_check_range+0x100/0x1b0 mm/kasan/generic.c:200 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1383 [inline] hci_conn_drop include/net/bluetooth/hci_core.h:1688 [inline] le_read_features_complete+0x5b/0x340 net/bluetooth/hci_sync.c:7344 hci_cmd_sync_work+0x1ff/0x430 net/bluetooth/hci_sync.c:334 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246

Allocated by task 5932: kasan_save_stack+0x33/0x60 mm/kasan/common.c:56 kasan_save_track+0x14/0x30 mm/kasan/common.c:77 poison_kmalloc_redzone mm/kasan/common.c:400 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:417 kmalloc_noprof include/linux/slab.h:957 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] __hci_conn_add+0xf8/0x1c70 net/bluetooth/hci_conn.c:963 hci_conn_add_unset+0x76/0x100 net/bluetooth/hci_conn.c:1084 le_conn_complete_evt+0x639/0x1f20 net/bluetooth/hci_event.c:5714 hci_le_enh_conn_complete_evt+0x23d/0x380 net/bluetooth/hci_event.c:5861 hci_le_meta_evt+0x357/0x5e0 net/bluetooth/hci_event.c:7408 hci_event_func net/bluetooth/hci_event.c:7716 [inline] hci_event_packet+0x685/0x11c0 net/bluetooth/hci_event.c:7773 hci_rx_work+0x2c9/0xeb0 net/bluetooth/hci_core.c:4076 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246

Freed by task 5932: kasan_save_stack+0x33/0x60 mm/kasan/common.c:56 kasan_save_track+0x14/0x30 mm/kasan/common.c:77 __kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2540 [inline] slab_free mm/slub.c:6663 [inline] kfree+0x2f8/0x6e0 mm/slub.c:6871 device_release+0xa4/0x240 drivers/base/core.c:2565 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1e7/0x590 lib/kobject. ---truncated---

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100

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)
Severity88% × 45%
Impact severity (EG Severity): CVSS 8.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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
0.2%
EPSS %ILE
12th
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 (8.8): severity, escalated by confirmed exploitation. This CVE's 8.8 is its impact severity (EG Severity), not escalated.

EG Severity
8.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% 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 (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” 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 8, 2026

Last Modified

August 5, 2026

Advisory Details (2)

Auto-updated May 11, 2026
Patch available.
Web page

Bluetooth: hci_sync: Fix UAF in le_read_features_complete - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/260dc2be643b4a35b27008490c533613e3e53867
Web page

Bluetooth: hci_sync: Fix UAF in le_read_features_complete - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/035c25007c9e698bef3826070ee34bb6d778020c

Vendor Advisories for CVE-2026-43322(2)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatkernel-0:6.12.0-211.20.1.el10_22026-06-04redhat
linuxKernel @ 6.19.12 (fixes >=6.19.0)—osv

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

(1 across 1 ecosystem)
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(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 40× 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 287 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 187 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  2. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  3. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  4. 2026-10-25 14:28 UTCEG score recompute
  5. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  6. 2026-10-23 23:57 UTCEG score recompute
  7. 2026-10-23 23:57 UTCVendor advisory
  8. 2026-10-23 23:57 UTCGHSA enrichmentGHSA-8q8r-pqgc-3hjc · GitHub severity HIGH · GitHub CVSS 8.8
  9. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  10. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  11. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  12. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  13. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  14. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  15. 2026-10-18 03:40 UTCEG score recompute
  16. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  17. 2026-10-17 14:13 UTCEG score recompute
  18. 2026-10-17 14:13 UTCVendor advisory
  19. 2026-10-17 14:13 UTCGHSA enrichmentGHSA-8q8r-pqgc-3hjc · GitHub severity HIGH · GitHub CVSS 8.8
  20. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  21. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  22. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  23. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  24. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  25. 2026-10-12 16:06 UTCEG score recompute
Show 75 more
  1. 2026-10-11 19:48 UTCEG score recompute
  2. 2026-10-11 17:02 UTCEG score recompute
  3. 2026-10-11 14:28 UTCEG score recompute
  4. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  7. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  9. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  12. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  13. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  14. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  15. 2026-09-30 08:28 UTCOSV refresh
  16. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  17. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  18. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  19. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  20. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  21. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  22. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  23. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  24. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  25. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  26. 2026-09-11 14:53 UTCOSV refresh
  27. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  28. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  29. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  30. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  31. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  32. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  33. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  34. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  35. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  36. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  37. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  38. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  39. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  40. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  41. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  42. 2026-08-23 19:16 UTCEG score recompute
  43. 2026-08-23 19:16 UTCVendor advisory
  44. 2026-08-23 19:16 UTCGHSA enrichmentGHSA-8q8r-pqgc-3hjc · GitHub severity HIGH · GitHub CVSS 8.8
  45. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  46. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  47. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  48. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  49. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  50. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  51. 2026-08-17 11:56 UTCEG score recompute
  52. 2026-08-17 11:56 UTCVendor advisory
  53. 2026-08-17 11:56 UTCGHSA enrichmentGHSA-8q8r-pqgc-3hjc · GitHub severity HIGH · GitHub CVSS 8.8
  54. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  55. 2026-08-16 04:38 UTCEG score recompute
  56. 2026-08-16 04:38 UTCVendor advisory
  57. 2026-08-16 04:38 UTCGHSA enrichmentGHSA-8q8r-pqgc-3hjc · GitHub severity HIGH · GitHub CVSS 8.8
  58. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  59. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  60. 2026-08-14 16:08 UTCVendor advisory
  61. 2026-08-14 16:08 UTCGHSA enrichmentGHSA-8q8r-pqgc-3hjc · GitHub severity HIGH · GitHub CVSS 8.8
  62. 2026-08-14 03:11 UTCEG score recompute
  63. 2026-08-14 03:11 UTCVendor advisory
  64. 2026-08-14 03:11 UTCGHSA enrichmentGHSA-8q8r-pqgc-3hjc · GitHub severity HIGH · GitHub CVSS 8.8
  65. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  66. 2026-08-13 06:00 UTCVendor advisory
  67. 2026-08-13 06:00 UTCGHSA enrichmentGHSA-8q8r-pqgc-3hjc · GitHub severity HIGH · GitHub CVSS 8.8
  68. 2026-08-12 16:49 UTCEG score recompute
  69. 2026-08-12 16:49 UTCVendor advisory
  70. 2026-08-12 16:49 UTCGHSA enrichmentGHSA-8q8r-pqgc-3hjc · GitHub severity HIGH · GitHub CVSS 8.8
  71. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  72. 2026-08-11 15:53 UTCEG score recompute
  73. 2026-08-11 15:53 UTCVendor advisory
  74. 2026-08-11 15:53 UTCGHSA enrichmentGHSA-8q8r-pqgc-3hjc · GitHub severity HIGH · GitHub CVSS 8.8
  75. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.2% · 12th percentile

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Frequently asked(5)

What is CVE-2026-43322?
CVE-2026-43322 is a high-severity vulnerability; its CVE record was published on May 8, 2026. In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hcisync: Fix UAF in lereadfeaturescomplete This fixes the following backtrace caused by hci_conn being freed before lereadfeatures_complete but after hcilereadremotefeaturessync so hciconndel -> hcicmdsyncdequeue is not…
When was the CVE record for CVE-2026-43322 published?
The CVE record for CVE-2026-43322 was published on May 8, 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 August 5, 2026; the record at its source may have been updated since.
Is CVE-2026-43322 actively exploited?
CVE-2026-43322 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (12th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-43322?
CVE-2026-43322 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-43322?
A fix for CVE-2026-43322 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-43322 are linked in the Vendor Advisories panel on this page.

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