CVE-2026-64433

HIGHNVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-25. NVD baseline CVSS 7.8; 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
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: 0.2%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: MGMT: Fix UAF of hci_conn_params in add_device_complete

add_device_complete() runs from the hci_cmd_sync_work kworker, which holds only hci_req_sync_lock and *not* hci_dev_lock. It calls hci_conn_params_lookup() and then dereferences the returned object (params->flags) without taking hci_dev_lock:

params = hci_conn_params_lookup(hdev, &cp->addr.bdaddr, le_addr_type(cp->addr.type)); ... device_flags_changed(NULL, hdev, &cp->addr.bdaddr, cp->addr.type, hdev->conn_flags, params ? params->flags : 0);

hci_conn_params_lookup() walks hdev->le_conn_params and is documented to require hdev->lock. A concurrent MGMT_OP_REMOVE_DEVICE (remove_device()), which does run under hci_dev_lock, can call hci_conn_params_free() to list_del() and kfree() the very object the lookup returned, so the subsequent params->flags read touches freed memory [0].

Hold hci_dev_lock() across the hci_conn_params_lookup() and the read of params->flags (and the matching event emission) so the lookup result cannot be freed by a concurrent remove_device() before it is used, honouring the locking contract of hci_conn_params_lookup().

[0]: (trailing page/memory-state dump trimmed) BUG: KASAN: slab-use-after-free in add_device_complete+0x358/0x3d8 net/bluetooth/mgmt.c:7671 Read of size 1 at addr ffff000017ab26c1 by task kworker/u9:8/388

CPU: 1 UID: 0 PID: 388 Comm: kworker/u9:8 Not tainted 7.0.11 #20 PREEMPT Hardware name: linux,dummy-virt (DT) Workqueue: hci0 hci_cmd_sync_work Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xb4/0xd4 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x118/0x5d8 mm/kasan/report.c:482 kasan_report+0xb0/0xf4 mm/kasan/report.c:595 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378 add_device_complete+0x358/0x3d8 net/bluetooth/mgmt.c:7671 hci_cmd_sync_work+0x14c/0x240 net/bluetooth/hci_sync.c:334 process_one_work+0x628/0xd38 kernel/workqueue.c:3289 process_scheduled_works kernel/workqueue.c:3372 [inline] worker_thread+0x7a8/0xac0 kernel/workqueue.c:3453 kthread+0x39c/0x444 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860

Allocated by task 3401: kasan_save_stack+0x3c/0x64 mm/kasan/common.c:57 kasan_save_track+0x20/0x3c mm/kasan/common.c:78 kasan_save_alloc_info+0x40/0x54 mm/kasan/generic.c:570 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0xd4/0xd8 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x1b0/0x458 mm/slub.c:5385 kmalloc_noprof include/linux/slab.h:950 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] hci_conn_params_add+0x10c/0x4b0 net/bluetooth/hci_core.c:2279 hci_conn_params_set net/bluetooth/mgmt.c:5162 [inline] add_device+0x5b4/0xa54 net/bluetooth/mgmt.c:7755 hci_mgmt_cmd net/bluetooth/hci_sock.c:1721 [inline] hci_sock_sendmsg+0x10b4/0x1dd0 net/bluetooth/hci_sock.c:1841 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0xe0/0x128 net/socket.c:742 sock_write_iter+0x250/0x390 net/socket.c:1195 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x66c/0xab0 fs/read_write.c:688 ksys_write+0x1fc/0x24c fs/read_write.c:740 __do_sys_write fs/read_write.c:751 [inline] __se_sys_write fs/read_write.c:748 [inline] __arm64_sys_write+0x70/0xa4 fs/read_write.c:748 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x84/0x2a8 arch/arm64/kernel/syscall.c:49 el0_svc_common.constprop.0+0xe4/0x294 arch/arm64/kernel/syscall.c:132 do_el0_svc+0x44/0x5c arch/arm64/kernel/syscall.c:151 el0_svc+0x38/0xac arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

Freed by task 3740: kasan_save_stack+0x3c/0x64 ---truncated---

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 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 (value × EchelonGraph’s weight)
Severity78% × 45%
The EG Score, 7.8 of 10.
Exploitation0.2% × 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
5th
KEV
Not listed

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

July 25, 2026

Last Modified

September 3, 2026

Advisory Details (5)

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

Bluetooth: MGMT: Fix UAF of hci_conn_params in add_device_complete - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fa85d985f614bc3feb343000f14a1072e99b0df1
Web page

Bluetooth: MGMT: Fix UAF of hci_conn_params in add_device_complete - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e4369e4e970f3fa4676b76be14c1d315c87f22b6
Web page

Bluetooth: MGMT: Fix UAF of hci_conn_params in add_device_complete - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/caed4a96d55757c139a899744657c032b6186665
Web page

Bluetooth: MGMT: Fix UAF of hci_conn_params in add_device_complete - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b346efa825b5e4386f19bc63f81141652d496ec4
Web page

Bluetooth: MGMT: Fix UAF of hci_conn_params in add_device_complete - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9531014c60c804e16099885d4a98aedcf31bce8d

Vendor Advisories for CVE-2026-64433(2)

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

Patch Availability(11)

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux-6.12—
  • every version up to 6.12.100-1~deb12u1: fixed in 6.12.100-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.95-1~bpo12+1 (30 versions)
  • every version up to 6.12.96-1: fixed in 6.12.96-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (159 versions)
  • every version up to 7.1.4-1: fixed in 7.1.4-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(11)

Data Freshness Timeline

(refreshed 14× in last 7d / 79× 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 195 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 95 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  3. 2026-10-13 11:41 UTCEG score recompute
  4. 2026-10-13 11:41 UTCVendor advisory
  5. 2026-10-13 11:41 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  6. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  7. 2026-10-12 15:48 UTCEG score recompute
  8. 2026-10-11 19:32 UTCEG score recompute
  9. 2026-10-11 16:47 UTCEG score recompute
  10. 2026-10-11 14:09 UTCEG score recompute
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  13. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-10-07 04:26 UTCEG score recompute
  16. 2026-10-07 04:26 UTCVendor advisory
  17. 2026-10-07 04:26 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  18. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  21. 2026-10-04 07:29 UTCEG score recompute
  22. 2026-10-04 07:29 UTCVendor advisory
  23. 2026-10-04 07:29 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  24. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  25. 2026-10-02 18:33 UTCEG score recompute
Show 75 more
  1. 2026-10-02 18:33 UTCVendor advisory
  2. 2026-10-02 18:33 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  3. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  4. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  5. 2026-10-01 15:45 UTCVendor advisory
  6. 2026-10-01 15:45 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  7. 2026-10-01 04:02 UTCEG score recompute
  8. 2026-10-01 04:02 UTCVendor advisory
  9. 2026-10-01 04:02 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  10. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-09-29 08:01 UTCEG score recompute
  12. 2026-09-29 08:01 UTCVendor advisory
  13. 2026-09-29 08:00 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  14. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-09-28 04:09 UTCEG score recompute
  16. 2026-09-28 04:09 UTCVendor advisory
  17. 2026-09-28 04:09 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  18. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-09-25 07:40 UTCEG score recompute
  20. 2026-09-25 07:40 UTCVendor advisory
  21. 2026-09-25 07:40 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  22. 2026-09-24 09:46 UTCVendor advisory
  23. 2026-09-24 09:45 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  24. 2026-09-23 22:08 UTCEG score recompute
  25. 2026-09-23 22:08 UTCVendor advisory
  26. 2026-09-23 22:07 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  27. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  28. 2026-09-23 09:36 UTCVendor advisory
  29. 2026-09-23 09:35 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  30. 2026-09-22 21:58 UTCEG score recompute
  31. 2026-09-22 21:58 UTCVendor advisory
  32. 2026-09-22 21:58 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  33. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  34. 2026-09-20 01:21 UTCEG score recompute
  35. 2026-09-20 01:21 UTCVendor advisory
  36. 2026-09-20 01:21 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  37. 2026-09-18 19:38 UTCEG score recompute
  38. 2026-09-18 19:38 UTCVendor advisory
  39. 2026-09-18 19:38 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  40. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  41. 2026-09-18 02:43 UTCEG score recompute
  42. 2026-09-18 02:43 UTCVendor advisory
  43. 2026-09-18 02:43 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  44. 2026-09-17 01:52 UTCEG score recompute
  45. 2026-09-17 01:52 UTCVendor advisory
  46. 2026-09-17 01:52 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  47. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  48. 2026-09-16 06:25 UTCEG score recompute
  49. 2026-09-16 06:25 UTCVendor advisory
  50. 2026-09-16 06:25 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  51. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  52. 2026-09-15 09:21 UTCEG score recompute
  53. 2026-09-15 09:21 UTCVendor advisory
  54. 2026-09-15 09:21 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  55. 2026-09-14 15:52 UTCVendor advisory
  56. 2026-09-14 15:52 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  57. 2026-09-14 03:00 UTCEG score recompute
  58. 2026-09-14 03:00 UTCVendor advisory
  59. 2026-09-14 03:00 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  60. 2026-09-13 15:22 UTCVendor advisory
  61. 2026-09-13 15:22 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  62. 2026-09-13 03:12 UTCVendor advisory
  63. 2026-09-13 03:12 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  64. 2026-09-12 15:35 UTCEG score recompute
  65. 2026-09-12 15:35 UTCVendor advisory
  66. 2026-09-12 15:35 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  67. 2026-09-12 03:58 UTCVendor advisory
  68. 2026-09-12 03:58 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  69. 2026-09-11 16:20 UTCEG score recompute
  70. 2026-09-11 16:20 UTCVendor advisory
  71. 2026-09-11 16:20 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8
  72. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  73. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  74. 2026-09-10 22:06 UTCVendor advisory
  75. 2026-09-10 22:06 UTCGHSA enrichmentGHSA-g2v2-wh7x-5cmc · GitHub severity HIGH · GitHub CVSS 7.8

Frequently asked(5)

What is CVE-2026-64433?
CVE-2026-64433 is a high-severity vulnerability; its CVE record was published on July 25, 2026. In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: Fix UAF of hciconnparams in adddevicecomplete adddevicecomplete() runs from the hcicmdsync_work kworker, which holds only hcireqsynclock and *not* hcidev_lock. It calls hciconnparams_lookup() and then dereferences…
When was the CVE record for CVE-2026-64433 published?
The CVE record for CVE-2026-64433 was published on July 25, 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 September 3, 2026; the record at its source may have been updated since.
Is CVE-2026-64433 actively exploited?
CVE-2026-64433 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-64433?
CVE-2026-64433 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-64433?
A fix for CVE-2026-64433 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-64433 are linked in the Vendor Advisories panel on this page.

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