CVE-2026-64406

HIGHPre-NVD 8.08.0—
EchelonGraph scoreMEDIUM confidence

Score 8.0 from GitHub Security Advisory (severity: HIGH) published 2026-07-25. a secondary CVSS source baseline 8.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.0Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

Bluetooth: fix UAF in bt_accept_dequeue()

bt_accept_get() takes a temporary reference before dropping the accept queue lock. bt_accept_dequeue() currently drops that reference before bt_accept_unlink(), leaving only the queue reference.

bt_accept_unlink() drops the queue reference. The subsequent sock_hold() therefore accesses freed memory if it was the final reference, as observed by KASAN during listening L2CAP socket cleanup.

Retain the temporary queue-walk reference through unlink and hand it to the caller on success. Drop it explicitly on the closed and not-yet-connected paths.

CVSS v3
8.0
EG Score
8.0(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
Severity80% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

July 25, 2026

Last Modified

August 17, 2026

Advisory Details (8)

Auto-updated Jul 27, 2026
No patch confirmed yet.
generic

Bluetooth: fix UAF in bt_accept_dequeue() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c66a95e60b65d876a927123b0ed36bd6177d9ca6
generic

Bluetooth: fix UAF in bt_accept_dequeue() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c0577c55219be42b6ea2ea8db11e85bfab6f4e8d
generic

Bluetooth: fix UAF in bt_accept_dequeue() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/96ad400d5132eb333f28f6f1e2d58f0728ca9547
generic

Bluetooth: fix UAF in bt_accept_dequeue() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6303ed4bbe0095f4cc195225479bf506e010d1db
generic

Bluetooth: fix UAF in bt_accept_dequeue() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/50c662bdcd51b03033a0abed6716bfd377ba1049
generic

Bluetooth: fix UAF in bt_accept_dequeue() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4bd0b274054f2679f28b70222b607bb0afc3ab9a
generic

Bluetooth: fix UAF in bt_accept_dequeue() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/26168db1ce5a9766cde021b18e590a101c056614
generic

Bluetooth: fix UAF in bt_accept_dequeue() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0a98ff4e7b867f72fbb4e1237d81e9fa02ded0a0

Vendor Advisories for CVE-2026-64406(2)

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

Affected Packages

(6 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (55 versions)5.10.262-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.177-1~deb11u1 (22 versions)6.1.180-1~deb11u1—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (55 versions)6.1.180-1—
linux-6.12—6.12.100-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.95-1~bpo12+1 (30 versions)6.12.96-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (156 versions)7.1.4-1—

Data Freshness Timeline

(refreshed 33× in last 7d / 148× 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 178 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64406?
CVE-2026-64406 is a high vulnerability published on July 25, 2026. In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix UAF in btacceptdequeue() btacceptget() takes a temporary reference before dropping the accept queue lock. btacceptdequeue() currently drops that reference before btacceptunlink(), leaving only the queue reference.…
When was CVE-2026-64406 disclosed?
CVE-2026-64406 was first published in the National Vulnerability Database on July 25, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64406 actively exploited?
CVE-2026-64406 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 80.6% of all scored CVEs.
What is the CVSS score of CVE-2026-64406?
CVE-2026-64406 has a CVSS v3 base score of 8.0 (NVD).
How do I remediate CVE-2026-64406?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64406, 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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