CVE-2026-80764

Kernel memory read via unlocked LE list reset

Published Sep 4, 2026 · Updated Sep 4, 2026

Use-after-free in the Linux kernel Bluetooth stack allows local users to read freed kernel memory through a debugfs reset race. The hci_cc_reset function clears LE accept and resolving lists without hdev->lock while debugfs readers traverse entries under that lock. Exploitation requires a concurrent list read and Bluetooth reset completion; the demonstrated consequence is a stale list-entry read.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Use-after-free in the Linux kernel Bluetooth stack allows local users to read freed kernel memory through a debugfs reset race. The hci_cc_reset function clears LE accept and resolving lists without hdev->lock while debugfs readers traverse entries under that lock. Exploitation requires a concurrent list read and Bluetooth reset completion; the demonstrated consequence is a stale list-entry read.

The record

CVE
CVE-2026-80764
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0de8cd646b0152c9ddd10257d8284938d0df0181
  2. Affected versionversion=3.18.3 <3.19
  3. Affected versionversion=3.19
  4. Affected versionversion=a4d5504d5c39cc84f1f828e19967595597a8136e <0628cc9b2fa29985a7b8c774741f8a736b0f5e7c
  5. Affected versionversion=a4d5504d5c39cc84f1f828e19967595597a8136e <25b05e3ce31d954540e99954bcc66cbceb27ab35
  6. Affected versionversion=a4d5504d5c39cc84f1f828e19967595597a8136e <33af47e847fe4a28b109673affb5874015d54f5a
  7. Affected versionversion=a4d5504d5c39cc84f1f828e19967595597a8136e <39a3afb91be3cb465f46ce7a8e5696d9e33edf93
  8. Affected versionversion=a4d5504d5c39cc84f1f828e19967595597a8136e <8e68c380290b1dd64a0a512ce66d0264130c46ed
  9. Affected versionversion=a4d5504d5c39cc84f1f828e19967595597a8136e <b55e83a4ba31d40deae22d4e4dc8c84083e953c6
  10. Affected versionversion=a4d5504d5c39cc84f1f828e19967595597a8136e <d57702d4c55633c243da5a2fec37ae2ad4adb621

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=0de8cd646b0152c9ddd10257d8284938d0df0181; version=3.18.3 <3.19; version=3.19; version=a4d5504d5c39cc84f1f828e19967595597a8136e <0628cc9b2fa29985a7b8c774741f8a736b0f5e7c; version=a4d5504d5c39cc84f1f828e19967595597a8136e <25b05e3ce31d954540e99954bcc66cbceb27ab35; version=a4d5504d5c39cc84f1f828e19967595597a8136e <33af47e847fe4a28b109673affb5874015d54f5a; version=a4d5504d5c39cc84f1f828e19967595597a8136e <39a3afb91be3cb465f46ce7a8e5696d9e33edf93; version=a4d5504d5c39cc84f1f828e19967595597a8136e <8e68c380290b1dd64a0a512ce66d0264130c46ed; version=a4d5504d5c39cc84f1f828e19967595597a8136e <b55e83a4ba31d40deae22d4e4dc8c84083e953c6; version=a4d5504d5c39cc84f1f828e19967595597a8136e <d57702d4c55633c243da5a2fec37ae2ad4adb621

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo