CVE-2026-31511

Memory corruption via dangling MGMT command

Published Apr 22, 2026 · Updated Apr 22, 2026

Use-after-free in the Linux kernel Bluetooth MGMT subsystem allows local users with CAP_NET_ADMIN to corrupt kernel memory. In mgmt_add_adv_patterns_monitor_complete, an inverted status check can free a pending command without first unlinking it, so later pending-list traversal dereferences the freed object. Exploitation requires CAP_NET_ADMIN in the initial user namespace; the resulting kernel-memory access can compromise confidentiality, integrity, and availability.

CVSS severity7.8
High
EPSS probability0.13%
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 MGMT subsystem allows local users with CAP_NET_ADMIN to corrupt kernel memory. In mgmt_add_adv_patterns_monitor_complete, an inverted status check can free a pending command without first unlinking it, so later pending-list traversal dereferences the freed object. Exploitation requires CAP_NET_ADMIN in the initial user namespace; the resulting kernel-memory access can compromise confidentiality, integrity, and availability.

The record

CVE
CVE-2026-31511
Published
Apr 22, 2026
Updated
Apr 22, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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=302a1f674c00dd5581ab8e493ef44767c5101aab <3a89c33deffb3cb7877a7ea2e50734cd12b064f2
  2. Affected versionversion=302a1f674c00dd5581ab8e493ef44767c5101aab <5f5fa4cd35f707344f65ce9e225b6528691dbbaa
  3. Affected versionversion=302a1f674c00dd5581ab8e493ef44767c5101aab <bafec9325d4de26b6c49db75b5d5172de652aae0
  4. Affected versionversion=6.17
  5. Affected versionversion=87a1f16f07c6c43771754075e08f45b41d237421
  6. Affected versionversion=d71b98f253b079cbadc83266383f26fe7e9e103b <340666172cf747de58c283d2eef1f335f050538b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=302a1f674c00dd5581ab8e493ef44767c5101aab <3a89c33deffb3cb7877a7ea2e50734cd12b064f2; version=302a1f674c00dd5581ab8e493ef44767c5101aab <5f5fa4cd35f707344f65ce9e225b6528691dbbaa; version=302a1f674c00dd5581ab8e493ef44767c5101aab <bafec9325d4de26b6c49db75b5d5172de652aae0; version=6.17; version=87a1f16f07c6c43771754075e08f45b41d237421; version=d71b98f253b079cbadc83266383f26fe7e9e103b <340666172cf747de58c283d2eef1f335f050538b

Published CVSS scores

7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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