CVE-2025-71082

Local kernel memory corruption via btusb use-after-free

Published Jan 13, 2026 · Updated Jan 13, 2026

Use-after-free in the Linux Kernel btusb driver allows local users to corrupt kernel memory during Bluetooth USB interface teardown. btusb_probe ties shared driver data to the primary interface with devm_kzalloc, so btusb_disconnect frees it while ISOC or DIAG interfaces still retain references. Triggering the stale access requires a btusb device with one of those additional interfaces and release of the primary interface before the others.

CVSS severity7.8
High
EPSS probability0.14%
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 btusb driver allows local users to corrupt kernel memory during Bluetooth USB interface teardown. btusb_probe ties shared driver data to the primary interface with devm_kzalloc, so btusb_disconnect frees it while ISOC or DIAG interfaces still retain references. Triggering the stale access requires a btusb device with one of those additional interfaces and release of the primary interface before the others.

The record

CVE
CVE-2025-71082
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 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=3.7
  2. Affected versionversion=98921dbd00c4e2e4bdd56423cb5edf98d57b45f7 <1e54c19eaf84ba652c4e376571093e58e144b339
  3. Affected versionversion=98921dbd00c4e2e4bdd56423cb5edf98d57b45f7 <252714f1e8bdd542025b16321c790458014d6880
  4. Affected versionversion=98921dbd00c4e2e4bdd56423cb5edf98d57b45f7 <c0ecb3e4451fe94f4315e6d09c4046dfbc42090b
  5. Affected versionversion=98921dbd00c4e2e4bdd56423cb5edf98d57b45f7 <cca0e9206e3bcc63cd3e72193e60149165d493cc
  6. Affected versionversion=98921dbd00c4e2e4bdd56423cb5edf98d57b45f7 <fdf7c640fb8a44a59b0671143d8c2f738bc48003

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.7; version=98921dbd00c4e2e4bdd56423cb5edf98d57b45f7 <1e54c19eaf84ba652c4e376571093e58e144b339; version=98921dbd00c4e2e4bdd56423cb5edf98d57b45f7 <252714f1e8bdd542025b16321c790458014d6880; version=98921dbd00c4e2e4bdd56423cb5edf98d57b45f7 <c0ecb3e4451fe94f4315e6d09c4046dfbc42090b; version=98921dbd00c4e2e4bdd56423cb5edf98d57b45f7 <cca0e9206e3bcc63cd3e72193e60149165d493cc; version=98921dbd00c4e2e4bdd56423cb5edf98d57b45f7 <fdf7c640fb8a44a59b0671143d8c2f738bc48003

Published CVSS scores

7.8kernel.orgCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
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