CVE-2025-37918

Local kernel crash via mishandled firmware dump packet

Published May 20, 2025 · Updated Aug 5, 2026

NULL pointer dereference in Linux kernel Bluetooth btusb allows local users to crash affected systems via a QCA firmware dump. handle_dump_pkt_qca() forwards hci_devcd_init()'s zero success result, so callers misclassify a consumed dump packet, pass it to hci_recv_frame(), and free its skb before hci_devcd_rx() dequeues it. Triggering the path requires local low-privileged access, a WCN7851 device identified as 0489:e0f3, and processing of its firmware crash dump; the bounded result is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux kernel Bluetooth btusb allows local users to crash affected systems via a QCA firmware dump. handle_dump_pkt_qca() forwards hci_devcd_init()'s zero success result, so callers misclassify a consumed dump packet, pass it to hci_recv_frame(), and free its skb before hci_devcd_rx() dequeues it. Triggering the path requires local low-privileged access, a WCN7851 device identified as 0489:e0f3, and processing of its firmware crash dump; the bounded result is a kernel crash.

The record

CVE
CVE-2025-37918
Published
May 20, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6 <0317b033abcd1d8dd2798f0e2de5e84543d0bd22
  2. Affected versionversion=20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6 <2e8d44ebaa7babdd5c5ab50ca275826e241920d6
  3. Affected versionversion=20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6 <8563d9fabd8a4b726ba7acab4737c438bf11a059
  4. Affected versionversion=20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6 <b70b41591ec48c78ec6a885e1f57bfc4029e5e13
  5. Affected versionversion=6.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6 <0317b033abcd1d8dd2798f0e2de5e84543d0bd22; version=20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6 <2e8d44ebaa7babdd5c5ab50ca275826e241920d6; version=20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6 <8563d9fabd8a4b726ba7acab4737c438bf11a059; version=20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6 <b70b41591ec48c78ec6a885e1f57bfc4029e5e13; version=6.4

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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

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Your stack

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