CVE-2025-37796

Kernel crash via freed USB device pointer

Published May 1, 2025 · Updated May 11, 2026

Use-after-free in the Linux at76c50x USB Wi-Fi driver allows local users to crash the kernel when an affected adapter disconnects. In at76_disconnect, at76_delete_device frees priv through ieee80211_free_hw, after which usb_put_dev dereferences priv->udev. Reachability requires local access and an at76c50x USB adapter using the driver; the freed-pointer access can crash the kernel or leak a USB-device reference.

CVSS severity7.8
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux at76c50x USB Wi-Fi driver allows local users to crash the kernel when an affected adapter disconnects. In at76_disconnect, at76_delete_device frees priv through ieee80211_free_hw, after which usb_put_dev dereferences priv->udev. Reachability requires local access and an at76c50x USB adapter using the driver; the freed-pointer access can crash the kernel or leak a USB-device reference.

The record

CVE
CVE-2025-37796
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=29e20aa6c6aff35c81d4da2e2cd516dadb569061 <152721cbae42713ecfbca6847e0f102ee6b19546
  2. Affected versionversion=29e20aa6c6aff35c81d4da2e2cd516dadb569061 <27c7e63b3cb1a20bb78ed4a36c561ea4579fd7da
  3. Affected versionversion=29e20aa6c6aff35c81d4da2e2cd516dadb569061 <3c619aec1f538333b56746d2f796aab1bca5c9a5
  4. Affected versionversion=29e20aa6c6aff35c81d4da2e2cd516dadb569061 <5e7df74745700f059dc117a620e566964a2e8f2c
  5. Affected versionversion=29e20aa6c6aff35c81d4da2e2cd516dadb569061 <6e4ab3e574c2a335b40fa1f70d1c54fcb58ab33f
  6. Affected versionversion=29e20aa6c6aff35c81d4da2e2cd516dadb569061 <7ca513631fa6ad3011b8b9197cdde0f351103704
  7. Affected versionversion=29e20aa6c6aff35c81d4da2e2cd516dadb569061 <a9682bfef2cf3802515a902e964d774e137be1b9
  8. Affected versionversion=29e20aa6c6aff35c81d4da2e2cd516dadb569061 <c731cdfddcf1be1590d5ba8c9b508f98e3a2b3d6
  9. Affected versionversion=3.17

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=29e20aa6c6aff35c81d4da2e2cd516dadb569061 <152721cbae42713ecfbca6847e0f102ee6b19546; version=29e20aa6c6aff35c81d4da2e2cd516dadb569061 <27c7e63b3cb1a20bb78ed4a36c561ea4579fd7da; version=29e20aa6c6aff35c81d4da2e2cd516dadb569061 <3c619aec1f538333b56746d2f796aab1bca5c9a5; version=29e20aa6c6aff35c81d4da2e2cd516dadb569061 <5e7df74745700f059dc117a620e566964a2e8f2c; version=29e20aa6c6aff35c81d4da2e2cd516dadb569061 <6e4ab3e574c2a335b40fa1f70d1c54fcb58ab33f; version=29e20aa6c6aff35c81d4da2e2cd516dadb569061 <7ca513631fa6ad3011b8b9197cdde0f351103704; version=29e20aa6c6aff35c81d4da2e2cd516dadb569061 <a9682bfef2cf3802515a902e964d774e137be1b9; version=29e20aa6c6aff35c81d4da2e2cd516dadb569061 <c731cdfddcf1be1590d5ba8c9b508f98e3a2b3d6; version=3.17

Published CVSS scores

5.5OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8NIST NVDCVSS: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.

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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-416Use After Free

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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