CVE-2025-38159

Memory disclosure via undersized coexistence buffer

Published Jul 3, 2025 · Updated May 11, 2026

An out-of-bounds read in the Linux kernel rtw88 Wi-Fi driver allows local users to disclose memory or interrupt service. The coexistence handler allocates the para array as two bytes, then passes its second byte to rtw_fw_bt_wifi_control, which reads five bytes. Reaching the flaw requires local low-privileged access and execution of the Realtek Bluetooth/Wi-Fi coexistence path; the public record does not identify whether availability loss takes the form of a hang, crash, or reboot.

CVSS severity7.1
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds read in the Linux kernel rtw88 Wi-Fi driver allows local users to disclose memory or interrupt service. The coexistence handler allocates the para array as two bytes, then passes its second byte to rtw_fw_bt_wifi_control, which reads five bytes. Reaching the flaw requires local low-privileged access and execution of the Realtek Bluetooth/Wi-Fi coexistence path; the public record does not identify whether availability loss takes the form of a hang, crash, or reboot.

The record

CVE
CVE-2025-38159
Published
Jul 3, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 3, 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=4136214f7c46839c15f0f177fe1d5052302c0205 <1ee8ea6937d13b20f90ff35d71ccc03ba448182d
  2. Affected versionversion=4136214f7c46839c15f0f177fe1d5052302c0205 <4c2c372de2e108319236203cce6de44d70ae15cd
  3. Affected versionversion=4136214f7c46839c15f0f177fe1d5052302c0205 <68a1037f0bac4de9a585aa9c879ef886109f3647
  4. Affected versionversion=4136214f7c46839c15f0f177fe1d5052302c0205 <74e18211c2c89ab66c9546baa7408288db61aa0d
  5. Affected versionversion=4136214f7c46839c15f0f177fe1d5052302c0205 <9febcc8bded8be0d7efd8237fcef599b6d93b788
  6. Affected versionversion=4136214f7c46839c15f0f177fe1d5052302c0205 <c13255389499275bc5489a0b5b7940ccea3aef04
  7. Affected versionversion=5.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4136214f7c46839c15f0f177fe1d5052302c0205 <1ee8ea6937d13b20f90ff35d71ccc03ba448182d; version=4136214f7c46839c15f0f177fe1d5052302c0205 <4c2c372de2e108319236203cce6de44d70ae15cd; version=4136214f7c46839c15f0f177fe1d5052302c0205 <68a1037f0bac4de9a585aa9c879ef886109f3647; version=4136214f7c46839c15f0f177fe1d5052302c0205 <74e18211c2c89ab66c9546baa7408288db61aa0d; version=4136214f7c46839c15f0f177fe1d5052302c0205 <9febcc8bded8be0d7efd8237fcef599b6d93b788; version=4136214f7c46839c15f0f177fe1d5052302c0205 <c13255389499275bc5489a0b5b7940ccea3aef04; version=5.4

Published CVSS scores

7.1OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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 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

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Your stack

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