CVE-2025-68255

Kernel memory corruption via oversized Supported Rates IE

Published Dec 16, 2025 · Updated Dec 16, 2025

Stack buffer overflow in the Linux rtl8723bs driver allows remote attackers to corrupt kernel memory via an Association Request. OnAssocReq passes the untrusted Supported Rates IE length to memcpy when copying into the 16-byte supportRate stack buffer and can also overflow while merging Extended Supported Rates. Exploitation requires the driver to operate as a wireless access point and the attacker to be within radio range; successful corruption can crash the kernel or alter kernel execution.

CVSS severity8.8
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in the Linux rtl8723bs driver allows remote attackers to corrupt kernel memory via an Association Request. OnAssocReq passes the untrusted Supported Rates IE length to memcpy when copying into the 16-byte supportRate stack buffer and can also overflow while merging Extended Supported Rates. Exploitation requires the driver to operate as a wireless access point and the attacker to be within radio range; successful corruption can crash the kernel or alter kernel execution.

The record

CVE
CVE-2025-68255
Published
Dec 16, 2025
Updated
Dec 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 16, 2025Record 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <25411f5fcf5743131158f337c99c2bbf3f8477f5
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <61871c83259a511980ec2664964cecc69005398b
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6ef0e1c10455927867cac8f0ed6b49f328f8cf95
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e841d8ea722315b781c4fc5bf4f7670fbca88875

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <25411f5fcf5743131158f337c99c2bbf3f8477f5; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <61871c83259a511980ec2664964cecc69005398b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6ef0e1c10455927867cac8f0ed6b49f328f8cf95; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e841d8ea722315b781c4fc5bf4f7670fbca88875

Published CVSS scores

8.8UbuntuCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8LinuxCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.3Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1210Exploitation of Remote Services

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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