Linux Kernel up to 6.12.61/6.17.11/6.18.0 OnAssocReq IE Parser memcpy stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 6.12.61/6.17.11/6.18.0. Impacted is the function memcpy of the component OnAssocReq IE Parser. The manipulation results in stack-based overflow. This vulnerability is reported as CVE-2025-68255. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.12.61/6.17.11/6.18.0. Affected is the function memcpy of the component OnAssocReq IE Parser. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix stack buffer overflow in OnAssocReq IE parsing The Supported Rates IE length from an incoming Association Request frame was used directly as the memcpy() length when copying into a fixed-size 16-byte stack buffer (supportRate). A malicious station can advertise an IE length larger than 16 bytes, causing a stack buffer overflow. Clamp ie_len to the buffer size before copying the Supported Rates IE, and correct the bounds check when merging Extended Supported Rates to prevent a second potential overflow. This prevents kernel stack corruption triggered by malformed association requests.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2025-68255 since 12/16/2025. The exploitability is told to be easy. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 02/22/2026).

The vulnerability scanner Nessus provides a plugin with the ID 296481 (SUSE SLES15 Security Update : kernel (SUSE-SU-2026:0278-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.62, 6.17.12, 6.18.1 or 6.19-rc1 eliminates this vulnerability. Applying the patch 61871c83259a511980ec2664964cecc69005398b/25411f5fcf5743131158f337c99c2bbf3f8477f5/e841d8ea722315b781c4fc5bf4f7670fbca88875/6ef0e1c10455927867cac8f0ed6b49f328f8cf95 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (296481), EUVD (EUVD-2025-203742) and CERT Bund (WID-SEC-2025-2868). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 296481
Nessus Name: SUSE SLES15 Security Update : kernel (SUSE-SU-2026:0278-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.12.62/6.17.12/6.18.1/6.19-rc1
Patch: 61871c83259a511980ec2664964cecc69005398b/25411f5fcf5743131158f337c99c2bbf3f8477f5/e841d8ea722315b781c4fc5bf4f7670fbca88875/6ef0e1c10455927867cac8f0ed6b49f328f8cf95

Timelineinfo

12/16/2025 Advisory disclosed
12/16/2025 +0 days CVE reserved
12/16/2025 +0 days VulDB entry created
02/22/2026 +68 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-68255 (🔒)
GCVE (CVE): GCVE-0-2025-68255
GCVE (VulDB): GCVE-100-336792
EUVD: 🔒
CERT Bund: WID-SEC-2025-2868 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 12/16/2025 16:07
Updated: 02/22/2026 03:01
Changes: 12/16/2025 16:07 (59), 01/12/2026 07:47 (1), 01/20/2026 04:28 (7), 01/25/2026 00:12 (2), 02/04/2026 04:20 (1), 02/22/2026 03:01 (1)
Complete: 🔍
Cache ID: 216::103

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