Linux Kernel up to 6.12.74/6.18.15/6.19.5 clk rs9_driver_data out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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7.6$5k-$25k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.12.74/6.18.15/6.19.5. It has been rated as critical. Affected is the function rs9_driver_data of the component clk. This manipulation causes out-of-bounds write. The identification of this vulnerability is CVE-2026-43175. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.12.74/6.18.15/6.19.5. Affected by this vulnerability is the function rs9_driver_data of the component clk. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: clk: rs9: Reserve 8 struct clk_hw slots for for 9FGV0841 The 9FGV0841 has 8 outputs and registers 8 struct clk_hw, make sure there are 8 slots for those newly registered clk_hw pointers, else there is going to be out of bounds write when pointers 4..7 are set into struct rs9_driver_data .clk_dif[4..7] field. Since there are other structure members past this struct clk_hw pointer array, writing to .clk_dif[4..7] fields corrupts both the struct rs9_driver_data content and data around it, sometimes without crashing the kernel. However, the kernel does surely crash when the driver is unbound or during suspend. Fix this, increase the struct clk_hw pointer array size to the maximum output count of 9FGV0841, which is the biggest chip that is supported by this driver.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-43175 since 05/01/2026. The exploitation appears to be easy. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/25/2026).

The vulnerability scanner Nessus provides a plugin with the ID 329305 (openSUSE 16: cluster-md-kmp-64kb / cluster-md-kmp-azure / cluster-md-kmp-default / etc (openSUSE-SU-2026:21388-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.75, 6.18.16 or 6.19.6 eliminates this vulnerability. Applying the patch 2f926875dffe2226ea26d129e16d9092cccd03aa/da86ca15d7389ee0b5df08e8f70c39354e6b8a4b/82a34f344999d8029bcebf131028fa519140c7cc/5ec820fc28d0b8a0f3890d476b1976f20e8343cc 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 vulnerability database at Tenable (329305). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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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: Out-of-bounds write
CWE: CWE-787 / 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: 329305
Nessus Name: openSUSE 16: cluster-md-kmp-64kb / cluster-md-kmp-azure / cluster-md-kmp-default / etc (openSUSE-SU-2026:21388-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.12.75/6.18.16/6.19.6
Patch: 2f926875dffe2226ea26d129e16d9092cccd03aa/da86ca15d7389ee0b5df08e8f70c39354e6b8a4b/82a34f344999d8029bcebf131028fa519140c7cc/5ec820fc28d0b8a0f3890d476b1976f20e8343cc

Timelineinfo

05/01/2026 CVE reserved
05/06/2026 +5 days Advisory disclosed
05/06/2026 +0 days VulDB entry created
07/25/2026 +80 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-43175 (🔒)
GCVE (CVE): GCVE-0-2026-43175
GCVE (VulDB): GCVE-100-361459

Entryinfo

Created: 05/06/2026 16:49
Updated: 07/25/2026 10:58
Changes: 05/06/2026 16:49 (59), 07/25/2026 10:58 (4)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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