Linux Kernel up to 7.2.5 Visconti Clock Driver visconti_clk_register_gate uninitialized variable

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.5$0-$5k0.00-

Summaryinfo

A vulnerability described as very critical has been identified in Linux Kernel up to 6.1.187/6.6.156/6.12.109/6.18.51/7.2.5. Impacted is the function visconti_clk_register_gate of the component Visconti Clock Driver. Executing a manipulation can lead to uninitialized variable. This vulnerability is tracked as CVE-2026-90122. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.1.187/6.6.156/6.12.109/6.18.51/7.2.5 and classified as very critical. This vulnerability affects the function visconti_clk_register_gate of the component Visconti Clock Driver. The manipulation with an unknown input leads to a uninitialized variable vulnerability. The CWE definition for the vulnerability is CWE-457. The code uses a variable that has not been initialized, leading to unpredictable or unintended results. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: clk: visconti: Make sure clk_init_data is fully initialized The clk_init_data structure contains several mutually-exclusive members for different methods to specify the possible parents of a clock, prompting drivers to initialize only the members they need. However, not initializing all members may cause subtle issues, which are only exposed when CONFIG_INIT_STACK_ALL_PATTERN or CONFIG_INIT_STACK_NONE is enabled. visconti_clk_register_gate() fills in init.parent_data, and assumes that init.parent_names is NULL. However, the latter in uninitialized, and thus may cause a crash. Make sure all members are fully initialized, to fix such bugs, and to avoid future breakage when converting drivers to a different method for specifying the parents.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2026-90122 since 09/11/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/17/2026).

Upgrading to version 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6 or 7.3-rc1 eliminates this vulnerability. Applying the patch 0e97c22b286e1918c6f48bad7e77fb8240a24b4a/9f756f1965bad65e6066608f33c36988cd10302a/1cc0539e5b0906bace15d3fc7347b344a017cc02/8f7980033e9f7ecaaecd873a0b5bf6b6c87d7e5a/5ecfa72e74c6e2a765fa5bc1da574e5beae588f2/39c0e6c844a14945040cca4ccf6997792ab764c4 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Uninitialized variable
CWE: CWE-457 / CWE-453
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.1.188/6.6.157/6.12.110/6.18.52/7.2.6/7.3-rc1
Patch: 0e97c22b286e1918c6f48bad7e77fb8240a24b4a/9f756f1965bad65e6066608f33c36988cd10302a/1cc0539e5b0906bace15d3fc7347b344a017cc02/8f7980033e9f7ecaaecd873a0b5bf6b6c87d7e5a/5ecfa72e74c6e2a765fa5bc1da574e5beae588f2/39c0e6c844a14945040cca4ccf6997792ab764c4

Timelineinfo

09/11/2026 CVE reserved
09/17/2026 +6 days Advisory disclosed
09/17/2026 +0 days VulDB entry created
09/17/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-90122 (🔒)
GCVE (CVE): GCVE-0-2026-90122
GCVE (VulDB): GCVE-100-406642

Entryinfo

Created: 09/17/2026 19:43
Changes: 09/17/2026 19:43 (59)
Complete: 🔍
Cache ID: 216::103

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