Linux Kernel debugfs simple_write_to_buffer uninitialized pointer

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.4$0-$5k3.18

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel. This issue affects the function simple_write_to_buffer of the component debugfs. Performing a manipulation results in uninitialized pointer. This vulnerability is known as CVE-2026-68089. Attacking locally is a requirement. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel (version now known). This affects the function simple_write_to_buffer of the component debugfs. The manipulation with an unknown input leads to a uninitialized pointer vulnerability. CWE is classifying the issue as CWE-824. The product accesses or uses a pointer that has not been initialized. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: iio: core: fix uninitialized data in debugfs If *ppos is non-zero then simple_write_to_buffer() will not initialize the start of buf[]. Non zero values for *ppos aren't going to work anyway. Test for them at the start of the function and return -EINVAL.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-68089 since 07/30/2026. The exploitability is told to be easy. Attacking locally is a requirement. The exploitation requires an enhanced level of successful authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/10/2026).

Applying the patch e166a8cfb28a3d0da260dd70cae274eb8c7cec8d/89fbd3e32dffb6227f936a9578e6eb4632aa4580/ab92ed206d41fd171ebd37bc46360d9f2140d043 is able to eliminate this problem.

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

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.7
VulDB Temp Score: 7.4
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 pointer
CWE: CWE-824 / CWE-908
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

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

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: e166a8cfb28a3d0da260dd70cae274eb8c7cec8d/89fbd3e32dffb6227f936a9578e6eb4632aa4580/ab92ed206d41fd171ebd37bc46360d9f2140d043

Timelineinfo

07/30/2026 CVE reserved
08/10/2026 +11 days Advisory disclosed
08/10/2026 +0 days VulDB entry created
08/10/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-68089 (🔒)
GCVE (CVE): GCVE-0-2026-68089
GCVE (VulDB): GCVE-100-387435

Entryinfo

Created: 08/10/2026 14:26
Changes: 08/10/2026 14:26 (57)
Complete: 🔍
Cache ID: 216::103

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