Linux Kernel up to 7.0-rc4 spi use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 7.0-rc4. This vulnerability affects unknown code of the component spi. Executing a manipulation can lead to use after free. This vulnerability appears as CVE-2026-31389. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.0-rc4. It has been declared as critical. This vulnerability affects an unknown function of the component spi. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: spi: fix use-after-free on controller registration failure Make sure to deregister from driver core also in the unlikely event that per-cpu statistics allocation fails during controller registration to avoid use-after-free (of driver resources) and unclocked register accesses.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2026-31389 since 03/09/2026. The exploitation appears to be easy. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 05/20/2026).

The vulnerability scanner Nessus provides a plugin with the ID 311783 (Debian dla-4561 : linux-config-6.1 - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.167, 6.6.130, 6.12.78, 6.18.20, 6.19.10 or 7.0-rc5 eliminates this vulnerability. Applying the patch 0e23f50086da7d0b183dfeac26021acfcdee086b/6bbd385b30c7fb6c7ee0669e9ada91490938c051/afe27c1f43aa57530011f419be6ddf71306565d2/80f3e8cd2b4ad355b2ad2024cf423f6d183404f7/23b51bad2eb8787aa74324cfccefb258515ae5ba/8634e05b08ead636e926022f4a98416e13440df9 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 (311783). 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: 7.9
VulDB Meta Temp Score: 7.7

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

CNA Base Score: 7.8
CNA Vector (Linux): 🔒

CVSSv2info

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

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 311783
Nessus Name: Debian dla-4561 : linux-config-6.1 - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.1.167/6.6.130/6.12.78/6.18.20/6.19.10/7.0-rc5
Patch: 0e23f50086da7d0b183dfeac26021acfcdee086b/6bbd385b30c7fb6c7ee0669e9ada91490938c051/afe27c1f43aa57530011f419be6ddf71306565d2/80f3e8cd2b4ad355b2ad2024cf423f6d183404f7/23b51bad2eb8787aa74324cfccefb258515ae5ba/8634e05b08ead636e926022f4a98416e13440df9

Timelineinfo

03/09/2026 CVE reserved
04/03/2026 +24 days Advisory disclosed
04/03/2026 +0 days VulDB entry created
05/20/2026 +47 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-31389 (🔒)
GCVE (CVE): GCVE-0-2026-31389
GCVE (VulDB): GCVE-100-355138

Entryinfo

Created: 04/03/2026 18:11
Updated: 05/20/2026 20:20
Changes: 04/03/2026 18:11 (58), 05/04/2026 21:37 (2), 05/20/2026 20:20 (11)
Complete: 🔍
Cache ID: 216::103

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

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