Linux Kernel up to 7.1.4 spi init_completion uninitialized pointer

CVSS Meta Temp Score
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CTI Interest Score
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7.8$0-$5k0.00+

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.1.4. It has been rated as very critical. This affects the function init_completion of the component spi. This manipulation causes uninitialized pointer. This vulnerability is tracked as CVE-2026-72133. The attack is restricted to local execution. No exploit exists.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.1.4. It has been declared as very critical. Affected by this vulnerability is the function init_completion of the component spi. The manipulation with an unknown input leads to a uninitialized pointer vulnerability. The CWE definition for the vulnerability is CWE-824. The product accesses or uses a pointer that has not been initialized. 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: spi: uniphier: Fix completion initialization order before devm_request_irq() The driver calls devm_request_irq() before initializing the completion used by the interrupt handler. Because the interrupt may occur immediately after devm_request_irq(), the handler may execute before init_completion(). This may result in calling complete() on an uninitialized completion, causing undefined behavior. This has been observed with KASAN. Fix this by initializing the completion before registering the IRQ.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-72133 since 08/09/2026. The exploitation appears to be easy. Attacking locally is a requirement. Additional levels of successful authentication are required for exploitation. 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 08/15/2026).

Upgrading to version 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5 or 7.2-rc1 eliminates this vulnerability. Applying the patch b9fcf0db433d79648ace74bc2b8b88f91e306304/82a5746c4c9e94f6f816ec7edea6ddc24417c6a5/f4bb0a91f7badd6d15ac8d783a1169d9e1e95c17/49f6705d80b5e6175d8435d9c72b66bd516a8e89/8b5798ce0007874c14611b8ee4ce6c749855260e/d44b828eb551bd59ba9f22457825cc3db3a39fc1/077a7bc1c32d3da9670c5e282ea3e5ac8a94be59/f3ad1c87d8201e54b66bd6072442f0b5d5a308ee is able to eliminate this problem.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 7.8

VulDB Base Score: 8.2
VulDB Temp Score: 7.8
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: No

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 5.10.261/5.15.212/6.1.178/6.6.145/6.12.97/6.18.40/7.1.5/7.2-rc1
Patch: b9fcf0db433d79648ace74bc2b8b88f91e306304/82a5746c4c9e94f6f816ec7edea6ddc24417c6a5/f4bb0a91f7badd6d15ac8d783a1169d9e1e95c17/49f6705d80b5e6175d8435d9c72b66bd516a8e89/8b5798ce0007874c14611b8ee4ce6c749855260e/d44b828eb551bd59ba9f22457825cc3db3a39fc1/077a7bc1c32d3da9670c5e282ea3e5ac8a94be59/f3ad1c87d8201e54b66bd6072442f0b5d5a308ee

Timelineinfo

08/09/2026 CVE reserved
08/15/2026 +6 days Advisory disclosed
08/15/2026 +0 days VulDB entry created
08/15/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-72133 (🔒)
GCVE (CVE): GCVE-0-2026-72133
GCVE (VulDB): GCVE-100-390607

Entryinfo

Created: 08/15/2026 13:16
Changes: 08/15/2026 13:16 (59)
Complete: 🔍
Cache ID: 216::103

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