Linux Kernel up to 6.18.19/6.19.9/7.0-rc4 amlogic-spisg aml_spisg_probe memory leak

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.18.19/6.19.9/7.0-rc4. This impacts the function aml_spisg_probe of the component amlogic-spisg. This manipulation causes memory leak. This vulnerability is handled as CVE-2026-23431. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.18.19/6.19.9/7.0-rc4. It has been declared as critical. Affected by this vulnerability is the function aml_spisg_probe of the component amlogic-spisg. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: spi: amlogic-spisg: Fix memory leak in aml_spisg_probe() In aml_spisg_probe(), ctlr is allocated by spi_alloc_target()/spi_alloc_host(), but fails to call spi_controller_put() in several error paths. This leads to a memory leak whenever the driver fails to probe after the initial allocation. Convert to use devm_spi_alloc_host()/devm_spi_alloc_target() to fix the memory leak.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-23431 since 01/13/2026. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.18.20, 6.19.10 or 7.0-rc5 eliminates this vulnerability. Applying the patch bec21d97c968a4806939eb2946df49ea6c341bde/8e28a01b69f7ea8df7ceb15470cfe643b2828f4f/b8db9552997924b750e727a625a30eaa4603bbb9 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.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.18.0
• 6.18.1
• 6.18.2
• 6.18.3
• 6.18.4
• 6.18.5
• 6.18.6
• 6.18.7
• 6.18.8
• 6.18.9
• 6.18.10
• 6.18.11
• 6.18.12
• 6.18.13
• 6.18.14
• 6.18.15
• 6.18.16
• 6.18.17
• 6.18.18
• 6.18.19
• 6.19.0
• 6.19.1
• 6.19.2
• 6.19.3
• 6.19.4
• 6.19.5
• 6.19.6
• 6.19.7
• 6.19.8
• 6.19.9
• 7.0-rc1
• 7.0-rc2
• 7.0-rc3
• 7.0-rc4

License

• open-source

Website

• Vendor: https://www.kernel.org/

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