Linux Kernel up to 6.14.5/6.15-rc4 SPI spi_mem_calc_op_duration divide by zero

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.14.5/6.15-rc4. It has been rated as problematic. This issue affects the function spi_mem_calc_op_duration of the component SPI. Performing a manipulation results in an unknown weakness. This vulnerability is reported as CVE-2025-37896. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.14.5/6.15-rc4. It has been classified as problematic. This affects the function spi_mem_calc_op_duration of the component SPI. CWE is classifying the issue as CWE-369. The product divides a value by zero. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: spi: spi-mem: Add fix to avoid divide error For some SPI flash memory operations, dummy bytes are not mandatory. For example, in Winbond SPINAND flash memory devices, the `write_cache` and `update_cache` operation variants have zero dummy bytes. Calculating the duration for SPI memory operations with zero dummy bytes causes a divide error when `ncycles` is calculated in the spi_mem_calc_op_duration(). Add changes to skip the 'ncylcles' calculation for zero dummy bytes. Following divide error is fixed by this change: Oops: divide error: 0000 [#1] PREEMPT SMP NOPTI ... ? do_trap+0xdb/0x100 ? do_error_trap+0x75/0xb0 ? spi_mem_calc_op_duration+0x56/0xb0 ? exc_divide_error+0x3b/0x70 ? spi_mem_calc_op_duration+0x56/0xb0 ? asm_exc_divide_error+0x1b/0x20 ? spi_mem_calc_op_duration+0x56/0xb0 ? spinand_select_op_variant+0xee/0x190 [spinand] spinand_match_and_init+0x13e/0x1a0 [spinand] spinand_manufacturer_match+0x6e/0xa0 [spinand] spinand_probe+0x357/0x7f0 [spinand] ? kernfs_activate+0x87/0xd0 spi_mem_probe+0x7a/0xb0 spi_probe+0x7d/0x130

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2025-37896 since 04/16/2025. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 242283 (Ubuntu 24.04 LTS : Linux kernel (OEM) vulnerabilities (USN-7650-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.14.6 or 6.15-rc5 eliminates this vulnerability. Applying the patch 1915dbd67dadc0bb35670c8e28229baa29368d17/8e4d3d8a5e51e07bd0d6cdd81b5e4af79f796927 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 databases at Tenable (242283) and CERT Bund (WID-SEC-2025-1114). Be aware that VulDB is the high quality source for vulnerability data.

Affected

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• Dell Avamar
• Open Source Linux Kernel
• Dell NetWorker
• Dell Secure Connect Gateway

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.14.0
• 6.14.1
• 6.14.2
• 6.14.3
• 6.14.4
• 6.14.5
• 6.15-rc1
• 6.15-rc2
• 6.15-rc3
• 6.15-rc4

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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