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Vulnerability record · CVE-2026-23068 · published 4 February 2026

CVE-2026-23068: Linux kernel double free vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: spi: spi-sprd-adi: Fix double free in probe error path The driver currently uses spi_alloc_host() to allocate the controller but registers it using devm_spi_register_controller(). If devm_register_restart_handler() fails, the code jumps to the put_ctlr label and calls spi_controller_put(). However, since the controller was registered via a devm function, the device core will automatically call spi_controller_put() again when the probe fails. This results in a double-free of the spi_controller structure. Fix this by switching to devm_spi_alloc_host() and removing the manual spi_controller_put() call.

7.8 CVSS 3.1 High EPSS 0.14% · top 97.4% CWE-415 · Double free
7.8CVSS 3.1 base score
0.14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
17 Jun 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: spi: spi-sprd-adi: Fix double free in probe error path The driver currently uses spi_alloc_host() to allocate the controller but registers it using devm_spi_register_controller(). If devm_register_restart_handler() fails, the code jumps to the put_ctlr label and calls spi_controller_put(). However, since the controller was registered via a devm function, the device core will automatically call spi_controller_put() again when the probe fails. This results in a double-free of the spi_controller structure. Fix this by switching to devm_spi_alloc_host() and removing the manual spi_controller_put() call.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/346775f2b4cf839177e8e86b94aa180a06dc15b0 Patch
https://git.kernel.org/stable/c/383d4f5cffcc8df930d95b06518a9d25a6d74aac Patch
https://git.kernel.org/stable/c/417cdfd9b9f986e95bfcb1d68eb443e6e0a15f8c Patch
https://git.kernel.org/stable/c/bddd3d10d039729b81cfb0804520c8832a701a0e Patch
https://git.kernel.org/stable/c/f6d6b3f172df118db582fe5ec43ae223a55d99cf Patch

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Source: NIST National Vulnerability Database (record CVE-2026-23068), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.