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CVE-2026-46296: spi: s3c64xx: fix NULL-deref on driver unbind

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-08 · updated 2026-07-23
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: spi: s3c64xx: fix NULL-deref on driver unbind A change moving DMA channel allocation from probe() back to s3c64xx_spi_prepare_transfer() failed to remove the corresponding deallocation from remove(). Drop the bogus DMA channel release from remove() to avoid triggering a NULL-pointer dereference on driver unbind. This issue was flagged by Sashiko when reviewing a controller deregistration fix.

Affected products

• Linux kernel: from 6.0 before 6.1.176; from 6.2 before 6.6.140; from 6.7 before 6.12.88; from 6.13 before 6.18.30; from 6.19 before 7.0.7 — fixed in 6.1.176, 6.12.88, 6.18.30, 6.6.140, 7.0.7

How to fix

Upgrade to a fixed version: Linux kernel 6.1.176, 6.12.88, 6.18.30, 6.6.140. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1108b8722b9ff0cdd3e8aa18d98244fcd93b6760
• https://git.kernel.org/stable/c/1b66f16a571a10ba8889ac471755c8af9c5b9266
• https://git.kernel.org/stable/c/22788b1a8611380b141e09a8896702e32d164238
• https://git.kernel.org/stable/c/29e219a18e21258bdb4ee12cecd0e9ec87d7e6a7
• https://git.kernel.org/stable/c/323a258f4b1916b5a3098618e036e033b2f2317f
• https://git.kernel.org/stable/c/45daacbead8a009844bd5dba6cfa731332184d17

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