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CVE-2022-50192: spi: tegra20-slink: fix UAF in tegra_slink_remove()

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-18 · updated 2026-06-17
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: spi: tegra20-slink: fix UAF in tegra_slink_remove() After calling spi_unregister_master(), the refcount of master will be decrease to 0, and it will be freed in spi_controller_release(), the device data also will be freed, so it will lead a UAF when using 'tspi'. To fix this, get the master before unregister and put it when finish using it.

Affected products

• Linux kernel: from 5.15 before 5.15.61; from 5.16 before 5.18.18; from 5.19 before 5.19.2 — fixed in 5.15.61, 5.18.18, 5.19.2

How to fix

Upgrade to a fixed version: Linux kernel 5.15.61, 5.18.18, 5.19.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/415b4ce61308f24583912d887772dfcbf97f1d20
• https://git.kernel.org/stable/c/67f77172644260482fdafc03b6025847944701e5
• https://git.kernel.org/stable/c/7e9984d183bb1e99e766c5c2b950ff21f7f7b6c0
• https://git.kernel.org/stable/c/800c7767e05d29656713e04532823a752e57e037

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