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CVE-2026-31527: driver core: platform: use generic driver_override infrastructure

• Severity: high (CVSS 7.8 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: 2026-04-22 · updated 2026-06-17
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: driver core: platform: use generic driver_override infrastructure When a driver is probed through __driver_attach(), the bus' match() callback is called without the device lock held, thus accessing the driver_override field without a lock, which can cause a UAF. Fix this by using the driver-core driver_override infrastructure taking care of proper locking internally. Note that calling match() from __driver_attach() without the device lock held is intentional. [1]

Affected products

• Linux kernel: from 3.17 before 6.12.80; from 6.13 before 6.18.21; from 6.19 before 6.19.11; 7.0-rc1, 7.0-rc2, 7.0-rc3, 7.0-rc4 — fixed in 6.12.80, 6.18.21, 6.19.11

How to fix

Upgrade to a fixed version: Linux kernel 6.12.80, 6.18.21, 6.19.11. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2b38efc05bf7a8568ec74bfffea0f5cfa62bc01d
• https://git.kernel.org/stable/c/492349e5e4a369a8b62781100a3ade470bf1ce6b
• https://git.kernel.org/stable/c/7c02a9bd7d14a89065fcf672b86d8e1d1a41d3b1
• https://git.kernel.org/stable/c/9a6086d2a828dd2ff74cf9abcae456670febd71f
• https://git.kernel.org/stable/c/edee7ee5a14c3b33f6d54641f5af5c5e9180992d

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