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

Status: published. Published: 2026-04-22. Updated: 2026-11-05.

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]

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 3d713e0e382e6fcfb4bba1501645b66c129ad60b; < 492349e5e4a369a8b62781100a3ade470bf1ce6b (affected, git); ≥ 3d713e0e382e6fcfb4bba1501645b66c129ad60b; < 9a6086d2a828dd2ff74cf9abcae456670febd71f (affected, git); ≥ 3d713e0e382e6fcfb4bba1501645b66c129ad60b; < 7c02a9bd7d14a89065fcf672b86d8e1d1a41d3b1 (affected, git); ≥ 3d713e0e382e6fcfb4bba1501645b66c129ad60b; < edee7ee5a14c3b33f6d54641f5af5c5e9180992d (affected, git); ≥ 3d713e0e382e6fcfb4bba1501645b66c129ad60b; < 2b38efc05bf7a8568ec74bfffea0f5cfa62bc01d (affected, git). Source: CNA: Linux
- Linux / Linux: 3.17 (affected); ≥ 0; < 3.17 (unaffected, semver); ≥ 6.6.142; ≤ 6.6.* (unaffected, semver); ≥ 6.12.80; ≤ 6.12.* (unaffected, semver); ≥ 6.18.21; ≤ 6.18.* (unaffected, semver); ≥ 6.19.11; ≤ 6.19.* (unaffected, semver); ≥ 7.0; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.13% as of 2026-11-05; percentile 2.53%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/492349e5e4a369a8b62781100a3ade470bf1ce6b (CNA: Linux)

- https://git.kernel.org/stable/c/9a6086d2a828dd2ff74cf9abcae456670febd71f (CNA: Linux)

- https://git.kernel.org/stable/c/7c02a9bd7d14a89065fcf672b86d8e1d1a41d3b1 (CNA: Linux)

- https://git.kernel.org/stable/c/edee7ee5a14c3b33f6d54641f5af5c5e9180992d (CNA: Linux)

- https://git.kernel.org/stable/c/2b38efc05bf7a8568ec74bfffea0f5cfa62bc01d (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-31527; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-31527; retrieved 2026-11-05; source updated Not reported

Revision: dd963607b87cd0551ffba6e601edce6ee5182fca6960139b080f9e29a38849fe

Canonical: https://y2.dev/cve/CVE-2026-31527

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