# CVE-2026-31572: i2c: designware: amdisp: Fix resume-probe race condition issue

Status: published. Published: 2026-04-24. Updated: 2026-11-05.

In the Linux kernel, the following vulnerability has been resolved:

i2c: designware: amdisp: Fix resume-probe race condition issue

Identified resume-probe race condition in kernel v7.0 with the commit
38fa29b01a6a ("i2c: designware: Combine the init functions"),but this
issue existed from the beginning though not detected.

The amdisp i2c device requires ISP to be in power-on state for probe
to succeed. To meet this requirement, this device is added to genpd
to control ISP power using runtime PM. The pm_runtime_get_sync() called
before i2c_dw_probe() triggers PM resume, which powers on ISP and also
invokes the amdisp i2c runtime resume before the probe completes resulting
in this race condition and a NULL dereferencing issue in v7.0

Fix this race condition by using the genpd APIs directly during probe:
  - Call dev_pm_genpd_resume() to Power ON ISP before probe
  - Call dev_pm_genpd_suspend() to Power OFF ISP after probe
  - Set the device to suspended state with pm_runtime_set_suspended()
  - Enable runtime PM only after the device is fully initialized

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ d6263c468a761cd4c89887073614394ac48441e1; < 83bcea9da91965484df64a6492b89e65d41ab31c (affected, git); ≥ d6263c468a761cd4c89887073614394ac48441e1; < e81f0341754c309e33babea2821eda8f98f0b44c (affected, git); ≥ d6263c468a761cd4c89887073614394ac48441e1; < e2f1ada8e089dd5a331bcd8b88125ae2af8d188f (affected, git). Source: CNA: Linux
- Linux / Linux: 6.16 (affected); ≥ 0; < 6.16 (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: 0.09% as of 2026-11-05; percentile 0.36%

- 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/83bcea9da91965484df64a6492b89e65d41ab31c (CNA: Linux)

- https://git.kernel.org/stable/c/e81f0341754c309e33babea2821eda8f98f0b44c (CNA: Linux)

- https://git.kernel.org/stable/c/e2f1ada8e089dd5a331bcd8b88125ae2af8d188f (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-31572; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-31572; retrieved 2026-11-05; source updated Not reported

Revision: 66e5ad7d70232f95774d9adabdb817d13900fe9753c84681914c0b65ec56c8c9

Canonical: https://y2.dev/cve/CVE-2026-31572

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