CVE-2026-90281
phy: qcom: snps-femto-v2: Fix possible NULL-deref on early runtime suspend
Description
In the Linux kernel, the following vulnerability has been resolved: phy: qcom: snps-femto-v2: Fix possible NULL-deref on early runtime suspend Runtime PM must be enabled before creating the PHY, since phy_create() only enables runtime PM on the PHY device if it is already enabled on this parent device. However, the runtime PM callbacks dereference the hsphy instance, which is not yet ready, leaving a window where a suspend callback may trigger a NULL pointer dereference. Take a runtime PM usage reference with pm_runtime_get_noresume() before enabling runtime PM and release it once the PHY has been created, so that no runtime suspend can run before the PHY is ready. This also prevents a short window where an unnecessary runtime suspend can occur. Use the devres-managed version to ensure PM runtime is symmetrically disabled during driver removal for proper cleanup.
INFO
Published Date :
Sept. 17, 2026, 5:17 p.m.
Last Modified :
Sept. 17, 2026, 5:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Get runtime PM usage reference before enabling runtime PM.
- Release reference after PHY device has been created.
- Use devres-managed version for PM runtime cleanup.
References to Advisories, Solutions, and Tools
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CVE-2026-90281.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-90281 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-90281
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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CVE-2026-90281 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-90281 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 17, 2026
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: phy: qcom: snps-femto-v2: Fix possible NULL-deref on early runtime suspend Runtime PM must be enabled before creating the PHY, since phy_create() only enables runtime PM on the PHY device if it is already enabled on this parent device. However, the runtime PM callbacks dereference the hsphy instance, which is not yet ready, leaving a window where a suspend callback may trigger a NULL pointer dereference. Take a runtime PM usage reference with pm_runtime_get_noresume() before enabling runtime PM and release it once the PHY has been created, so that no runtime suspend can run before the PHY is ready. This also prevents a short window where an unnecessary runtime suspend can occur. Use the devres-managed version to ensure PM runtime is symmetrically disabled during driver removal for proper cleanup. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/90xxx/CVE-2026-90281.json">CVE-2026-90281</a> Added Reference https://git.kernel.org/stable/c/0c5c08c94dd64c05679970d4eed8b06d36a889a8 Added Reference https://git.kernel.org/stable/c/1027b1d4e29756dfbf74ef8743456a1efa3679f0 Added Reference https://git.kernel.org/stable/c/34293f5a8982a06c40af69c8c7c856b5837ac652 Added Reference https://git.kernel.org/stable/c/3ddf41938fee3d148a170c31e76b0515a522ef7e Added Reference https://git.kernel.org/stable/c/61749681e4a3629ec20b04ba2443b91016af3d2f Added Reference https://git.kernel.org/stable/c/82cb1aedf4bdb279cf8853fe8f39bec4e6cffa0a Added Reference https://git.kernel.org/stable/c/b85bbec72fa813b60e093c6bb36ae232b9b0eb5e Added Reference https://git.kernel.org/stable/c/c271a6926ea7d3c9566b033d63fd4e8c488dc860