rtc: pcf8563: fix clock provider leak on unbind
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
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- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 4 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: rtc: pcf8563: fix clock provider leak on unbind pcf8563_clkout_register_clk() registers the CLKOUT clock provider with of_clk_add_provider(), but nothing ever unwinds it: there is no of_clk_del_provider() call and the driver has no remove callback. Each of_clk_add_provider() allocates a struct of_clk_provider, takes a reference on the OF node and adds an entry to the global of_clk_providers list, none of which is released when the device is unbound. Every bind/unbind (or module reload) therefore leaks a provider structure and an of_node reference. The clock itself is already device-managed (devm_clk_register()); only the provider registration was not. Use devm_of_clk_add_hw_provider() so the provider is removed automatically on unbind. Tie it to the parent i2c device, whose OF node carries the #clock-cells and clock-output-names properties (the RTC class device has no OF node of its own).
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6, 7.3
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
Not affected: 2 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2026-90126
- 2026-10-03 Alias added: GHSA-7jrh-4gfg-rh69
- 2026-10-06 Affected versions changed · Red Hat
- 2026-10-06 CVSS score added · Red Hat
- 2026-10-19 Fix available: Linux/[email protected] · CNA
References
Other 8
- https://git.kernel.org/stable/c/2b5622cf4ee218b6f98d31dbf3fbd44b9b6bd675
- https://git.kernel.org/stable/c/36cb00c33bd83e7ce31b5a9f1f7c70db0cb7776c
- https://git.kernel.org/stable/c/30b7c63af50fe1464e7582a37de1ca4bd030ecc1
- https://git.kernel.org/stable/c/7afb8db47c4f107bce89cfe5115fb31ba7c94665
- https://git.kernel.org/stable/c/97edf3fd9a46ea89a167966991c0449cfa07b36f
- https://git.kernel.org/stable/c/08a59c28c2bdbcd655e99526c86a41dc83834283
- https://git.kernel.org/stable/c/6218c0533a72235ec9c5f41b812c63d963bd4a3e
- https://git.kernel.org/stable/c/9c48a53685040bb0de45a640b34055cbbfc69d4f
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Sources
- CVE-2026-90126 · CVE Program
- CVE-2026-90126 · NVD
- FIRST EPSS
- GHSA-7jrh-4gfg-rh69 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-90126 · Red Hat security data · CC BY 4.0
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