Clock reference leak in Linux kernel fsl/fman read_dts_node()
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
- —
- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 1 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
The Linux kernel from 4.5 is affected by a clock reference leak in the fsl/fman driver. The read_dts_node() function gets a clock with of_clk_get(), which increments its reference count, but never releases it with clk_put(). The clock is not stored anywhere, so the reference cannot be released later.
Written with Claude Haiku 5.5 from the sources below · 2026-10-30
Description from the CNA
In the Linux kernel, the following vulnerability has been resolved: fsl/fman: Fix clk reference leak in read_dts_node() of_clk_get() returns a clock with its reference count incremented, but read_dts_node() only uses it to read the rate and never calls clk_put(). The clock is not stored anywhere, so the reference cannot be released later either. Release the clock once its rate has been read, which also covers the error path taken when the rate is zero.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
Update the Linux kernel to 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, 6.18.55, 7.2.9 or 7.3. Red Hat lists Red Hat Enterprise Linux 10 as affected, with no fix and no fix plan available.
Written with Claude Haiku 5.5 from the sources below · 2026-10-30
- Fix · CNA Linux (Linux) Fixed in 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, 6.18.55, 7.2.9, 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 |
Not affected: 6 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Container Platform 5
Timeline
- 2026-10-18 Threatist record created from CVE-2026-98535
- 2026-10-18 Alias added: GHSA-qmfm-wg2c-j3hg
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-10-20 Affected versions changed · Red Hat
- 2026-10-20 CVSS score added · Red Hat
- 2026-10-30 Affected versions changed · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/874fd58b321a9238e47c2a46345444287f2a5781
- https://git.kernel.org/stable/c/c2edf376d7804279878b207d93ffe6009c8d3d29
- https://git.kernel.org/stable/c/5c90f99ba74b55ddd8e919224921033cc4077f01
- https://git.kernel.org/stable/c/e560bdf62b11dcaa2a018345f76869d89ed43a9e
- https://git.kernel.org/stable/c/9fd6d0861ae2fd44c771d6bc93b29bbc1202fe8e
- https://git.kernel.org/stable/c/c2a5e591858629b6c0e284010d2ccdbc22fd0a43
- https://git.kernel.org/stable/c/cb52f9f188c3174761ad3b37db9de751e002b52c
- https://git.kernel.org/stable/c/a644f09b2090ad22a13fbcf9d141084f573108ef
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Sources
- CVE-2026-98535 · CVE Program
- CVE-2026-98535 · NVD
- FIRST EPSS
- GHSA-qmfm-wg2c-j3hg · GitHub Advisory Database · CC BY 4.0
- CVE-2026-98535 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences