CVE-2026-98535 Linux CVE debrief

Who should care

Linux kernel maintainers, Linux distribution maintainers, and users of affected systems should assess their exposure and prioritize patching or applying compensating controls. This includes operators managing Linux kernel deployments, platform administrators, vulnerability management teams, and security teams responsible for monitoring and mitigating potential security risks.

Why it matters

This vulnerability in the Linux kernel's fsl/fman component can lead to memory leaks and potential security risks if not patched. Linux kernel maintainers and users should assess exposure and prioritize patching.

• Denial-of-service (DoS) risks due to memory leaks.
• Potential information disclosure risks if exploited.

Technical summary

The Linux kernel's fsl/fman component has a clock reference leak in the read_dts_node() function due to of_clk_get() returning a clock with an incremented reference count without a corresponding clk_put() call, resulting in a memory leak. This issue can lead to denial-of-service (DoS) risks and potential information disclosure if exploited. Linux kernel maintainers and users should assess exposure and prioritize patching or applying compensating controls to mitigate these risks. The clock is not stored, making it impossible to release the reference later. To fix this, the clock should be released after its rate has been read, covering both normal execution and error paths where the rate is zero.

Defensive priority

Linux kernel maintainers and users should assess exposure and prioritize patching or applying compensating controls to mitigate potential denial-of-service (DoS) or information disclosure risks.

Recommended defensive actions

• Review and apply the provided patch to the Linux kernel's fsl/fman component.
• Assess the system's exposure to this vulnerability and prioritize patching.
• Monitor system logs for potential exploitation attempts.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and associated source references provide details on the vulnerability. However, the scope of affected systems, exploitation attempts, and specific attack vectors are not clearly documented in the provided corpus.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.