In the Linux kernel, the following vulnerability has been resolved: ethtool: rss: fix indir_table and hkey leak on get_rxfh failure… (CVE-2026-63999)
Description
A memory leak vulnerability in the Linux kernel's ethtool component related to Receive Side Scaling (RSS) was fixed. The issue caused allocated buffers for the indirection table and hash key to not be freed if the get_rxfh() function failed, leading to resource leakage in the kernel. No specific affected versions or CVSS score details beyond a medium severity rating are provided.
CVSS v3.1
Score 5.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel's ethtool RSS implementation had a vulnerability where failure in the get_rxfh() function resulted in allocated memory for the indirection table and hash key not being released, causing a memory leak. This defect was addressed and fixed in the Linux kernel. No explicit affected versions or patch details are provided in the input data.
Potential Impact
This vulnerability leads to a memory leak in the kernel, which can degrade system stability or availability over time due to resource exhaustion. There is no impact on confidentiality or integrity. The CVSS vector indicates local attack complexity and privileges required, with no user interaction needed, and an impact limited to availability (medium severity).
Mitigation Recommendations
The vulnerability has been fixed in the Linux kernel. Users should apply the official Linux kernel updates that include this fix when available. Patch status is not explicitly confirmed in the input data; therefore, check the vendor or Linux kernel advisory for the current remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-9pm4-3wgp-cph8
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-63999"]
Threat ID: 6a5d27aa2a4a8d598912df1f
Added to database: 07/19/2026, 19:38:18 UTC
Last enriched: 10/08/2026, 22:42:38 UTC
Last updated: 10/17/2026, 06:48:19 UTC
Views: 100
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