CVE-2026-63999 Details
Description
In the Linux kernel, the following vulnerability has been resolved: ethtool: rss: fix indir_table and hkey leak on get_rxfh failure rss_prepare_get() allocates the indirection table and hash key buffer via rss_get_data_alloc(), then calls ops->get_rxfh() to populate them. If get_rxfh() fails, the function returns an error without freeing the allocation.
A vulnerability in the Linux kernel's ethtool component allows for a memory leak of the indirection table and hash key. This issue arises in the RSS (Receive Side Scaling) handling, specifically within the 'rss_prepare_get' function. The vulnerability is present in the stable branch of the Linux kernel. When 'rss_prepare_get' allocates the indirection table and hash key buffer, it relies on the 'rss_get_data_alloc' function. After allocation, it calls 'ops->get_rxfh()' to populate the data. However, if 'get_rxfh()' fails, the function returns an error without freeing the previously allocated memory, leading to a resource leak.
Users can apply the latest patches available in the Linux kernel stable tree to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No CVSS 3.x data is available for this CVE.
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
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Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
No affected product data is available for this CVE.
Change History
1 change record found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 19, 2026 | New CVE Received | kernel.org |