CVE-2026-63999
ethtool: rss: fix indir_table and hkey leak on get_rxfh failure
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.
INFO
Published Date :
July 19, 2026, 4:17 p.m.
Last Modified :
July 30, 2026, 2:51 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Ensure memory buffers are freed on get_rxfh errors.
- Update the Linux kernel to the latest secure version.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-63999.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-63999 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-63999
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-63999 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-63999 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 19, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4f038a6a02d20859a3479293cbf172b0f14cbdd6', 'lessThan': '33d05c22d6f227c5ae171c46df2f6f8bf48047ea', 'versionType': 'git'}, {'status': 'affected', 'version': '4f038a6a02d20859a3479293cbf172b0f14cbdd6', 'lessThan': '80d95d92f828cfcace955d673637d944178b435f', 'versionType': 'git'}, {'status': 'affected', 'version': '4f038a6a02d20859a3479293cbf172b0f14cbdd6', 'lessThan': '266297692f97008ca48bc311775c087c59bd7fe3', 'versionType': 'git'}, {'status': 'affected', 'version': '81a5174e64ce4fb7b7a2f6499b835c904c9451ee', 'versionType': 'git'}, {'status': 'affected', 'version': 'ec9faff49a4ea27731de39cb887b7e590e93157b', 'versionType': 'git'}, {'status': 'affected', 'version': 'c5ed0eaddcbda56079091fc3876b140a6e70a548', 'versionType': 'git'}, {'status': 'affected', 'version': 'a065b996052656a65afc51ad82336dc55ae4c72f', 'versionType': 'git'}, {'status': 'affected', 'version': 'adee9db710a6117b978a25ed4153846b7c56ec9a', 'versionType': 'git'}, {'status': 'affected', 'version': '5eb3fdc4b6281b29e830300c866a36d90442b1f0', 'versionType': 'git'}, {'status': 'affected', 'version': '5.15.181', 'lessThan': '5.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.135', 'lessThan': '6.2', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.88', 'lessThan': '6.7', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.24', 'lessThan': '6.13', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.13.12', 'lessThan': '6.14', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.14.3', 'lessThan': '6.15', 'versionType': 'semver'}], 'programFiles': ['net/ethtool/rss.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.35', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.12', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/ethtool/rss.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/266297692f97008ca48bc311775c087c59bd7fe3 Added Reference https://git.kernel.org/stable/c/33d05c22d6f227c5ae171c46df2f6f8bf48047ea Added Reference https://git.kernel.org/stable/c/80d95d92f828cfcace955d673637d944178b435f