CVE-2026-63999
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.
Affected versions
Linux kernel versions
5.15.181,
6.1.135,
6.6.88,
6.12.24,
6.13.12,
6.14.3,
6.15
and later are affected. Fixed in
6.18.35,
7.0.12,
7.1
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-63999?
CVE-2026-63999 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.15.181 onward and has been patched in 6.18.35, 7.0.12 and 7.1. CVE-2026-63999 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-63999?
Yes — CVE-2026-63999 has been patched. Fixed versions include 6.18.35, 7.0.12 and 7.1. If you are running Linux kernel 5.15.181 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-63999 actively exploited?
No — CVE-2026-63999 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.