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Vulnerabilities CVE-2025-21648

CVE-2025-21648

None
Open
TLP:CLEAR

netfilter: conntrack: clamp maximum hashtable size to INT_MAX

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Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: clamp maximum hashtable size to INT_MAX Use INT_MAX as maximum size for the conntrack hashtable. Otherwise, it is possible to hit WARN_ON_ONCE in __kvmalloc_node_noprof() when resizing hashtable because __GFP_NOWARN is unset. See: 0708a0afe291 ("mm: Consider __GFP_NOWARN flag for oversized kvmalloc() calls") Note: hashtable resize is only possible from init_netns.

Details

EPSS Score
0.22%

12th percentile

Confidence
90%
Published
Jan 19, 2025
Last Modified
Jul 14, 2026
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