CVE-2025-21648

Published: January 21, 2025Last modified: January 21, 2025

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.

Status

References

• https://git.kernel.org/stable/c/5552b4fd44be3393b930434a7845d8d95a2a3c33
• https://git.kernel.org/stable/c/a965f7f0ea3ae61b9165bed619d5d6da02c75f80
• https://git.kernel.org/stable/c/b1b2353d768f1b80cd7fe045a70adee576b9b338
• https://git.kernel.org/stable/c/b541ba7d1f5a5b7b3e2e22dc9e40e18a7d6dbc13
• https://git.kernel.org/stable/c/d5807dd1328bbc86e059c5de80d1bbee9d58ca3d
• https://git.kernel.org/stable/c/f559357d035877b9d0dcd273e0ff83e18e1d46aa