CVE-2025-21648

MEDIUM

Linux Kernel 4.7.1-6.12.9 - DoS via Conntrack Hashtable Resize

Title source: llm
STIX 2.1

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.

References (10)

Core 10
Core References

Scores

CVSS v3 5.5
EPSS 0.0022
EPSS Percentile 11.9%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (22)
linux/Kernel 4.7.0 - 5.10.234linux
linux/Kernel 5.11.0 - 5.15.177linux
linux/Kernel 5.16.0 - 6.1.125linux
linux/Kernel 6.2.0 - 6.6.72linux
linux/Kernel 6.7.0 - 6.12.10linux
Linux/Linux < 4.7
Linux/Linux 4.7
Linux/Linux 5.10.234 - 5.10.*
Linux/Linux 5.15.177 - 5.15.*
Linux/Linux 6.1.125 - 6.1.*
... and 12 more
Published Jan 19, 2025
Tracked Since Feb 18, 2026