CVE-2025-21648

Advisory lineage Upstream: 0 Downstream: 46
Modified
Published: 19 Jan 2025, 10:18
Last modified:14 Jul 2026, 12:39

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.21% LOW
0% probability +0.14%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

19 Jan 2025, 10:18
Published
Vulnerability first disclosed
14 Jul 2026, 12:39
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.21%• Percentile: 11%

Affected Systems

  • linux•linux

    ≥ 9cc1c73ad66610bffc80b691136ffc1e9a3b1a58, < a965f7f0ea3ae61b9165bed619d5d6da02c75f80 | ≥ 9cc1c73ad66610bffc80b691136ffc1e9a3b1a58, < b1b2353d768f1b80cd7fe045a70adee576b9b338 | ≥ 9cc1c73ad66610bffc80b691136ffc1e9a3b1a58, < 5552b4fd44be3393b930434a7845d8d95a2a3c33 | ≥ 9cc1c73ad66610bffc80b691136ffc1e9a3b1a58, < d5807dd1328bbc86e059c5de80d1bbee9d58ca3d | ≥ 9cc1c73ad66610bffc80b691136ffc1e9a3b1a58, < f559357d035877b9d0dcd273e0ff83e18e1d46aa | ≥ 9cc1c73ad66610bffc80b691136ffc1e9a3b1a58, < b541ba7d1f5a5b7b3e2e22dc9e40e18a7d6dbc13 | 4.7

  • linux•linux kernel

    ≥ 4.7.1, < 5.10.234 | ≥ 5.11, < 5.15.177 | ≥ 5.16, < 6.1.125 | ≥ 6.2, < 6.6.72 | ≥ 6.7, < 6.12.10 | 4.7 | 6.13:rc1 | 6.13:rc2 | 6.13:rc3 | 6.13:rc4 | 6.13:rc5 | 6.13:rc6

References (10)