CVE-2025-21648

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

19/01/2025

Last modified:

03/11/2025

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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	4.7.1 (including)	5.10.234 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.177 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.125 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.72 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.10 (excluding)
cpe:2.3:o:linux:linux_kernel:4.7:-::::::
cpe:2.3:o:linux:linux_kernel:6.13:rc1::::::
cpe:2.3:o:linux:linux_kernel:6.13:rc2::::::
cpe:2.3:o:linux:linux_kernel:6.13:rc3::::::
cpe:2.3:o:linux:linux_kernel:6.13:rc4::::::
cpe:2.3:o:linux:linux_kernel:6.13:rc5::::::
cpe:2.3:o:linux:linux_kernel:6.13:rc6::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2025-21648

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools