Linux Kernel up to 6.1.124/6.6.71/6.12.9/6.13-rc6 __kvmalloc_node_noprof privilege escalation

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.1.124/6.6.71/6.12.9/6.13-rc6. It has been rated as problematic. This impacts the function __kvmalloc_node_noprof. The manipulation leads to an unknown weakness. This vulnerability is referenced as CVE-2025-21648. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 6.1.124/6.6.71/6.12.9/6.13-rc6. The impact remains unknown. The summary by CVE is:

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.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2025-21648 since 12/29/2024. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 215144 (Debian dsa-5860 : affs-modules-6.1.0-21-4kc-malta-di - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.125, 6.6.72, 6.12.10 or 6.13-rc7 eliminates this vulnerability. Applying the patch 5552b4fd44be3393b930434a7845d8d95a2a3c33/d5807dd1328bbc86e059c5de80d1bbee9d58ca3d/f559357d035877b9d0dcd273e0ff83e18e1d46aa/b541ba7d1f5a5b7b3e2e22dc9e40e18a7d6dbc13 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (215144), EUVD (EUVD-2025-2597) and CERT Bund (WID-SEC-2025-0119). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • Dell NetWorker
  • Dell Avamar
  • Dell PowerProtect Data Domain
  • Open Source Linux Kernel

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 215144
Nessus Name: Debian dsa-5860 : affs-modules-6.1.0-21-4kc-malta-di - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.1.125/6.6.72/6.12.10/6.13-rc7
Patch: 5552b4fd44be3393b930434a7845d8d95a2a3c33/d5807dd1328bbc86e059c5de80d1bbee9d58ca3d/f559357d035877b9d0dcd273e0ff83e18e1d46aa/b541ba7d1f5a5b7b3e2e22dc9e40e18a7d6dbc13

Timelineinfo

12/29/2024 🔍
01/19/2025 +21 days 🔍
01/19/2025 +0 days 🔍
10/17/2025 +270 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-21648 (🔍)
GCVE (CVE): GCVE-0-2025-21648
GCVE (VulDB): GCVE-100-292565
EUVD: 🔍
CERT Bund: WID-SEC-2025-0119 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 01/19/2025 13:22
Updated: 10/17/2025 00:28
Changes: 01/19/2025 13:22 (56), 02/02/2025 12:43 (1), 02/09/2025 01:17 (2), 08/04/2025 03:54 (7), 10/13/2025 18:12 (1), 10/16/2025 21:39 (10), 10/17/2025 00:28 (1)
Complete: 🔍
Cache ID: 216::103

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