Linux Kernel up to 6.12.36/6.15.5 show_numa_info allocation of resources

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4.5$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.12.36/6.15.5 and classified as problematic. Impacted is the function show_numa_info. The manipulation leads to allocation of resources. This vulnerability is listed as CVE-2025-38383. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.12.36/6.15.5. It has been rated as problematic. This issue affects the function show_numa_info. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: mm/vmalloc: fix data race in show_numa_info() The following data-race was found in show_numa_info(): ================================================================== BUG: KCSAN: data-race in vmalloc_info_show / vmalloc_info_show read to 0xffff88800971fe30 of 4 bytes by task 8289 on cpu 0: show_numa_info mm/vmalloc.c:4936 [inline] vmalloc_info_show+0x5a8/0x7e0 mm/vmalloc.c:5016 seq_read_iter+0x373/0xb40 fs/seq_file.c:230 proc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299 .... write to 0xffff88800971fe30 of 4 bytes by task 8287 on cpu 1: show_numa_info mm/vmalloc.c:4934 [inline] vmalloc_info_show+0x38f/0x7e0 mm/vmalloc.c:5016 seq_read_iter+0x373/0xb40 fs/seq_file.c:230 proc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299 .... value changed: 0x0000008f -> 0x00000000 ================================================================== According to this report,there is a read/write data-race because m->private is accessible to multiple CPUs. To fix this, instead of allocating the heap in proc_vmalloc_init() and passing the heap address to m->private, vmalloc_info_show() should allocate the heap.

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2025-38383 since 04/16/2025. The exploitation is known to be difficult. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 271193 (Ubuntu 24.04 LTS / 25.04 : Linux kernel (Azure) vulnerabilities (USN-7834-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.37, 6.15.6 or 6.16-rc1 eliminates this vulnerability. Applying the patch ead91de35d9cd5c4f80ec51e6020f342079170af/5c966f447a584ece3c70395898231aeb56256ee7/5c5f0468d172ddec2e333d738d2a1f85402cf0bc 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 (271193) and CERT Bund (WID-SEC-2025-1653). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • IBM QRadar SIEM
  • SUSE openSUSE
  • RESF Rocky Linux
  • Dell Avamar
  • Open Source Linux Kernel
  • Dell NetWorker
  • Dell Secure Connect Gateway

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
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: 271193
Nessus Name: Ubuntu 24.04 LTS / 25.04 : Linux kernel (Azure) vulnerabilities (USN-7834-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.12.37/6.15.6/6.16-rc1
Patch: ead91de35d9cd5c4f80ec51e6020f342079170af/5c966f447a584ece3c70395898231aeb56256ee7/5c5f0468d172ddec2e333d738d2a1f85402cf0bc

Timelineinfo

04/16/2025 CVE reserved
07/25/2025 +100 days Advisory disclosed
07/25/2025 +0 days VulDB entry created
01/03/2026 +162 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-38383 (🔒)
GCVE (CVE): GCVE-0-2025-38383
GCVE (VulDB): GCVE-100-317663
CERT Bund: WID-SEC-2025-1653 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 07/25/2025 15:43
Updated: 01/03/2026 16:16
Changes: 07/25/2025 15:43 (57), 08/19/2025 20:53 (7), 09/14/2025 15:44 (1), 09/15/2025 18:59 (1), 09/28/2025 19:06 (1), 10/26/2025 02:28 (2), 11/02/2025 07:12 (1), 11/17/2025 00:46 (1), 11/20/2025 01:54 (11), 01/03/2026 16:16 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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