Linux Kernel up to 6.15-rc1 udmabuf size_limit_mb buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 6.15-rc1. This affects the function size_limit_mb of the component udmabuf. The manipulation results in buffer overflow. This vulnerability is known as CVE-2025-37803. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.15-rc1. Affected is the function size_limit_mb of the component udmabuf. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: udmabuf: fix a buf size overflow issue during udmabuf creation by casting size_limit_mb to u64 when calculate pglimit.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2025-37803 since 04/16/2025. The exploitability is told to be easy. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/14/2026).

The vulnerability scanner Nessus provides a plugin with the ID 237255 (Debian dla-4178 : ata-modules-5.10.0-34-armmp-di - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.293, 5.10.237, 5.15.181, 6.1.136, 6.6.89, 6.14.5 or 6.15-rc2 eliminates this vulnerability. Applying the patch e84a08fc7e25cdad5d9a3def42cc770ff711193f/13fe12c037b470321436deec393030c6153cfeb9/373512760e13fdaa726faa9502d0f5be2abb3d33/3f6c9d66e0f8eb9679b57913aa64b4d2266f6fbe/b2ff4e9c599b000833d16a917f519aa2e4a75de2/2b8419c6ecf69007dcff54ea0b9f0b215282c55a 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 (237255), EUVD (EUVD-2025-13992) and CERT Bund (WID-SEC-2025-0975). Once again VulDB remains the best source for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • 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: 7.9
VulDB Meta Temp Score: 7.7

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
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: 237255
Nessus Name: Debian dla-4178 : ata-modules-5.10.0-34-armmp-di - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.4.293/5.10.237/5.15.181/6.1.136/6.6.89/6.14.5/6.15-rc2
Patch: e84a08fc7e25cdad5d9a3def42cc770ff711193f/13fe12c037b470321436deec393030c6153cfeb9/373512760e13fdaa726faa9502d0f5be2abb3d33/3f6c9d66e0f8eb9679b57913aa64b4d2266f6fbe/b2ff4e9c599b000833d16a917f519aa2e4a75de2/2b8419c6ecf69007dcff54ea0b9f0b215282c55a

Timelineinfo

04/16/2025 🔍
05/08/2025 +22 days 🔍
05/08/2025 +0 days 🔍
03/14/2026 +309 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-37803 (🔍)
GCVE (CVE): GCVE-0-2025-37803
GCVE (VulDB): GCVE-100-307980
EUVD: 🔍
CERT Bund: WID-SEC-2025-0975 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 05/08/2025 09:00
Updated: 03/14/2026 00:08
Changes: 05/08/2025 09:00 (59), 05/27/2025 05:45 (2), 06/05/2025 19:51 (1), 09/08/2025 19:08 (7), 10/01/2025 18:17 (12), 10/12/2025 22:00 (1), 03/14/2026 00:08 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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