Linux Kernel up to 6.17.2 return value

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Linux Kernel up to 6.17.2. This affects an unknown function. This manipulation causes return value. This vulnerability is handled as CVE-2025-40112. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.17.2 and classified as critical. Affected by this vulnerability is some unknown functionality. The manipulation with an unknown input leads to a return value vulnerability. The CWE definition for the vulnerability is CWE-252. The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: sparc: fix accurate exception reporting in copy_{from_to}_user for Niagara The referenced commit introduced exception handlers on user-space memory references in copy_from_user and copy_to_user. These handlers return from the respective function and calculate the remaining bytes left to copy using the current register contents. This commit fixes a couple of bad calculations and a broken epilogue in the exception handlers. This will prevent crashes and ensure correct return values of copy_from_user and copy_to_user in the faulting case. The behaviour of memcpy stays unchanged.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2025-40112 since 04/16/2025. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/07/2026).

The vulnerability scanner Nessus provides a plugin with the ID 276782 (Debian dla-4379 : linux-config-6.1 - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.301, 5.10.246, 5.15.195, 6.1.156, 6.6.112, 6.12.53, 6.17.3 or 6.18-rc1 eliminates this vulnerability. Applying the patch 05440320ea3e249d5f984918f2bf51210c1a7c03/7823fc4d8ab5e57f8db7806ff2530c03c166c4bb/37547d8e6eba87507279ee3dfddfd9dc46335454/a365ee556e45f780ee322b349a06efdad0c1458f/8cdeb5e482d3fdce7e825444b6ca3865e24c0228/a90ce516a73dbe087f9bf3dbf311301a58d125c6/088c5098ec6d6b0396edfbf3dad3e81de8469c1c/0b67c8fc10b13a9090340c5f8a37d308f4e1571c 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 (276782) and CERT Bund (WID-SEC-2025-2579). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel
  • RESF Rocky Linux

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: 5.3

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

CVSSv2info

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

Exploitinginfo

Class: Return value
CWE: CWE-252 / CWE-253
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 276782
Nessus Name: Debian dla-4379 : linux-config-6.1 - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.4.301/5.10.246/5.15.195/6.1.156/6.6.112/6.12.53/6.17.3/6.18-rc1
Patch: 05440320ea3e249d5f984918f2bf51210c1a7c03/7823fc4d8ab5e57f8db7806ff2530c03c166c4bb/37547d8e6eba87507279ee3dfddfd9dc46335454/a365ee556e45f780ee322b349a06efdad0c1458f/8cdeb5e482d3fdce7e825444b6ca3865e24c0228/a90ce516a73dbe087f9bf3dbf311301a58d125c6/088c5098ec6d6b0396edfbf3dad3e81de8469c1c/0b67c8fc10b13a9090340c5f8a37d308f4e1571c

Timelineinfo

04/16/2025 CVE reserved
11/12/2025 +210 days Advisory disclosed
11/12/2025 +0 days VulDB entry created
02/07/2026 +87 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-40112 (🔒)
GCVE (CVE): GCVE-0-2025-40112
GCVE (VulDB): GCVE-100-332131
CERT Bund: WID-SEC-2025-2579 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 11/12/2025 13:28
Updated: 02/07/2026 21:49
Changes: 11/12/2025 13:28 (57), 11/13/2025 06:21 (7), 11/25/2025 09:58 (1), 11/28/2025 21:00 (2), 12/17/2025 14:47 (1), 12/30/2025 13:38 (1), 02/07/2026 21:49 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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