Linux Kernel up to 6.17.3 sctp comparison

CVSS Meta Temp Score
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CTI Interest Score
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2.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.17.3. It has been declared as problematic. This affects an unknown part of the component sctp. The manipulation results in comparison. This vulnerability was named CVE-2025-40204. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.17.3. It has been classified as problematic. Affected is some unknown processing of the component sctp. The manipulation with an unknown input leads to a comparison vulnerability. CWE is classifying the issue as CWE-697. The product compares two entities in a security-relevant context, but the comparison is incorrect, which may lead to resultant weaknesses. This is going to have an impact on confidentiality. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: sctp: Fix MAC comparison to be constant-time To prevent timing attacks, MACs need to be compared in constant time. Use the appropriate helper function for this.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2025-40204 since 04/16/2025. The exploitability is told to be difficult. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 02/07/2026).

The vulnerability scanner Nessus provides a plugin with the ID 275366 (Linux Distros Unpatched Vulnerability : CVE-2025-40204), 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, 6.1.157, 6.6.113, 6.12.54, 6.17.4 or 6.18-rc1 eliminates this vulnerability. Applying the patch b93fa8dc521d00d2d44bf034fb90e0d79b036617/0e8b8c326c2a6de4d837b1bb034ea704f4690d77/1cd60e0d0fb8f0e62ec4499138afce6342dc9d4c/9c05d44ec24126fc283835b68f82dba3ae985209/ed3044b9c810c5c24eb2830053fbfe5fd134c5d4/8019b3699289fce3f10b63f98601db97b8d105b0/0b32ff285ff6f6f1ac1d9495787ccce8837d6405/dd91c79e4f58fbe2898dac84858033700e0e99fb 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 (275366) and CERT Bund (WID-SEC-2025-2595). Once again VulDB remains the best source for vulnerability data.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise 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: 2.6
VulDB Meta Temp Score: 2.5

VulDB Base Score: 2.6
VulDB Temp Score: 2.5
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: Comparison
CWE: CWE-697
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: 275366
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-40204

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.4.301/5.10.246/5.15.195/6.1.157/6.6.113/6.12.54/6.17.4/6.18-rc1
Patch: b93fa8dc521d00d2d44bf034fb90e0d79b036617/0e8b8c326c2a6de4d837b1bb034ea704f4690d77/1cd60e0d0fb8f0e62ec4499138afce6342dc9d4c/9c05d44ec24126fc283835b68f82dba3ae985209/ed3044b9c810c5c24eb2830053fbfe5fd134c5d4/8019b3699289fce3f10b63f98601db97b8d105b0/0b32ff285ff6f6f1ac1d9495787ccce8837d6405/dd91c79e4f58fbe2898dac84858033700e0e99fb

Timelineinfo

04/16/2025 CVE reserved
11/13/2025 +211 days Advisory disclosed
11/13/2025 +0 days VulDB entry created
02/07/2026 +86 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-40204 (🔒)
GCVE (CVE): GCVE-0-2025-40204
GCVE (VulDB): GCVE-100-332268
CERT Bund: WID-SEC-2025-2595 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 11/13/2025 07:32
Updated: 02/07/2026 20:37
Changes: 11/13/2025 07:32 (58), 11/13/2025 19:32 (2), 11/14/2025 05:27 (7), 12/01/2025 15:29 (1), 12/21/2025 22:01 (1), 02/07/2026 20:37 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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