Linux Kernel up to 6.17.7 sctp sctp_diag_dump out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Linux Kernel up to 6.17.7. Affected by this vulnerability is the function sctp_diag_dump of the component sctp. Performing a manipulation results in out-of-bounds write. This vulnerability is reported as CVE-2025-40331. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.17.7. This affects the function sctp_diag_dump of the component sctp. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: sctp: Prevent TOCTOU out-of-bounds write For the following path not holding the sock lock, sctp_diag_dump() -> sctp_for_each_endpoint() -> sctp_ep_dump() make sure not to exceed bounds in case the address list has grown between buffer allocation (time-of-check) and write (time-of-use).

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2025-40331 since 04/16/2025. The exploitability is told to be easy. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/10/2025).

The vulnerability scanner Nessus provides a plugin with the ID 277835 (Linux Distros Unpatched Vulnerability : CVE-2025-40331), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.58 or 6.17.8 eliminates this vulnerability. Applying the patch b106a68df0650b694b254427cd9250c04500edd3/3006959371007fc2eae4a078f823c680fa52de1a/72e3fea68eac8d088e44c3dd954e843478e9240e/584307275b2048991b2e8984962189b6cc0a9b85/c9119f243d9c0da3c3b5f577a328de3e7ffd1b42/2fe08fcaacb7eb019fa9c81db39b2214de216677/89eac1e150dbd42963e13d23828cb8c4e0763196/95aef86ab231f047bb8085c70666059b58f53c09 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 vulnerability database at Tenable (277835). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
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: Out-of-bounds write
CWE: CWE-787 / CWE-119
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: 277835
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-40331

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.4.302/5.10.247/5.15.197/6.1.159/6.6.117/6.12.58/6.17.8
Patch: b106a68df0650b694b254427cd9250c04500edd3/3006959371007fc2eae4a078f823c680fa52de1a/72e3fea68eac8d088e44c3dd954e843478e9240e/584307275b2048991b2e8984962189b6cc0a9b85/c9119f243d9c0da3c3b5f577a328de3e7ffd1b42/2fe08fcaacb7eb019fa9c81db39b2214de216677/89eac1e150dbd42963e13d23828cb8c4e0763196/95aef86ab231f047bb8085c70666059b58f53c09

Timelineinfo

04/16/2025 CVE reserved
12/09/2025 +237 days Advisory disclosed
12/09/2025 +0 days VulDB entry created
12/10/2025 +1 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-40331 (🔒)
GCVE (CVE): GCVE-0-2025-40331
GCVE (VulDB): GCVE-100-334917

Entryinfo

Created: 12/09/2025 07:46
Updated: 12/10/2025 01:31
Changes: 12/09/2025 07:46 (59), 12/10/2025 01:31 (2)
Complete: 🔍
Cache ID: 216:ECE:103

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