CVE-2025-40331
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BaseFortify

Publication date: 2025-12-09

Last updated on: 2025-12-09

Assigner: kernel.org

Description
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).
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Meta Information
Published
2025-12-09
Last Modified
2025-12-09
Generated
2026-06-16
AI Q&A
2025-12-09
EPSS Evaluated
2026-06-14
NVD
CVE-2025-40331
EUVD
EUVD-2025-201871
Affected Vendors & Products
Currently, no data is known.
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is a Time-Of-Check to Time-Of-Use (TOCTOU) issue in the Linux kernel's SCTP (Stream Control Transmission Protocol) implementation. Specifically, it occurs when the address list grows between the time a buffer is allocated (time-of-check) and when data is written to it (time-of-use) in the sctp_diag_dump() -> sctp_for_each_endpoint() -> sctp_ep_dump() path without holding the socket lock. This can lead to an out-of-bounds write.

Impact Analysis

The vulnerability can lead to out-of-bounds memory writes, which may cause system instability, crashes, or potentially allow an attacker to execute arbitrary code or escalate privileges on the affected system.

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