BaseFortify

Publication date: 2025-12-16

Last updated on: 2025-12-18

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check() Use RCU to avoid a pair of atomic operations and a potential UAF on dst_dev()->flags.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-12-16

Last Modified

2025-12-18

Generated

2026-07-06

AI Q&A

2025-12-16

EPSS Evaluated

2026-07-05

NVD

CVE-2025-68188

Affected Vendors & Products

Currently, no data is known.

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability in the Linux kernel involves the tcp_fastopen_active_disable_ofo_check() function, where the code did not use RCU (Read-Copy-Update) properly, leading to a potential use-after-free (UAF) condition on the flags of dst_dev(). The fix involved using dst_dev_rcu() to avoid unsafe atomic operations and prevent the UAF.

Impact Analysis

The vulnerability could lead to a use-after-free condition in the Linux kernel's TCP implementation, which may cause system instability, crashes, or potentially allow an attacker to execute arbitrary code or cause denial of service.

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