CVE-2026-23302
Modified Modified - Updated After Analysis

Data Race Vulnerability in Linux Kernel Networking Components

Vulnerability report for CVE-2026-23302, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-03-25

Last updated on: 2026-07-04

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: net: annotate data-races around sk->sk_{data_ready,write_space} skmsg (and probably other layers) are changing these pointers while other cpus might read them concurrently. Add corresponding READ_ONCE()/WRITE_ONCE() annotations for UDP, TCP and AF_UNIX.

CVSS Scores

EPSS Scores

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Meta Information

Published
2026-03-25
Last Modified
2026-07-04
Generated
2026-07-06
AI Q&A
2026-03-25
EPSS Evaluated
2026-07-05
NVD
EUVD

Affected Vendors & Products

Showing 6 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 6.19 (inc) to 6.19.7 (exc)
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel From 6.13 (inc) to 6.18.17 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.82 (exc)
linux linux_kernel From 4.20 (inc) to 6.6.136 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-362 The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Attack-Flow Graph

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Executive Summary

This vulnerability in the Linux kernel involves data races around the sk->sk_{data_ready,write_space} pointers. Specifically, the skmsg layer and possibly other layers modify these pointers while other CPUs might read them concurrently without proper synchronization.

The issue was addressed by adding READ_ONCE()/WRITE_ONCE() annotations to ensure atomic access to these pointers for UDP, TCP, and AF_UNIX protocols, preventing concurrent read/write conflicts.

Impact Analysis

This vulnerability can lead to data races in the kernel networking stack, which may cause unpredictable behavior such as data corruption, kernel crashes, or system instability due to concurrent unsynchronized access to critical pointers.

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