A data race vulnerability in the Linux kernel's networking code involving concurrent access to sk->sk_{data_ready,write_space} pointers has been… (CVE-2026-23302)
A data race vulnerability in the Linux kernel's networking code involving concurrent access to sk->sk_{data_ready,write_space} pointers has been addressed. The issue arises because skmsg and potentially other layers modify these pointers while other CPUs may read them simultaneously without proper synchronization. The fix involved adding READ_ONCE()/WRITE_ONCE() annotations for UDP, TCP, and AF_UNIX to prevent data races.
AI Analysis
Technical Summary
The vulnerability concerns data races in the Linux kernel networking stack where sk->sk_{data_ready,write_space} pointers are concurrently accessed and modified by different CPUs without proper synchronization. This can lead to undefined behavior or kernel instability. The fix applied adds READ_ONCE()/WRITE_ONCE() annotations to ensure atomic access to these pointers in UDP, TCP, and AF_UNIX protocols, mitigating the race condition.
Potential Impact
The vulnerability does not affect confidentiality or integrity but can cause availability issues due to kernel instability or crashes (denial of service). There is no indication of exploitation in the wild. The attack vector requires local access with low privileges and high attack complexity, limiting exploitability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The vulnerability has been resolved in the Linux kernel by adding appropriate synchronization annotations. Users should monitor official Linux kernel advisories and apply updates when available.
A data race vulnerability in the Linux kernel's networking code involving concurrent access to sk->sk_{data_ready,write_space} pointers has been… (CVE-2026-23302)
Description
A data race vulnerability in the Linux kernel's networking code involving concurrent access to sk->sk_{data_ready,write_space} pointers has been addressed. The issue arises because skmsg and potentially other layers modify these pointers while other CPUs may read them simultaneously without proper synchronization. The fix involved adding READ_ONCE()/WRITE_ONCE() annotations for UDP, TCP, and AF_UNIX to prevent data races.
CVSS v3.1
Score 4.7medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability concerns data races in the Linux kernel networking stack where sk->sk_{data_ready,write_space} pointers are concurrently accessed and modified by different CPUs without proper synchronization. This can lead to undefined behavior or kernel instability. The fix applied adds READ_ONCE()/WRITE_ONCE() annotations to ensure atomic access to these pointers in UDP, TCP, and AF_UNIX protocols, mitigating the race condition.
Potential Impact
The vulnerability does not affect confidentiality or integrity but can cause availability issues due to kernel instability or crashes (denial of service). There is no indication of exploitation in the wild. The attack vector requires local access with low privileges and high attack complexity, limiting exploitability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The vulnerability has been resolved in the Linux kernel by adding appropriate synchronization annotations. Users should monitor official Linux kernel advisories and apply updates when available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-g352-h749-hp67
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-23302"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a498a7827e9c7971936eff3
Added to database: 07/04/2026, 22:34:32 UTC
Last enriched: 07/04/2026, 23:07:10 UTC
Last updated: 07/31/2026, 19:24:47 UTC
Views: 17
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