SB20260824116 - Race condition in Linux kernel packet

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Main Vulnerability Database SB20260824116

SB20260824116 - Race condition in Linux kernel packet

Published: August 24, 2026

Security Bulletin ID SB20260824116
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: CVE-2026-74666)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a race condition in packet_set_ring() and pressure clearing logic in af_packet when reconfiguring the ring while packet_poll() or packet_recvmsg() accesses receive state. A local user can reconfigure the packet socket ring and trigger packet polling or receive operations to cause a denial of service.

The issue can cause __packet_rcv_has_room() to dereference stale or NULL ring storage.


Remediation

Install update from vendor's website.

References