SB2026100772 - Race condition in Linux kernel ipv6

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Main Vulnerability Database SB2026100772

SB2026100772 - Race condition in Linux kernel ipv6

Published: October 7, 2026

Security Bulletin ID SB2026100772
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: CVE-2026-98300)

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

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to trigger a kernel warning.

The vulnerability exists due to a race condition in tcp_v6_do_rcv() when processing incoming IPv6 TCP packets concurrently with closure of a listening socket. A local user can close a listening socket during the race window between tcp_v6_rcv() and tcp_v6_do_rcv() to trigger a kernel warning.

The affected path requires IPv6 receive options to be enabled through np->rxopt.all.


Remediation

Install update from vendor's website.

References