CVE-2026-98130

HIGH

MEDIUM Priority: 0.04 BB Relevance: 66/100

Published: 2026-09-25 Modified: 2026-10-22 First seen: 2026-10-29 Status: active

Attack Surface

Network No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network

AC: High

PR: None

UI: None

S: Unchanged

C: High

I: High

A: High

Description

In the Linux kernel, the following vulnerability has been resolved: sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START The SCTP_CMD_TIMER_START handler checks timer_pending() before calling timer_reduce(). The timer can expire and detach between these operations, causing timer_reduce() to rearm the timer without taking the association reference required for the newly armed timer. The timer callback later unconditionally drops its association reference, which can leave the association reference count unbalanced and result in use-after-free during association teardown. Use the return value of timer_reduce() to determine whether the timer was actually armed. Take the association reference only when timer_reduce() successfully starts a new timer, closing the race between checking the timer state and rearming it. This issue was reported by Nico Yip (@_cyeaa_) working with TrendAI Zero Day Initiative.

Weakness Classification (1)

CWE-362

Affected Software (13)

Vendor	Product	Version
linux	linux_kernel	4.19.126 – 4.20
linux	linux_kernel	5.4.44 – 5.5
linux	linux_kernel	5.6.16 – 5.7
linux	linux_kernel	5.7.1 – 5.10.271
linux	linux_kernel	5.11 – 5.15.222
linux	linux_kernel	5.16 – 6.1.189
linux	linux_kernel	6.2 – 6.6.158
linux	linux_kernel	6.7 – 6.12.111
linux	linux_kernel	6.13 – 6.18.53
linux	linux_kernel	6.19 – 7.2.7
linux	linux_kernel	5.7
linux	linux_kernel	5.7
linux	linux_kernel	7.3