SB20261023195 - Deadlock in Linux kernel inline_crypto ch_ktls driver

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Main Vulnerability Database SB20261023195

SB20261023195 - Deadlock in Linux kernel inline_crypto ch_ktls driver

Published: October 23, 2026

Security Bulletin ID SB20261023195
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) Deadlock (CVE-ID: CVE-2026-98967)

CWE-ID: CWE-833 - Deadlock

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/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 through a kernel deadlock.

The vulnerability exists due to improper locking in the Chelsio ch_ktls driver's chcr_ktls_dev_del() function and chcr_ktls_dev_add() error path when erasing entries from tid_list with softirqs enabled. A local user can trigger connection cleanup concurrent with receive processing for another connection on the same adapter and CPU to cause a receive softirq to spin on the XArray lock held by the interrupted task, resulting in a deadlock and denial of service.


Remediation

Install update from vendor's website.

References