SB20260816204 - Improper Check or Handling of Exceptional Conditions in Linux kernel s390 kvm

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260816204

SB20260816204 - Improper Check or Handling of Exceptional Conditions in Linux kernel s390 kvm

Published: August 16, 2026

Security Bulletin ID SB20260816204
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) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-74515)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

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 improper state validation in kvm_s390_pci_aif_enable() when handling repeated requests to enable adapter interrupt forwarding for the same zPCI device. A local user can issue the ioctl multiple times to cause a denial of service.

The issue can also overwrite and leak resources if the operation is invoked repeatedly for the same device.


Remediation

Install update from vendor's website.

References