SB2026050224 - Improper Check or Handling of Exceptional Conditions in Linux kernel hv driver
Published: May 2, 2026
Security Bulletin ID
SB2026050224
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-43045)
CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause memory corruption.
The vulnerability exists due to improper handling of short pin counts and partial batch accounting in mshv_region_pin when pinning user pages. A local user can trigger the use of partially pinned regions to cause memory corruption.
Remediation
Install update from vendor's website.