SB20250916219 - Improper locking in Linux kernel vfio driver
Published: September 16, 2025 Updated: September 22, 2025
Security Bulletin ID
SB20250916219
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper locking (CVE-ID: CVE-2023-53171)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the vfio_lock_acct(), vfio_pin_page_external(), vfio_remove_dma(), vfio_dma_do_map() and vfio_iommu_type1_dma_rw_chunk() functions in drivers/vfio/vfio_iommu_type1.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/046eca5018f8a5dd1dc2cedf87fb5843b9ea3026
- https://git.kernel.org/stable/c/5a271242716846cc016736fb76be2b40ee49b0c3
- https://git.kernel.org/stable/c/a6b2aabe664098d5cf877ae0fd96459464a30e17
- https://git.kernel.org/stable/c/b0790dff0760b7734cf0961f497ad64628ca550b
- https://git.kernel.org/stable/c/eafb81c50da899dd80b340c841277acc4a1945b7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.99