SB20260507116 - Improper resource shutdown or release in Linux kernel io_uring
Published: May 7, 2026
Security Bulletin ID
SB20260507116
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper resource shutdown or release (CVE-ID: CVE-2026-43224)
CWE-ID: CWE-404 - Improper Resource Shutdown or Release
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper resource shutdown or release in io_zcrx_map_area() when handling DMA mapping failures. A local user can trigger a mapping failure that leaves an initialized scatter-gather table unfreed to cause a denial of service.
This can occur only on PAGE_POOL_32BIT_ARCH_WITH_64BIT_DMA systems.
Remediation
Install update from vendor's website.