SB20260816355 - Deadlock in Linux kernel proc
Published: August 16, 2026
Security Bulletin ID
SB20260816355
CSH 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 vulnerability.
1) Deadlock (CVE-ID: CVE-2026-72174)
CWE-ID: CWE-833 - Deadlock
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 a self-deadlock in pagemap_scan_pte_hole() when processing a PAGEMAP_SCAN ioctl with PM_SCAN_WP_MATCHING on a hugetlb VMA that reaches an unpopulated range. A local user can issue a crafted PAGEMAP_SCAN ioctl request to cause a denial of service.
The calling thread may hang in an unkillable state when the scan reaches an unpopulated part of the hugetlb range.
Remediation
Install update from vendor's website.