SB20260816524 - Out-of-bounds read in Linux kernel kernel diag
Published: August 16, 2026
Security Bulletin ID
SB20260816524
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2026-72011)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in memtop_get_page_count() when using a user-controlled level value to access the memtop_pages array. A local user can supply a crafted level value to disclose sensitive information.
The issue involves speculative execution on s390 systems.
Remediation
Install update from vendor's website.