Bug 2554094

Summary: CVE-2026-85745 mariadb10.11: mariadb: out-of-bounds read in ST_Area with crafted MULTIPOLYGON [fedora-all]
Product: [Fedora] Fedora Reporter: Laura Pardo <lpardo>
Component: mariadb10.11Assignee: Michal Schorm <mschorm>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: db-sig, mschorm, psloboda
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["659eef0e-7107-4107-9f4a-258298c16914"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2553280    

Description Laura Pardo 2026-10-16 12:53:51 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

An out-of-bounds read vulnerability was found in MariaDB's ST_Area function. An authenticated, low-privileged SQL user can trigger the flaw by supplying a crafted MULTIPOLYGON geometry, which allows reading beyond allocated heap memory. This can reportedly disclose heap contents and executable base addresses, enabling ASLR bypass. When chained with a separate use-after-free vulnerability, this information disclosure can facilitate privilege escalation to operating-system command execution.

The researcher reports successful exploitation against MariaDB 13.0.1-rc with ASLR, PIE, and Full RELRO enabled.

Reference: https://hackerone.com/reports/3856148