Bug 2495147

Summary: CVE-2026-13573 clang17: llvm: Denial of Service via stack-based buffer overflow in StringMap::insert [fedora-all]
Product: [Fedora] Fedora Reporter: Jon Moroney <jmoroney>
Component: clang17Assignee: Orphan Owner <extras-orphan>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: rawhideCC: extras-orphan
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["959a7ae3-284c-412b-89cd-dea87009b8c8"]}
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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: 2494424    

Description Jon Moroney 2026-06-30 19:48:13 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.

A vulnerability was found in llvm llvm-project up to 22.1.6. This affects the function llvm::StringMap::insert in the library /lib/IR/ValueSymbolTable.cpp of the component ValueSymbolTable Module. The manipulation results in stack-based buffer overflow. Attacking locally is a requirement. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.