CVE-2026-13573: Stack-based Buffer Overflow in llvm llvm-project
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 presence of this vulnerability remains uncertain at this time. The LLVM project explains, that the reported behavior is outside its documented security scope and therefore not considered a security vulnerability.
AI Analysis
Technical Summary
This vulnerability involves a stack-based buffer overflow in the llvm::StringMap::insert function of the ValueSymbolTable module in llvm-project versions up to 22.1.6. The issue requires local attacker privileges to exploit. Although an exploit has been publicly disclosed, the LLVM project does not recognize this as a security vulnerability since it falls outside their documented security scope. There is no official remediation or patch available at this time.
Potential Impact
The vulnerability could potentially allow a local attacker to cause a stack-based buffer overflow, which may lead to undefined behavior such as application crashes or memory corruption. However, the LLVM project does not consider this a security vulnerability, and no confirmed exploitation in the wild is reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the LLVM project does not consider this a security vulnerability, no official fix or mitigation is currently provided.
CVE-2026-13573: Stack-based Buffer Overflow in llvm llvm-project
Description
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 presence of this vulnerability remains uncertain at this time. The LLVM project explains, that the reported behavior is outside its documented security scope and therefore not considered a security vulnerability.
CVSS v4.0
Score 4.8medium
Affected software
pkg:github/llvm/llvm-projectcpe:2.3:a:llvm:llvm-project:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a stack-based buffer overflow in the llvm::StringMap::insert function of the ValueSymbolTable module in llvm-project versions up to 22.1.6. The issue requires local attacker privileges to exploit. Although an exploit has been publicly disclosed, the LLVM project does not recognize this as a security vulnerability since it falls outside their documented security scope. There is no official remediation or patch available at this time.
Potential Impact
The vulnerability could potentially allow a local attacker to cause a stack-based buffer overflow, which may lead to undefined behavior such as application crashes or memory corruption. However, the LLVM project does not consider this a security vulnerability, and no confirmed exploitation in the wild is reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the LLVM project does not consider this a security vulnerability, no official fix or mitigation is currently provided.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-06-28T18:47:36.926Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a42868627e9c7971906cddf
Added to database: 06/29/2026, 14:51:50 UTC
Last enriched: 07/08/2026, 10:49:56 UTC
Last updated: 08/13/2026, 18:06:47 UTC
Views: 68
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