llvm llvm-project up to 22.1.6 ValueSymbolTable ValueSymbolTable.cpp llvm::StringMap::insert stack-based overflow

Summaryinfo

A vulnerability marked as problematic has been reported in llvm llvm-project up to 22.1.6. This impacts the function llvm::StringMap::insert in the library /lib/IR/ValueSymbolTable.cpp of the component ValueSymbolTable Module. This manipulation causes stack-based overflow. This vulnerability is handled as CVE-2026-13573. It is possible to launch the attack on the local host. Additionally, an exploit exists. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability classified as problematic was found in llvm llvm-project up to 22.1.6. Affected by this vulnerability is the function llvm::StringMap::insert in the library /lib/IR/ValueSymbolTable.cpp of the component ValueSymbolTable Module. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect availability.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-13573. The exploitation appears to be easy. An attack has to be approached locally. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept. The project was informed of the problem early through an issue report but has not responded yet.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Project Management Software

Vendor

• llvm

Name

• llvm-project

Version

• 22.1.0
• 22.1.1
• 22.1.2
• 22.1.3
• 22.1.4
• 22.1.5
• 22.1.6

Website

• Product: https://github.com/llvm/llvm-project/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Submitinfo

Accepted

• Submit #844457: LLVM LLVM Project commit 3b3a3c2 Stack-based Buffer Overflow (by TYGLS)

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion