llvm llvm-project up to 22.1.6 Bitcode File IntrinsicInst.cpp getBasePtr heap-based overflow

Summaryinfo

A vulnerability described as problematic has been identified in llvm llvm-project up to 22.1.6. Affected is the function GCRelocateInst::getBasePtr in the library llvm/lib/IR/IntrinsicInst.cpp of the component Bitcode File Handler. Such manipulation leads to heap-based overflow. This vulnerability is uniquely identified as CVE-2026-13574. Local access is required to approach this attack. Moreover, an exploit is present. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in llvm llvm-project up to 22.1.6. Affected by this issue is the function GCRelocateInst::getBasePtr in the library llvm/lib/IR/IntrinsicInst.cpp of the component Bitcode File Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is availability.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-13574. The exploitation is known to be easy. Local access is required to approach this attack. Technical details as well as a public exploit are known.

The exploit is available 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.

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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

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CPE 2.2info

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Exploitinginfo

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Entryinfo

Submitinfo

Accepted

• Submit #844468: LLVM LLVM Project commit 3b3a3c2 Heap-based Buffer Overflow (by TYGLS)

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