CVE-2026-13574
llvm llvm-project Bitcode File IntrinsicInst.cpp getBasePtr heap-based overflow
- State
- Published
- Severity
- 4.8 Medium
- Published
- Jun 29, 2026
- Updated
- Jul 7, 2026
- Reserved
- Jun 28, 2026
Description
A vulnerability was determined in llvm llvm-project up to 22.1.6. This impacts the function GCRelocateInst::getBasePtr in the library llvm/lib/IR/IntrinsicInst.cpp of the component Bitcode File Handler. This manipulation causes heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. There are still doubts about whether this vulnerability truly exists. The LLVM project explains, that the reported behavior is outside its documented security scope and therefore not considered a security vulnerability.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 4.8 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 3.3 Low | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R | VulDB |
| 3.0 | 3.3 Low | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 1.7 Low | AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
llvm-projectllvm |
|
References
- VDB-374582 | llvm llvm-project Bitcode File IntrinsicInst.cpp getBasePtr heap-based overflowvdb-entrytechnical-description
- VDB-374582 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-13574 | CVE Analysis and Reportthird-party-advisory
- Submit #844468 | LLVM LLVM Project commit 3b3a3c2 Heap-based Buffer Overflowthird-party-advisory
- https://github.com/llvm/llvm-project/issues/199191issue-tracking
- https://github.com/user-attachments/files/28142619/poc.zipbroken-linkexploit
- https://github.com/llvm/llvm-project/product
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.