Buffer overflow in Llvm Llvm-Project
CVE-2026-13574
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.002 (6.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 6.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Llvm Llvm-Project — versions 22.1.0, 22.1.1, 22.1.2
Weakness classification (CWE)
References
- vuldb.com/vuln/374582 (technical-description, vdb-entry)
- vuldb.com/vuln/374582/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-13574 (third-party-advisory)
- vuldb.com/submit/844468 (third-party-advisory)
- github.com/llvm/llvm-project/issues/199191 (issue-tracking)
- github.com/user-attachments/files/28142619/poc.zip (exploit, broken-link)
- github.com/llvm/llvm-project/ (product)
Frequently asked questions
- What is CVE-2026-13574?
- CVE-2026-13574 is a low-severity vulnerability in Llvm Llvm-Project, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 3.3/10. Published 2026-06-29.
- How severe is CVE-2026-13574?
- Low severity. CVSS v3 base score is 3.3 out of 10.