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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.

PUBLISHED Reserved 2026-06-28 | Published 2026-06-29 | Updated 2026-07-07 | Assigner VulDB




MEDIUM: 4.8CVSS: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
LOW: 3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
LOW: 3.3CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
1.7AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR

Problem types

Heap-based Buffer Overflow

Memory Corruption

Product status

22.1.0
affected

22.1.1
affected

22.1.2
affected

22.1.3
affected

22.1.4
affected

22.1.5
affected

22.1.6
affected

Timeline

2026-06-28:Advisory disclosed
2026-06-28:VulDB entry created
2026-07-07:VulDB entry last update

Credits

TYGLS (VulDB User) reporter

VulDB CNA Team coordinator

References

github.com/llvm/llvm-project/issues/199191 exploit

vuldb.com/vuln/374582 (VDB-374582 | llvm llvm-project Bitcode File IntrinsicInst.cpp getBasePtr heap-based overflow) vdb-entry technical-description

vuldb.com/vuln/374582/cti (VDB-374582 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/cve/CVE-2026-13574 (CVE-2026-13574 | CVE Analysis and Report) third-party-advisory

vuldb.com/submit/844468 (Submit #844468 | LLVM LLVM Project commit 3b3a3c2 Heap-based Buffer Overflow) third-party-advisory

github.com/llvm/llvm-project/issues/199191 issue-tracking

github.com/user-attachments/files/28142619/poc.zip broken-link exploit

github.com/llvm/llvm-project/ product

cve.org (CVE-2026-13574)

nvd.nist.gov (CVE-2026-13574)

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