Ghidra < 12.1 - Heap-Use-After-Free in SleighBuilder::generatePointerAdd via Vector Reallocation
CVE-2026-49496

6.9MEDIUM

Key Information:

Vendor

Nationalsecurityagency

Status
Ghidra
Vendor
CVE Published:
10 June 2026

What is CVE-2026-49496?

Ghidra before 12.1 contains a heap-use-after-free vulnerability in SleighBuilder::generatePointerAdd caused by iterator invalidation when PcodeCacher::allocateInstruction reallocates the issued vector. Attackers can trigger memory corruption by decompiling malicious binaries through the public Sleigh::oneInstruction C++ API, affecting downstream SLEIGH library consumers.

Affected Version(s)

ghidra 0 < 12.1

ghidra 12.1

References

https://github.com/NationalSecurityAgency/ghidra/security...
vendor-advisory
https://github.com/NationalSecurityAgency/ghidra/commit/8...
patch
https://www.vulncheck.com/advisories/ghidra-heap-use-afte...
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Stefano Bonicatti (@Smjert)
.