What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-06-10 · updated 2026-10-26
• Weakness: CWE-416

Description

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 products

• nationalsecurityagency ghidra: before 12.1 — fixed in 12.1

How to fix

Upgrade to a fixed version: nationalsecurityagency ghidra 12.1. Check the vendor advisory for mitigations.

References

• https://github.com/NationalSecurityAgency/ghidra/commit/8a3018d5efcb07d2ec40bacdd6063cb6f01c8edf
• https://github.com/NationalSecurityAgency/ghidra/security/advisories/GHSA-gqh9-2c72-wpjc
• https://www.vulncheck.com/advisories/ghidra-heap-use-after-free-in-sleighbuilder-generatepointeradd-via-vector-reallocation
• https://github.com/NationalSecurityAgency/ghidra/security/advisories/GHSA-gqh9-2c72-wpjc

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