CVE-2026-49496

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

State: Published
Severity: 6.9 Medium
Published: Jun 10, 2026
Updated: Jul 14, 2026
Reserved: May 31, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N	VulnCheck
3.1	6.1 Medium	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H	VulnCheck

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
ghidranationalsecurityagency	before 12.1Affected 12.1Not affected

References

GitHub Security Advisory (GHSA-gqh9-2c72-wpjc)vendor-advisory
Patch Commitpatch
https://www.vulncheck.com/advisories/ghidra-heap-use-after-free-in-sleighbuilder-generatepointeradd-via-vector-reallocationthird-party-advisory

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