Ghidra through 12.1.4 Stack-based Buffer Overflow via leftshift128

Advisories

Ghidra through 12.1.4 Stack-based Buffer Overflow via leftshift128

severity: high
date: 9/25/2026
Affecting: ghidra <= 12.1.4
CVE: CVE-2026-100504
CWE: CWE-787 Out-of-bounds Write
CVSS: 7.3
CVSS V4 Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References: Patch Commit
https://github.com/NationalSecurityAgency/ghidra
https://github.com/NationalSecurityAgency/ghidra/blob/8b6bbb857accdfa20dc5b2f5dea471178c2e9fbc/Ghidra/Features/Decompiler/src/decompile/cpp/multiprecision.cc#L29-L61
https://github.com/NationalSecurityAgency/ghidra/blob/8b6bbb857accdfa20dc5b2f5dea471178c2e9fbc/Ghidra/Features/Decompiler/src/decompile/cpp/ruleaction.cc#L7848-L7878
Description: Ghidra versions through 12.1.4 contain a stack-based out-of-bounds write vulnerability in the decompiler's leftshift128 function when processing negative shift amounts from p-code. Attackers can craft malicious binaries with specific instruction sequences that trigger the overflow when decompiled, corrupting memory and potentially achieving code execution.

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