CVE-2026-100503: Ghidra versions through 12.1.4 contain a heap use-after-free vulnerability in the decompiler's Funcdata::opIns

Q: How do I fix CVE-2026-100503?

ghidra: upgrade to newer than 12.1.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-100503 being exploited?

CVE-2026-100503 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-100503 affect?

CVE-2026-100503 affects ghidra. Severity is low (CVSS 3.3). Ghidra versions through 12.1.4 contain a heap use-after-free vulnerability in the decompiler's Funcdata::opInsertAfter function caused by stale INDIRECT effect-op references. Attackers can craft a malicious binary with a specific x86-64 seq

Q: How urgent is CVE-2026-100503?

Priority 12/100. No elevated risk signals yet.

Routine

LOW 3.3UPGRADE

CVE-2026-100503 is a low-severity flaw (CVSS 3.3) affecting ghidra. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Ghidra versions through 12.1.4 contain a heap use-after-free vulnerability in the decompiler's Funcdata::opInsertAfter function caused by stale INDIRECT effect-op references. Attackers can craft a malicious binary with a specific x86-64 sequence that triggers the vulnerability during decompilation, causing the decompile helper process to crash and denying service to analysts and automated analysis pipelines.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.3 (Low)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.1% (top 98%)
CISA exploited list	No
Weakness	CWE-416
Published	2026-09-26
Last modified	2026-10-08

Publisher (CNA): VulnCheck · Vendor: nsa

Last updated 2026-10-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-26 01:16 UTCPublished CVE record published
2026-10-08 16:43 UTCUpdated Record last modified

nsa ghidra UPGRADE

Affected: <= 12.1.4

Fixed in: newer than 12.1.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ghidra || rpm -q ghidra || ghidra --version

2. UPGRADE to newer than 12.1.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ghidra

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ghidra

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-100503?

ghidra: upgrade to newer than 12.1.4. Exact commands for each OS are on this page.

Is CVE-2026-100503 being exploited?

CVE-2026-100503 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-100503 affect?

CVE-2026-100503 affects ghidra. Severity is low (CVSS 3.3). Ghidra versions through 12.1.4 contain a heap use-after-free vulnerability in the decompiler's Funcdata::opInsertAfter function caused by stale INDIRECT effect-op references. Attackers can craft a malicious binary with a specific x86-64 seq

How urgent is CVE-2026-100503?

Priority 12/100. No elevated risk signals yet.

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CVE-2026-52756 MEDIUM 4.8 UPGRADE Ghidra before 12.2 contains an unauthenticated path traversal vulnerability in the IsfServer that accepts TCP
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References

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