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Not in CISA KEV
MEDIUM severity

CVE-2022-40922 — lief

MEDIUMFix: lief-project/LIEF@ad81191

CVE-2022-40922 is a medium-severity (CVSS 6.5) vulnerability in lief. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for lief — see the affected versions and patch details below.

LIEF vulnerable to denial of service through segmentation fault

Also known asGHSA-38hf-c37x-32hvPYSEC-2022-43138
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs53th percentile — riskier than 53% of all scored CVEsHighest risk
0.00%0.40%0.80%1.20%0.2%0.7%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐍lief

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

A vulnerability in the LIEF::MachO::BinaryParser::init_and_parse function of LIEF v0.12.1 allows attackers to cause a denial of service (DOS) through a segmentation fault via a crafted MachO file. A patch for this issue is available at commit fde2c48986739fabd2cf9b40b9af149a89c57850.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIliefall versions0.12.2pip install --upgrade 'lief==0.12.2'

Affected Products

1 product · 1 configurations
Application
lieflief-project
1 version
0.12.1
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

A vulnerability in the LIEF::MachO::BinaryParser::init_and_parse functio…

github.comNVDOct 2022

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for lief, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update lief to 0.12.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-40922 is resolved across your whole dependency graph.

  3. Workarounds

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

A vulnerability in the LIEF::MachO::BinaryParser::init_and_parse function of LIEF v0.12.1 allows attackers to cause a denial of service (DOS) through a segmentation fault via a crafted MachO file. A [patch](https://github.com/lief-project/LIEF/commit/fde2c48986739fabd2cf9b40b9af149a89c57850) for this issue is available at commit fde2c48986739fabd2cf9b40b9af149a89c57850.
O3 Security · Impact-Aware SCA

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CVE-2022-40922: lief DoS — Fixed in 0.12.2