# CVE-2026-118444: Out-of-bounds reads during instruction decoding in pybddisasm

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

Out-of-bounds read vulnerabilities in the pybddisasm Python bindings may disclose adjacent process memory during instruction decoding. The nd_decode function may read up to 15 bytes without checking the actual length of the supplied Python buffer. The nd_decode_ex, nd_decode_ex2, and nd_decode_with_context functions pass the caller-supplied buffer size to the decoder without validating it against the actual length of the Python buffer. Data read beyond the buffer may be exposed through nd_get_instrux_bytes, which returns a fixed-length list of 16 bytes. Exploitation requires an application to invoke the affected APIs with a short buffer or an oversized length and to expose the resulting bytes to an attacker. The pybddisasm package is no longer maintained.

## Remediation

- fix: Discontinue use of the unmaintained pybddisasm package. No fixed release will become available.. (source: CNA: Bitdefender)

## Affected products and versions

- Bitdefender / pybddisasm (pybddisasm): ≥ 0; ≤ 0.3.0 (affected, python). Source: CNA: Bitdefender

## Severity and prioritization

- CVSS 4.0: 4.8 (medium); CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N; source: CNA: Bitdefender

- CVSS 4.0: 4.8 (medium); CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: cve-requests@bitdefender.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-125

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://pypi.org/project/pybddisasm/ (CNA: Bitdefender)

- https://pypi.org/project/pybddisasm/ (cve-requests@bitdefender.com)

## Provenance

- CNA: Bitdefender: https://www.cve.org/CVERecord?id=CVE-2026-118444; retrieved 2026-11-03; source updated 2026-11-03

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-118444; retrieved 2026-11-03; source updated 2026-11-03

Revision: f13313e7203b3e8e15eb021a42ed915945b81ae001f56019a2af3a9294d98dc5

Canonical: https://y2.dev/cve/CVE-2026-118444

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