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

Quick assessment

Affected

Bitdefender pybddisasm

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

pybddisasm 的 Python 绑定中存在越界读取漏洞，可能在指令解码过程中泄露相邻进程的内存。nd_decode 函数在未检查所提供的 Python 缓冲区实际长度的情况下，最多可读取 15 个字节。nd_decode_ex、nd_decode_ex2 和 nd_decode_with_context 函数将调用者提供的缓冲区大小直接传递给解码器，而未将其与 Python 缓冲区的实际长度进行验证。超出缓冲区范围读取的数据可能通过 nd_get_instrux_bytes 函数暴露，该函数返回一个固定长度

CVSS 4.8 · Medium Updated Nov 03, 2026

Possible ATT&CK Techniques 2 AI

T1055.001 · Dynamic-link Library Injection T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Out-of-bounds reads during instruction decoding in pybddisasm

Source: CVE Program / CVE List V5

Vulnerability Description

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 The pybddisasm package is no longer maintained.

Source: CVE Program / CVE List V5

CVSS Information

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: CVE Program / CVE List V5

Vulnerability Type

跨界内存读

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Bitdefender	pybddisasm	0 ~ 0.3.0	-

II. Public POCs for CVE-2026-118444

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-118444

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Other References for CVE-2026-118444 (1)

https://pypi.org/project/pybddisasm/

https://www.cve.org/CVERecord?id=CVE-2026-118444

Same Patch Batch · Bitdefender · 2026-11-03 · 5 CVEs total

CVE-2026-118446	6.9 MEDIUM	Use-after-free in INSTRUX array members in pybddisasm
CVE-2026-118448	6.9 MEDIUM	Uninitialized output buffer returned after nd_to_text failure in pybddisasm
CVE-2026-118445	6.9 MEDIUM	Use-after-free in INSTRUX structure members in pybddisasm
CVE-2026-118447	4.8 MEDIUM	Uninitialized INSTRUX contents returned after decoding failure in pybddisasm

IV. Related Vulnerabilities

Same product: pybddisasm

Same vendor: Bitdefender

Same weakness: CWE-125