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Medium · 4.8 CVE-2026-118444 EUVD-2026-115704GHSA-p5f7-36qg-83fr

Out-of-bounds reads during instruction decoding in pybddisasm

Published Nov 3, 2026 · Updated Nov 3, 2026 · Assigned by Bitdefender

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 The pybddisasm package is no longer maintained.

Affected products

VendorProductAffectedFixed
Bitdefender pybddisasm ≤ 0.3.0 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Ubuntu 26.10 python3.14 No fix yet —
Ubuntu 26.04 LTS python3.14 No fix yet —
Ubuntu 24.04 LTS python3.12 No fix yet —
Ubuntu 22.04 LTS python3.10 No fix yet —
Show 5 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 22.04 LTS python2.7 +1 No fix yet —
Ubuntu Pro 20.04 LTS python2.7 +2 No fix yet —
Ubuntu Pro 18.04 LTS python2.7 +3 No fix yet —
Ubuntu Pro 16.04 LTS python2.7 +1 No fix yet —
Ubuntu Pro 14.04 LTS python2.7 +2 No fix yet —

References