Vulnerability · Published Nov 3, 2026 · Assigned by Bitdefender
CVE-2026-118447Uninitialized INSTRUX contents returned after decoding failure in pybddisasm
Medium 4.8
In plain English
A medium-severity security flaw in pybddisasm from Bitdefender. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).
Official description
A use of uninitialized memory vulnerability in the pybddisasm Python bindings may disclose process memory when instruction decoding fails. The nd_decode, nd_decode_ex, nd_decode_ex2, and nd_decode_with_context functions may return an INSTRUX object whose contents have not been initialized after an unsuccessful decoding operation, including failures caused by invalid parameters. Accessing members of the returned object may expose residual process memory. Exploitation requires an application to access and expose the returned object contents after a decoding failure. The pybddisasm package is no longer maintained.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | python3.10 | no fix listed | UBUNTU-CVE-2026-118447 |
| Ubuntu:24.04:LTS | python3.12 | no fix listed | UBUNTU-CVE-2026-118447 |
| Ubuntu:26.04:LTS | python3.14 | no fix listed | UBUNTU-CVE-2026-118447 |
| Ubuntu:26.10 | python3.14 | no fix listed | UBUNTU-CVE-2026-118447 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Bitdefender | pybddisasm | 0 – through 0.3.0 |
Weakness: CWE-457 · Vector: 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