4.8

CVE-2026-118447: Uninitialized INSTRUX contents returned after decoding failure in pybddisasm

Awaiting analysis
AliasesUBUNTU-CVE-2026-118447
Published 03-11-2026Last modified 03-11-2026

Vulnerability summary

CVE-2026-118447 is a medium (CVSS 4.8) Use of Uninitialized Variable vulnerability in bitdefender pybddisasm. EPSS estimates a 0.10% chance of exploitation in the next 30 days, higher than 1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 4.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.8/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.10%
0%100%
Low · Change unavailable
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 03-11-2026
    PublishedVulnerability first disclosed.
  2. 03-11-2026
    Last modifiedVulnerability information updated.

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 The pybddisasm package is no longer maintained.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.10%

Chance of exploitation in the next 30 days

Percentile

1%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

03-11-202604-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu11 products
  • python2.7All versions (No fix recorded)
  • python3.10All versions (No fix recorded)
  • python3.11All versions (No fix recorded)
  • python3.12All versions (No fix recorded)
  • python3.14All versions (No fix recorded)
Bitdefender1 product

2 vendors · 12 products

References

3 links