CVE-2026-5476: nasa cfs Numeric Errors

Vulnerability summary

CVE-2026-5476 is a medium (CVSS 4.6) Numeric Errors vulnerability in nasa cfs. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 23.1% of scored vulnerabilities.

Timeline

1. 03-04-2026
   PublishedVulnerability first disclosed.
2. 04-04-2026
   Last modifiedVulnerability information updated.

Description

A vulnerability was identified in NASA cFS up to 7.0.0 on 32-bit. Affected is the function CFE_TBL_ValidateCodecLoadSize of the file cfe/modules/tbl/fsw/src/cfe_tbl_passthru_codec.c. The manipulation leads to integer overflow. The complexity of an attack is rather high. The exploitability is told to be difficult. A fix is planned for the upcoming version milestone of the project.

• CWE-189Numeric ErrorsWeaknesses in this category are related to improper calculation or conversion of numbers.
• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.