Base weakness
Incomplete
CWE-253: Incorrect Check of Function Return Value
The product incorrectly checks a return value from a function, which prevents it from detecting errors or exceptional conditions.
Last updated
15
Recorded CVEs
With this primary weakness
0
KEVs
In the CISA KEV catalog
Low
Likelihood of exploit
Per MITRE
Base
Abstraction
MITRE classification
Overview
Important and common functions will return some value about the success of its actions. This will alert the program whether or not to handle any errors caused by that function.
Real-world CVEs
15 recorded CVEs are caused by CWE-253 (Incorrect Check of Function Return Value). The highest-severity and most recent are shown first. 6 new CWE-253 CVEs have been recorded so far in 2026 (2 in 2025).