CVE-2026-21897CWE-787

CryptoLib Has Out-of-Bounds Write in Crypto_Config_Add_Gvcid_Managed_Parameters

High · published January 10, 2026

CVSS v3.1
7.3
EPSS
0%
Percentile
19.8
In the wild
Unconfirmed
What it is

⚡ An out-of-bounds write is lurking in the CryptoLib's configuration! Up to the 251st entry is allowed, which can lead to some wild overwrites. 🚀 Think of it like a library that has a shelf for 250 books but allows you to keep shoving in more. Eventually, the books start spilling over, and the next one could land anywhere, messing up the entire catalog! This vulnerability could lead to serious consequences, allowing an attacker to manipulate the gvcid_counter, which could skew parameter lookups and registrations. Imagine the chaos on a spacecraft if critical data gets incorrectly configured – mission control might not know what hit them!

Put simply

Think of it like a library that has a shelf for 250 books but allows you to keep shoving in more. Eventually, the books start spilling over, and the next one could land anywhere, messing up the entire catalog! The flaw lies in the Crypto_Config_Add_Gvcid_Managed_Parameters function, which fails to properly check the boundaries of the gvcid_managed_parameters_array, allowing an out-of-bounds write that could corrupt the gvcid_counter.

What to do

This vulnerability could lead to serious consequences, allowing an attacker to manipulate the gvcid_counter, which could skew parameter lookups and registrations. Imagine the chaos on a spacecraft if critical data gets incorrectly configured – mission control might not know what hit them! To mitigate this risk, update CryptoLib to version 1.4.3 immediately. Review the parameters being managed to ensure they're within limits, and consider implementing additional array boundary checks for extra safety. You've got this! With the right updates, you'll keep those spacecraft communications secure and mission-ready! 🛡️

The record
Technical detail
CVSS v3.1
7.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00284 · 19.8th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-01-10T00:07Z
EPSS history
Timeline
  • 10 JAN 00:07Z
    CryptoLib Has Out-of-Bounds Write in Crypto_Config_Add_Gvcid_Managed_Parameters
    cvelistv5