CVE-2021-39990

The screen lock module has a Stack-based Buffer Overflow vulnerability.Successful exploitation of this vulnerability may affect user experience

Critical · published January 3, 2022

CVSS v3.1
9.8
EPSS
1%
Percentile
54.6
In the wild
Unconfirmed
What it is

🔥 There's a stack-based buffer overflow lurking in the screen lock module! If exploited, it could disrupt your entire user experience in catastrophic ways! Think of it like a crowded elevator where too many people squeeze in beyond capacity — eventually, it becomes chaotic, and no one can get out smoothly. This vulnerability lets attackers push too much data into a critical area, leading to a system crash. If an attacker successfully exploits this vulnerability, your device could become unresponsive or behave unexpectedly, severely affecting your user experience. In a worst-case scenario, it could allow unauthorized access, leading to data breaches or system takeovers. That's absolutely devastating!

Put simply

Think of it like a crowded elevator where too many people squeeze in beyond capacity — eventually, it becomes chaotic, and no one can get out smoothly. This vulnerability lets attackers push too much data into a critical area, leading to a system crash. CVE-2021-39990 is a stack-based buffer overflow vulnerability in the screen lock module, which allows an attacker to overflow the stack by sending excessive data, potentially leading to arbitrary code execution.

What to do

If an attacker successfully exploits this vulnerability, your device could become unresponsive or behave unexpectedly, severely affecting your user experience. In a worst-case scenario, it could allow unauthorized access, leading to data breaches or system takeovers. That's absolutely devastating! To mitigate this risk, immediately patch your system to the latest version provided by the vendor. Ensure your screen lock settings are configured properly and monitor for any unusual activities. Regular security audits can also help identify and address vulnerabilities proactively. You've got this! With the right patching and monitoring, you can keep your system safe and sound! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00752 · 54.6th percentile
Published
2022-01-03T21:07Z
EPSS history
Timeline
  • 03 JAN 21:07Z
    The screen lock module has a Stack-based Buffer Overflow vulnerability.Successful exploitation of this vulnerability may affect user experience
    cvelistv5