CVE-2023-21402

In MMU_UnmapPages of mmu_common.c, there is a possible out of bounds read due to improper input validation

published December 4, 2023

CVSS
—
EPSS
0%
Percentile
34.6
In the wild
Unconfirmed
What it is

⚠️ A sneaky out-of-bounds read in your kernel could give attackers an unexpected leg up! Just think—no additional permissions required! 😮 Picture a librarian who mistakenly leaves the key to a private archives room unlocked. Anyone can stroll in and access confidential documents without any prior authority—this vulnerability in the kernel lets attackers read sensitive data without permission! If fully exploited, this could lead to a local escalation of privileges within the kernel. An attacker could gain unauthorized access to sensitive data or system functions, potentially compromising the entire system’s security. While no user interaction is needed, the implications can be severe if someone takes advantage of this flaw!

Put simply

Picture a librarian who mistakenly leaves the key to a private archives room unlocked. Anyone can stroll in and access confidential documents without any prior authority—this vulnerability in the kernel lets attackers read sensitive data without permission! The vulnerability lies in MMU_UnmapPages of mmu_common.c, where improper input validation allows for out-of-bounds reads. This means an attacker can potentially access memory that they shouldn’t have permission to view.

What to do

If fully exploited, this could lead to a local escalation of privileges within the kernel. An attacker could gain unauthorized access to sensitive data or system functions, potentially compromising the entire system’s security. While no user interaction is needed, the implications can be severe if someone takes advantage of this flaw! To mitigate this vulnerability, ensure your kernel is updated to the latest version with all relevant patches applied. Additionally, conduct a thorough security audit to ensure that input validation practices are followed throughout your system. This proactive approach can significantly reduce risks! You've got this! Stay vigilant and keep your systems secure! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00414 · 34.6th percentile
Published
2023-12-04T22:40Z
EPSS history
Timeline
  • 04 DEC 22:40Z
    In MMU_UnmapPages of mmu_common.c, there is a possible out of bounds read due to improper input validation
    cvelistv5