CVE-2023-21163

In PMR_ReadBytes of pmr.c, there is a possible arbitrary code execution due to a use after free

published December 4, 2023

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

⚡ A use-after-free vulnerability lurks in PMR_ReadBytes, and it could let attackers execute arbitrary code in the kernel without breaking a sweat! 🚨 Think of it like a restaurant where a waiter forgets to remove a dish from the table after it’s cleared. If someone else comes in and sits down at that table, they might find leftovers still there from the previous customer, which could lead to a surprise surprise meal! This vulnerability allows an attacker to escalate their privileges on the system without needing any special permissions or user interaction. This means they could potentially run any code they like at a high level, giving them access to sensitive data or control over critical components of the system, which is an absolute nightmare!

Put simply

Think of it like a restaurant where a waiter forgets to remove a dish from the table after it’s cleared. If someone else comes in and sits down at that table, they might find leftovers still there from the previous customer, which could lead to a surprise surprise meal! The vulnerability occurs in PMR_ReadBytes of pmr.c due to a use-after-free issue, allowing an attacker to exploit this flaw and execute arbitrary code within the kernel space. Since user interaction is not required, it poses a significant risk even to unsuspecting systems.

What to do

This vulnerability allows an attacker to escalate their privileges on the system without needing any special permissions or user interaction. This means they could potentially run any code they like at a high level, giving them access to sensitive data or control over critical components of the system, which is an absolute nightmare! To mitigate this risk, ensure that your systems are updated with the latest patches that address this vulnerability. Monitor your environment for signs of unauthorized access, and review your code for similar use-after-free patterns that may need fixing. You've got this! Being proactive about security makes you a hero in the fight to keep systems safe! 🛡️

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 PMR_ReadBytes of pmr.c, there is a possible arbitrary code execution due to a use after free
    cvelistv5