CVE-2023-21216

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

Critical · published December 4, 2023

CVSS v3.1
9.8
EPSS
0%
Percentile
32.9
In the wild
Unconfirmed
What it is

🚨 A use after free vulnerability in Linux's kernel could let attackers execute arbitrary code without breaking into a vault — they just walk right in with no extra privileges needed! 🔥 Think of it like a hotel where a guest checks out but leaves behind their keycard. Anyone can waltz in and access any room without the front desk even noticing. 🏨 This vulnerability could allow a malicious user to elevate their privileges within the system, leading to potentially devastating consequences. Imagine an intruder suddenly having access to admin controls, allowing them to manipulate essential system functions, steal sensitive data, or even deploy malware!

Put simply

Think of it like a hotel where a guest checks out but leaves behind their keycard. Anyone can waltz in and access any room without the front desk even noticing. 🏨 The flaw in PMRChangeSparseMemOSMem of physmem_osmem_linux.c creates an opportunity for arbitrary code execution due to a use after free condition, meaning previously allocated memory is incorrectly accessed after it has been released, allowing malicious code to run.

What to do

This vulnerability could allow a malicious user to elevate their privileges within the system, leading to potentially devastating consequences. Imagine an intruder suddenly having access to admin controls, allowing them to manipulate essential system functions, steal sensitive data, or even deploy malware! Immediate action is crucial! Patch your kernel to the latest stable version as soon as possible and check your systems for any updates related to memory management. Ensure your security protocols are robust to minimize potential exploits. 🛡️ You've got this! Follow these steps to secure your systems, and you'll be a security hero in no time! 🦸

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
0.00398 · 32.9th percentile
Published
2023-12-04T22:40Z
EPSS history
Timeline
  • 04 DEC 22:40Z
    In PMRChangeSparseMemOSMem of physmem_osmem_linux.c, there is a possible arbitrary code execution due to a use after free
    cvelistv5