CVE-2024-52319
📋 TL;DR
A memory corruption vulnerability in the Linux kernel's hugetlb (huge pages) subsystem where clear_gigantic_page() receives an unaligned address, potentially causing memory corruption or information leaks. This affects all Linux systems using huge pages with vulnerable kernel versions. Attackers could exploit this to crash systems or potentially escalate privileges.
💻 Affected Systems
- Linux kernel
📦 What is this software?
Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →⚠️ Risk & Real-World Impact
Worst Case
Kernel panic leading to system crash, or privilege escalation allowing attackers to gain root access and compromise the entire system.
Likely Case
System instability, crashes, or information leaks from kernel memory, potentially exposing sensitive data.
If Mitigated
Minimal impact if systems are patched or don't use huge pages extensively; isolated crashes in affected processes.
🎯 Exploit Status
Requires local access and knowledge of hugetlb subsystem; exploitation depends on specific memory layout and huge page usage.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions containing commits 8aca2bc96c833ba695ede7a45ad7784c836a262e and b79b6fe0737f233f0be1465052b7f0e75f324735
Vendor Advisory: https://git.kernel.org/stable/c/8aca2bc96c833ba695ede7a45ad7784c836a262e
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from your distribution's repository. 2. Reboot system to load new kernel. 3. Verify kernel version matches patched release.
🔧 Temporary Workarounds
Disable hugetlb (huge pages)
allTemporarily disable huge pages to mitigate vulnerability until patching.
echo never > /sys/kernel/mm/transparent_hugepage/enabled
sysctl vm.nr_hugepages=0
🧯 If You Can't Patch
- Restrict local user access and implement strict privilege separation
- Monitor system logs for crashes or unusual memory behavior related to hugetlb
🔍 How to Verify
Check if Vulnerable:
Check kernel version and compare with distribution's security advisories; examine if hugetlb is enabled via 'cat /proc/meminfo | grep HugePages'.Check Version:
uname -rVerify Fix Applied:
Verify kernel version includes the fix commits: 'uname -r' and check with distribution vendor; test hugetlb functionality remains stable.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs, OOM (Out of Memory) errors, or crashes in processes using huge pages
Network Indicators:
- None directly; this is a local memory corruption issue
SIEM Query:
Search for kernel panic events or process crashes with hugetlb-related error messages in system logs.