CVE-2024-53182
📋 TL;DR
This CVE describes a use-after-free vulnerability in the Linux kernel's BFQ I/O scheduler. The vulnerability allows an attacker to cause memory corruption that could lead to system crashes or potentially arbitrary code execution with kernel privileges. Any system running an affected Linux kernel version with BFQ scheduler enabled is vulnerable.
💻 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 →⚠️ Risk & Real-World Impact
Worst Case
Kernel panic leading to denial of service, or potential arbitrary code execution with kernel privileges resulting in complete system compromise.
Likely Case
System instability, kernel panics, or crashes causing denial of service.
If Mitigated
Limited impact if BFQ scheduler is not in use or system has memory protection features enabled.
🎯 Exploit Status
Requires local access to trigger the memory corruption. The KASAN report shows the vulnerability can be triggered through normal I/O operations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions with revert commits 7baf94232651f39f7108c23bc9548bff89bdc77b and cf5a60d971c7b59efb89927919404be655a9e35a
Vendor Advisory: https://git.kernel.org/stable/c/7baf94232651f39f7108c23bc9548bff89bdc77b
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from your distribution's repositories. 2. Reboot system to load new kernel. 3. Verify kernel version after reboot.
🔧 Temporary Workarounds
Disable BFQ scheduler
linuxSwitch to a different I/O scheduler to avoid the vulnerable code path
echo 'mq-deadline' > /sys/block/[device]/queue/scheduler
🧯 If You Can't Patch
- Disable BFQ scheduler on all block devices
- Implement strict access controls to limit local user privileges
🔍 How to Verify
Check if Vulnerable:
Check if BFQ scheduler is enabled: cat /sys/block/[device]/queue/scheduler | grep -i bfqCheck Version:
uname -rVerify Fix Applied:
Check kernel version is patched: uname -r and verify against distribution security advisories📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- KASAN reports of slab-use-after-free in bic_set_bfqq
- System crashes during I/O operations
Network Indicators:
- None - local vulnerability only
SIEM Query:
source="kernel" AND ("KASAN" OR "slab-use-after-free" OR "bic_set_bfqq")