CVE-2024-53103
📋 TL;DR
This CVE addresses a use-after-free vulnerability in the Linux kernel's hv_sock module where vsk->trans pointer may not be properly initialized to NULL during cleanup, creating a dangling pointer. This affects Linux systems using Hyper-V sockets for virtualization communication. Attackers could potentially exploit this to cause kernel crashes or execute arbitrary code.
💻 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 →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 →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 →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 potential arbitrary code execution with kernel privileges resulting in complete system compromise.
Likely Case
System instability, kernel crashes, or denial of service affecting Hyper-V socket functionality.
If Mitigated
Limited impact if Hyper-V sockets are not in use or proper kernel hardening measures are implemented.
🎯 Exploit Status
Requires local access and knowledge of Hyper-V socket operations. No public exploits known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions containing commits: 285266ef92f7b4bf7d26e1e95e215ce6a6badb4a, 414476c4fb11be070c09ab8f3e75c9ee324a108a, 4bdc5a62c6e50600d8a1c3e18fd6dce0c27c9497, 4fe1d42f2acc463b733bb42e3f8e67dbc2a0eb2d, 7cf25987820350cb950856c71b409e5b6eed52bd
Vendor Advisory: https://git.kernel.org/stable/c/285266ef92f7b4bf7d26e1e95e215ce6a6badb4a
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 hv_sock module loads correctly if needed.
🔧 Temporary Workarounds
Disable hv_sock module
LinuxPrevent loading of vulnerable hv_sock module if Hyper-V sockets are not required
echo 'blacklist hv_sock' >> /etc/modprobe.d/blacklist-hv_sock.conf
rmmod hv_sock
🧯 If You Can't Patch
- Disable Hyper-V socket functionality if not required
- Implement strict access controls to limit local user privileges
🔍 How to Verify
Check if Vulnerable:
Check if hv_sock module is loaded: lsmod | grep hv_sockCheck Version:
uname -rVerify Fix Applied:
Check kernel version against patched versions and verify hv_sock module loads without errors📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- hv_sock module crash logs in dmesg
- System instability reports
Network Indicators:
- Unusual Hyper-V socket traffic patterns
SIEM Query:
source="kernel" AND ("hv_sock" OR "panic" OR "Oops")🔗 References
- https://git.kernel.org/stable/c/285266ef92f7b4bf7d26e1e95e215ce6a6badb4a
- https://git.kernel.org/stable/c/414476c4fb11be070c09ab8f3e75c9ee324a108a
- https://git.kernel.org/stable/c/4bdc5a62c6e50600d8a1c3e18fd6dce0c27c9497
- https://git.kernel.org/stable/c/4fe1d42f2acc463b733bb42e3f8e67dbc2a0eb2d
- https://git.kernel.org/stable/c/7cf25987820350cb950856c71b409e5b6eed52bd
- https://git.kernel.org/stable/c/8621725afb38e111969c64280b71480afde2aace
- https://git.kernel.org/stable/c/98d8dde9232250a57ad5ef16479bf6a349e09b80
- https://git.kernel.org/stable/c/e0fe3392371293175f25028020ded5267f4cd8e3
- https://git.kernel.org/stable/c/e629295bd60abf4da1db85b82819ca6a4f6c1e79
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
