CVE-2024-58240
📋 TL;DR
This CVE addresses a use-after-free vulnerability in the Linux kernel's TLS implementation that could allow local attackers to escalate privileges or cause denial of service. The vulnerability affects systems running unpatched Linux kernels with TLS enabled. Attackers need local access to exploit this vulnerability.
💻 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 →⚠️ Risk & Real-World Impact
Worst Case
Local privilege escalation to root, kernel panic leading to system crash, or arbitrary code execution in kernel context
Likely Case
Local denial of service through kernel panic or system crash
If Mitigated
Minimal impact with proper access controls limiting local user privileges
🎯 Exploit Status
Requires local access and knowledge of kernel exploitation techniques; race condition exploitation can be challenging
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions containing commits: 41532b785e9d79636b3815a64ddf6a096647d011, 48905146d11dbf1ddbb2967319016a83976953f5, 999115298017a675d8ddf61414fc7a85c89f1186, dec5b6e7b211e405d3bcb504562ab21aa7e5a64d
Vendor Advisory: https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
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 TLS kernel module
linuxPrevent loading of vulnerable TLS kernel module
echo 'install tls /bin/false' >> /etc/modprobe.d/disable-tls.conf
rmmod tls
Restrict local user access
linuxLimit local user privileges to reduce attack surface
Review and restrict sudo privileges
Implement principle of least privilege for local accounts
🧯 If You Can't Patch
- Implement strict access controls to limit local user privileges
- Monitor system logs for kernel panic or crash events
🔍 How to Verify
Check if Vulnerable:
Check kernel version and compare with patched versions from distribution advisoriesCheck Version:
uname -rVerify Fix Applied:
Verify kernel version matches patched version and check that system remains stable during TLS operations📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- System crash/reboot events
- TLS-related kernel oops messages
Network Indicators:
- None - local vulnerability only
SIEM Query:
source="kernel" AND ("panic" OR "oops" OR "BUG") AND "tls"🔗 References
- https://git.kernel.org/stable/c/41532b785e9d79636b3815a64ddf6a096647d011
- https://git.kernel.org/stable/c/48905146d11dbf1ddbb2967319016a83976953f5
- https://git.kernel.org/stable/c/999115298017a675d8ddf61414fc7a85c89f1186
- https://git.kernel.org/stable/c/dec5b6e7b211e405d3bcb504562ab21aa7e5a64d
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
