CVE-2024-58010

5.5 MEDIUM

📋 TL;DR

This CVE describes an integer overflow vulnerability in the Linux kernel's binfmt_flat binary format loader on 32-bit systems. An attacker could exploit this to cause a kernel panic (denial of service) or potentially execute arbitrary code with kernel privileges. Systems running 32-bit Linux kernels with binfmt_flat enabled are affected.

💻 Affected Systems

Products:
  • Linux kernel
Versions: Specific affected versions not specified in CVE description, but vulnerability exists in unpatched versions before fixes were applied.
Operating Systems: Linux distributions with 32-bit kernel support
Default Config Vulnerable: ✅ No
Notes: Only affects 32-bit systems where binfmt_flat is enabled (not enabled by default on most modern distributions).

📦 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 and denial of service, or potential arbitrary code execution with kernel privileges resulting in complete system compromise.

🟠

Likely Case

Kernel panic causing system crash and denial of service, requiring physical or remote console access to reboot.

🟢

If Mitigated

No impact if binfmt_flat is disabled or system is patched.

🌐 Internet-Facing: LOW - Requires local access or ability to upload and execute malicious flat binaries.
🏢 Internal Only: MEDIUM - Local users or processes could trigger the vulnerability to crash the system.

🎯 Exploit Status

Public PoC: ✅ No
Weaponized: UNKNOWN
Unauthenticated Exploit: ✅ No
Complexity: MEDIUM

Requires ability to load malicious flat binaries on affected system. No public exploit code known at this time.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Patches available in stable kernel trees via provided git commits

Vendor Advisory: https://git.kernel.org/stable/c/0b6be54d7386b7addbf9e5947366f94aad046938

Restart Required: Yes

Instructions:

1. Update Linux kernel to version containing fixes from provided git commits. 2. Reboot system to load new kernel.

🔧 Temporary Workarounds

Disable binfmt_flat module

linux

Prevent loading of flat binaries by disabling the binfmt_flat module

echo 'blacklist binfmt_flat' > /etc/modprobe.d/disable-binfmt_flat.conf
rmmod binfmt_flat

🧯 If You Can't Patch

  • Disable binfmt_flat module if not required
  • Restrict user permissions to prevent loading of untrusted flat binaries

🔍 How to Verify

Check if Vulnerable:

Check if binfmt_flat module is loaded: lsmod | grep binfmt_flat

Check Version:

uname -r

Verify Fix Applied:

Check kernel version against patched versions from git commits, verify binfmt_flat is disabled or system is updated

📡 Detection & Monitoring

Log Indicators:

  • Kernel panic messages in /var/log/messages or dmesg
  • Failed flat binary loading attempts

Network Indicators:

  • None - local vulnerability only

SIEM Query:

Search for kernel panic events or binfmt_flat related errors in system logs

🔗 References

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