CVE-2022-50185
📋 TL;DR
This CVE describes an out-of-bounds write vulnerability in the Linux kernel's Radeon graphics driver. An attacker with local access could exploit this to write beyond allocated buffer boundaries, potentially leading to privilege escalation or system crashes. This affects Linux systems using Radeon graphics hardware with the vulnerable kernel driver.
💻 Affected Systems
- Linux kernel with Radeon graphics driver
📦 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 →⚠️ Risk & Real-World Impact
Worst Case
Local privilege escalation to kernel-level access, allowing complete system compromise, data theft, or persistent backdoor installation.
Likely Case
Kernel panic or system crash causing denial of service, potentially requiring physical or remote console access to reboot.
If Mitigated
Limited to denial of service if proper kernel hardening and exploit mitigations are in place.
🎯 Exploit Status
Exploitation requires local access and knowledge of kernel memory layout. No public exploits are known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in kernel commits: 136f614931a2bb73616b292cf542da3a18daefd5, 1f341053852be76f82610ce47a505d930512f05c, 782e413e38dffd37cc85b08b1ccb982adb4a93ce, 8508d6d23a247c29792ce2fc0df3f3404d6a6a80, 9faff03617afeced1c4e5daa89e79b3906374342
Vendor Advisory: https://git.kernel.org/stable/c/136f614931a2bb73616b292cf542da3a18daefd5
Restart Required: Yes
Instructions:
1. Update Linux kernel to version containing the fix commits. 2. Check your distribution's security advisories for specific patched kernel versions. 3. Reboot the system to load the new kernel.
🔧 Temporary Workarounds
Disable Radeon driver module
linuxPrevent loading of the vulnerable Radeon kernel module
echo 'blacklist radeon' >> /etc/modprobe.d/blacklist-radeon.conf
update-initramfs -u
reboot
🧯 If You Can't Patch
- Restrict local user access to systems with Radeon graphics hardware
- Implement strict privilege separation and limit users who can execute code on affected systems
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if Radeon module is loaded: uname -r && lsmod | grep radeonCheck Version:
uname -rVerify Fix Applied:
Verify kernel version is patched by checking if it includes the fix commits: git log --oneline | grep -E '136f6149|1f341053|782e413e|8508d6d2|9faff036'📡 Detection & Monitoring
Log Indicators:
- Kernel oops messages in /var/log/kern.log or dmesg
- System crashes or unexpected reboots
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
source="kernel" AND ("Oops" OR "general protection fault" OR "kernel panic")🔗 References
- https://git.kernel.org/stable/c/136f614931a2bb73616b292cf542da3a18daefd5
- https://git.kernel.org/stable/c/1f341053852be76f82610ce47a505d930512f05c
- https://git.kernel.org/stable/c/782e413e38dffd37cc85b08b1ccb982adb4a93ce
- https://git.kernel.org/stable/c/8508d6d23a247c29792ce2fc0df3f3404d6a6a80
- https://git.kernel.org/stable/c/9faff03617afeced1c4e5daa89e79b3906374342
- https://git.kernel.org/stable/c/db1a9add3f90ff1c641974d5bb910c16b87af4ef
- https://git.kernel.org/stable/c/deb603c5928e546609c0d5798e231d0205748943
- https://git.kernel.org/stable/c/ea73869df6ef386fc0feeb28ff66742ca835b18f
