CVE-2023-0030
📋 TL;DR
A use-after-free vulnerability in the Linux kernel's nouveau graphics driver allows a local attacker to trigger a memory overflow via the nvkm_vma_tail function. This can lead to system crashes or potential privilege escalation. Affects Linux systems using the nouveau driver for NVIDIA graphics hardware.
💻 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
Local privilege escalation to root, complete system compromise, or kernel panic causing system crash.
Likely Case
Local denial of service through kernel panic or system crash.
If Mitigated
Limited impact if proper access controls restrict local user privileges.
🎯 Exploit Status
Requires local access and knowledge of triggering the specific memory overflow condition in the nouveau driver.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel with commit 729eba3355674f2d9524629b73683ba1d1cd3f10
Vendor Advisory: https://security.netapp.com/advisory/ntap-20230413-0010/
Restart Required: Yes
Instructions:
1. Update Linux kernel to version containing fix commit 729eba3355674f2d9524629b73683ba1d1cd3f10. 2. Reboot system to load new kernel.
🔧 Temporary Workarounds
Disable nouveau driver
linuxBlacklist nouveau driver to prevent loading
echo 'blacklist nouveau' >> /etc/modprobe.d/blacklist-nouveau.conf
update-initramfs -u
reboot
Use proprietary NVIDIA driver
linuxReplace nouveau with NVIDIA's proprietary driver
apt-get install nvidia-driver-xxx
or yum install kmod-nvidia
🧯 If You Can't Patch
- Restrict local user access to systems with vulnerable kernel
- Monitor for kernel panic/crash events and investigate root causes
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if nouveau driver is loaded: 'uname -r' and 'lsmod | grep nouveau'Check Version:
uname -rVerify Fix Applied:
Verify kernel version includes commit 729eba3355674f2d9524629b73683ba1d1cd3f10: 'git log --oneline | grep 729eba3355674f2d9524629b73683ba1d1cd3f10'📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- System crash/reboot events
- nouveau driver error messages in dmesg
Network Indicators:
- None - local exploit only
SIEM Query:
source="kernel" AND ("panic" OR "Oops" OR "nouveau")🔗 References
- https://bugzilla.redhat.com/show_bug.cgi?id=2157270
- https://github.com/torvalds/linux/commit/729eba3355674f2d9524629b73683ba1d1cd3f10
- https://security.netapp.com/advisory/ntap-20230413-0010/
- https://bugzilla.redhat.com/show_bug.cgi?id=2157270
- https://github.com/torvalds/linux/commit/729eba3355674f2d9524629b73683ba1d1cd3f10
- https://security.netapp.com/advisory/ntap-20230413-0010/
- https://bugzilla.redhat.com/show_bug.cgi?id=2157270
