Full Report
Ubuntu security advisory (AV26-239)
Analysis Summary
# Vulnerability: Linux Kernel (NVIDIA) Vulnerabilities in Ubuntu
## CVE Details
*Note: The primary advisory (AV26-239) acts as a rollup for multiple kernels. Specific CVE IDs vary based on the specific NVIDIA driver and kernel interface integration.*
- **CVE ID:** Not explicitly listed in summary; refers to USN-8060-7 and USN-8059-8.
- **CVSS Score:** Generally ranges from **7.0 to 7.8 (High)** for these types of kernel/driver flaws.
- **CWE:** Commonly includes CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) or CWE-416 (Use After Free) typical of kernel-level driver vulnerabilities.
## Affected Systems
- **Products:** Ubuntu Linux (NVIDIA-specific kernel modules)
- **Versions:**
- Ubuntu 22.04 LTS (Jammy Jellyfish)
- Ubuntu 24.04 LTS (Noble Numbat)
- **Configurations:** Systems utilizing NVIDIA proprietary drivers or NVIDIA-specific kernel flavors (e.g., linux-nvidia).
## Vulnerability Description
These vulnerabilities exist in the Linux kernel's interaction with NVIDIA graphics drivers. The flaws typically involve memory management issues or improper validation of input from user-space applications. If successfully exploited, these vulnerabilities could allow a local attacker to cause a denial of service (system crash) or potentially execute arbitrary code with elevated privileges (Root/Kernel mode).
## Exploitation
- **Status:** Not reported as exploited in the wild (based on current advisory data).
- **Complexity:** Medium (Requires specific hardware/driver configuration).
- **Attack Vector:** Local (Attacker must have existing access to the system).
## Impact
- **Confidentiality:** High
- **Integrity:** High
- **Availability:** High
- *Overall Impact:* Total system compromise is possible given the kernel-level execution context.
## Remediation
### Patches
Ubuntu has released updated kernel packages. Users should update their systems to the following versions or later:
- **Ubuntu 24.04 LTS:** Update to the latest version via `USN-8060-7`.
- **Ubuntu 22.04 LTS:** Update to the latest version via `USN-8059-8`.
**Command:**
`sudo apt-get update && sudo apt-get dist-upgrade`
### Workarounds
- Disabling the NVIDIA kernel modules if they are not strictly required.
- Restricting access to the system to trusted users only to mitigate the local attack vector.
## Detection
- **Indicators of Compromise:** Unusual system instability, unexpected kernel panics (OOPS), or unauthorized privilege escalation logs.
- **Detection methods and tools:**
- Verify installed kernel versions: `uname -a`
- Check Ubuntu security status: `pro security-status`
## References
- Ubuntu Security Notice USN-8060-7: hxxps[://]ubuntu[.]com/security/notices/USN-8060-7
- Ubuntu Security Notice USN-8059-8: hxxps[://]ubuntu[.]com/security/notices/USN-8059-8
- Canadian Centre for Cyber Security Advisory: hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/ubuntu-security-advisory-av26-239