CVE-2026-47555
Description
A flaw was found in nvidia-driver. A local user can exploit an issue in the kernel mode layer that causes uninitialized kernel memory to be copied back into user space. Successful exploitation allows an attacker to read sensitive data from the operating system kernel, resulting in information disclosure.
Statement
This vulnerability is rated as Moderate severity because exploitation requires local access and is limited to confidentiality exposure without granting code execution or system crash capabilities. In Red Hat Enterprise Linux environments, exposure is restricted to systems equipped with NVIDIA GPUs where the proprietary driver kernel module is actively loaded. An authenticated local user could potentially read residual kernel memory contents, but cannot modify system state or impact overall availability.
Mitigation
To mitigate this vulnerability on systems where NVIDIA GPU acceleration is not required, prevent the driver module from loading by configuring modprobe rules:
echo "blacklist nvidia" >> /etc/modprobe.d/nvidia-blacklist.conf
echo "install nvidia /bin/true" >> /etc/modprobe.d/nvidia-blacklist.conf
If the module is currently loaded, unload it or restart the host:
modprobe -r nvidia
Warning: Disabling or unloading the NVIDIA driver will disable GPU hardware acceleration, display outputs managed by the card, and compute workloads. A system restart is required for changes to take full effect if the driver cannot be unloaded while in use.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | N/A | 5.5 |
| Attack Vector | Local | N/A | Local |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | High | N/A | High |
| Integrity Impact | None | N/A | None |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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