CVE-2024-39471
Description
A flaw was found in the Linux kernel's drm/amdgpu component. This vulnerability, caused by an out-of-bounds read in the sdma_v4_0_irq_id_to_seq function, could allow a local attacker to read sensitive information from kernel memory. This could lead to information disclosure or a denial of service (DoS) due to a system crash.
Mitigation
To mitigate this issue, prevent the `amdgpu` kernel module from loading. This can be achieved by creating a blacklist configuration file.
1. Create a file named `/etc/modprobe.d/blacklist-amdgpu.conf` with the following content:
blacklist amdgpu
2. Regenerate the initramfs to ensure the blacklist is applied during boot:
For Red Hat Enterprise Linux 8 and 9:
bashFor Red Hat Enterprise Linux 7:
sudo dracut -f -v
bash
sudo dracut -f
3. Reboot the system for the changes to take effect.
**Caveats:** Blacklisting the `amdgpu` module will disable functionality related to AMD GPUs, potentially affecting graphical display or any applications that rely on AMD graphics hardware. Ensure this is acceptable for your system's intended use before applying the mitigation.
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).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 4.4 | 7.1 | 7.8 |
| Attack Vector | Local | Local | Local |
| Attack Complexity | Low | Low | Low |
| Privileges Required | High | Low | Low |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | None | High | High |
| Integrity Impact | None | None | High |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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